Navigation General 1



These pages contains all possible questions which might be thrown at you in the "Navigation General" module exam.  When you go in for your exam, your test questions will be selected from the list below.



4: Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are __________.

    a. accurate only in the Polar regions
    b. accurate electronic servomechanisms
    c. hand operated
    d. accurate only if the vessel is underway
5: A vessel is steaming in east longitude on January 25 and crosses the International Date Line on an eastbound course at 0900 zone time. What is the date and time at Greenwich when the vessel crosses the line?

    a. 0900, 24 January
    b. 2100, 24 January
    c. 2100, 25 January
    d. 0900, 26 January
6: Wind velocity varies __________.

    a. directly with the temperature of the air mass
    b. directly with the pressure gradient
    c. inversely with the barometric pressure
    d. inversely with the absolute humidity
7: The period at high or low tide during which there is no change in the height of the water is called the __________.

    a. range of the tide
    b. plane of the tide
    c. stand of the tide
    d. reversing of the tide
8: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.

    a. come left
    b. come right
    c. continue on the present course
    d. wait until the lights are no longer in a vertical line
9: When displayed under a single-span fixed bridge, red lights indicate __________.

    a. the channel boundaries
    b. that vessels must stop
    c. the bridge is about to open
    d. that traffic is approaching from the other side
10: The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125° at 0.6 knot. What current should you expect?

    a. 119° at 0.9 knot
    b. 172° at 1.1 knots
    c. 225° at 0.6 knot
    d. 340° at 0.4 knot
11: A buoy having red and green horizontal bands would have a light characteristic of __________.

    a. interrupted quick flashing
    b. composite group flashing
    c. Morse (A)
    d. quick flashing
12: Lines on a chart which connect points of equal magnetic variation are called __________.

    a. magnetic latitudes
    b. magnetic declinations
    c. dip
    d. isogonic lines
13: Most modern Loran-C receivers, when not tracking properly, have a(n) __________.

    a. bell alarm to warn the user
    b. lighted alarm signal to warn the user
    c. alternate signal keying system
    d. view finder for each station
14: You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?

    a. Test the electrical gain to the thermograph pens
    b. Set the zone pen on the correct quadrant
    c. Line the course pen up on the exact heading of the ship
    d. Adjust the chart paper to indicate the correct time
15: What is the length of a nautical mile?

    a. 1,800 meters
    b. 2,000 yards
    c. 6,076 feet
    d. 5,280 feet
16: The direction of the surface wind is __________.

    a. directly from high pressure toward low pressure
    b. directly from low pressure toward high pressure
    c. from high pressure toward low pressure deflected by the earth's rotation
    d. from low pressure toward high pressure deflected by the earth's rotation
17: "Stand" of the tide is that time when __________.

    a. the vertical rise or fall of the tide has stopped
    b. slack water occurs
    c. tidal current is at a maximum
    d. the actual depth of the water equals the charted depth
18: A vessel's position should be plotted using bearings of __________.

    a. buoys close at hand
    b. fixed known objects on shore
    c. buoys at a distance
    d. All of the above
19: You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________.

    a. the fixed, green light starts to flash
    b. the amber light changes to green
    c. the red light is extinguished
    d. the red light changes to green
20: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

    a. 77 miles
    b. 82 miles
    c. 87 miles
    d. 93 miles
21: Which buoy is NOT numbered?

    a. Green can buoy
    b. Preferred-channel buoy
    c. Red lighted buoy
    d. Green gong buoy
22: Charts showing the coast of Mexico are produced by the United States __________.

    a. National Geospatial-Intelligence Agency
    b. Coast Guard
    c. Naval Observatory
    d. National Ocean Service
23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.

    a. signals begin to blink
    b. signals begin to shift
    c. stations discontinue transmission
    d. stations transmit grass
25: You are in LONG 144°E. The date is 6 February, and the zone time is 0800. The Greenwich date and time are __________.

    a. 2200, 5 February
    b. 2300, 5 February
    c. 1700, 6 February
    d. 1800, 6 February
26: Wind direction may be determined by observing all of the following EXCEPT __________.

    a. low clouds
    b. waves
    c. whitecaps
    d. swells
27: Spring tides are tides that __________.

    a. have lows lower than normal and highs higher than normal
    b. have lows higher than normal and highs lower than normal
    c. are unpredictable
    d. occur in the spring of the year
28: When using a buoy as an aid to navigation which of the following should be considered?

    a. The buoy should be considered to always be in the charted location.
    b. If the light is flashing, the buoy should be considered to be in the charted location.
    c. The buoy may not be in the charted position.
    d. The buoy should be considered to be in the charted position if it has been freshly painted.
29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.

    a. a quick flashing red or green aid to navigation
    b. a steady blue light in the center of the span
    c. 3 white lights in a vertical line in the center of the span
    d. a flashing green light in the center of the span
29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.

    a. a quick flashing red or green aid to navigation
    b. a steady blue light in the center of the span
    c. 3 white lights in a vertical line in the center of the span
    d. a flashing green light in the center of the span
30: When taking an amplitude, the Sun's center should be observed on the visible horizon when __________.

    a. in high latitudes
    b. the Sun is near or at a solstice
    c. the declination is of a different name from the latitude
    d. the Sun's declination is at or near 0°
31: When approaching a preferred-channel buoy, the best channel is NOT indicated by the __________.

    a. light characteristic
    b. color of the uppermost band
    c. shape of an unlighted buoy
    d. color of the light
32: The datum used for soundings on charts of the Atlantic Coast of the United States is mean __________.

    a. low water
    b. lower low water
    c. higher high water
    d. high water
34: The Local Notice to Mariners is usually published __________.

    a. daily
    b. weekly
    c. monthly
    d. semiannually
35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?

    a. 1200, 3 July
    b. 2000, 3 July
    c. 1200, 2 July
    d. 2000, 2 July
37: What does the term "tide" refer to?

    a. Horizontal movement of the water
    b. Vertical movement of the water
    c. Mixing tendency of the water
    d. Salinity content of the water
38: When navigating a vessel, you __________.

    a. can always rely on a buoy to be on station
    b. can always rely on a buoy to show proper light characteristics
    c. should assume a wreck buoy is directly over the wreck
    d. should never rely on a floating aid to maintain its exact position
39: Civil twilight begins at 1910 zone time on 20 July 1981. Your DR position at that time is LAT 22°16'N, LONG 150°06'W. Which statement concerning the planets available for evening sights is TRUE?

    a. Venus will have a westerly meridian angle.
    b. Mars will set about one hour after the Sun sets.
    c. Mars, Venus, Jupiter, and Saturn will be above the horizon.
    d. Sights of Saturn, Jupiter, and Venus will yield a good three-line-of-position fix.
40: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current?

    a. Billingsport
    b. Marcus Hook
    c. Mile 63
    d. Mile 52
41: Mean high water is the reference plane used for __________.

    a. all vertical measurements
    b. heights above water of land features such as lights
    c. soundings on the East and West Coasts
    d. water depths on the East Coast only
42: The datum used for soundings on charts of the East Coast of the United States is __________.

    a. mean low water springs
    b. mean low water
    c. mean lower low water
    d. half tide level
43: A buoy with a composite group-flashing light indicates a(n) __________.

    a. anchorage area
    b. fish net area
    c. bifurcation
    d. dredging area
44: The speed of sound through ocean water is nearly always __________.

    a. faster than the speed of calibration for the fathometer
    b. the same speed as the speed of calibration for the fathometer
    c. slower than the speed of calibration for the fathometer
    d. faster than the speed of calibration for the fathometer, unless the water is very warm
45: The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?

    a. 03-25-04, 21 September
    b. 02-25-04, 21 September
    c. 01-25-04, 21 September
    d. 01-25-04, 20 September
46: What wind reverses directions seasonally?

    a. Monsoon winds
    b. Hooked trades
    c. Jet stream
    d. Secondary winds
47: The range of tide is the __________.

    a. distance the tide moves out from the shore
    b. duration of time between high and low tide
    c. difference between the heights of high and low tide
    d. maximum depth of the water at high tide
48: When should a navigator rely on the position of floating aids to navigation?

    a. During calm weather only
    b. During daylight only
    c. Only when inside a harbor
    d. Only when fixed aids are not available
49: While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?

    a. 000°T
    b. 090°T
    c. 150°T
    d. 240°T
50: The difference between the heights of low and high tide is the __________.

    a. period
    b. range
    c. distance
    d. depth
51: In the U.S. Aids to Navigation System, red and green horizontally-banded buoys mark __________.

    a. channels for shallow draft vessels
    b. general anchorage areas
    c. fishing grounds
    d. junctions or bifurcations
52: The reference datum used in determining the heights of land features on most charts is __________.

    a. mean sea level
    b. mean high water
    c. mean low water
    d. half-tide level
55: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59'E longitude. Your LMT and date are __________.

    a. 00h 02m on the 4th
    b. 00h 02m on the 5th
    c. 23h 50m on the 5th
    d. 00h 02m on the 6th
56: A strong, often violent, northerly wind occurring on the Pacific coast of Mexico, particularly during the colder months, is called __________.

    a. Tehuantepecer
    b. Papagayo
    c. Norther
    d. Pampero
57: The height of tide is the __________.

    a. depth of water at a specific time due to tidal effect
    b. difference between the depth of the water and the area's tidal datum
    c. difference between the depth of the water and the high water tidal level
    d. difference between the depth of the water at high tide and the depth of the water at low tide
57: The height of tide is the __________.

    a. depth of water at a specific time due to tidal effect
    b. difference between the depth of the water and the area's tidal datum
    c. difference between the depth of the water and the high water tidal level
    d. difference between the depth of the water at high tide and the depth of the water at low tide
58: You should plot your dead reckoning position __________.

    a. at every course change
    b. hourly
    c. at every speed change
    d. All of the above are correct.
59: For navigational purposes, each great circle on the Earth has a length of __________.

    a. 3,600 miles
    b. 5,400 miles
    c. 12,500 miles
    d. 21,600 miles
60: The predicted time that the ebb begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1630 and turn for 12 knots, at what point will you lose the flood current?

    a. New Castle
    b. Reedy Island
    c. Mile 44
    d. Ship John Shoal Lt.
61: Red lights may appear on __________.

    a. horizontally banded buoys
    b. vertically striped buoys
    c. yellow buoys
    d. spherical buoys
62: Charted depth is the __________.

    a. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
    b. vertical distance from the chart sounding datum to the ocean bottom
    c. average height of water over a specified period of time
    d. average height of all low waters at a place
62: Charted depth is the __________.

    a. vertical distance from the chart sounding datum to the ocean bottom, plus the height of tide
    b. vertical distance from the chart sounding datum to the ocean bottom
    c. average height of water over a specified period of time
    d. average height of all low waters at a place
63: A "full service" Loran-C receiver will provide __________.

    a. matching pulse rates of at least 20 stations
    b. an automatic on-and-off switch
    c. a horizontal matching of all delayed hyperbolic signals
    d. automatic signal acquisition and cycle matching
64: Mean lower low water is the reference plane used for __________.

    a. all vertical measurements
    b. heights above water for lights, mountains, etc.
    c. soundings on the U.S. east and west coasts
    d. water depths on the U.S. east coast only
65: The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?

    a. 1842
    b. 1652
    c. 0728
    d. 0652
66: What will a veering wind do?

    a. Change direction in a clockwise manner in the Northern Hemisphere
    b. Circulate about a low pressure center in a counterclockwise manner in the Northern Hemisphere
    c. Vary in strength constantly and unpredictably
    d. Circulate about a high pressure center in a clockwise manner in the Southern Hemisphere
67: What is the definition of height of tide?

    a. The vertical distance from the tidal datum to the level of the water at any time
    b. The vertical difference between the heights of low and high water
    c. The vertical difference between a datum plane and the ocean bottom
    d. The vertical distance from the surface of the water to the ocean floor
68: A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) __________.

    a. dead-reckoning position
    b. estimated position
    c. fix
    d. running fix
69: The parallax angle will vary the most with the time of year for __________.

    a. Venus
    b. Jupiter
    c. Saturn
    d. Polaris
70: The station located at "A" is the __________. (D001NG )

    a. on station
    b. off station
    c. master station
    d. secondary station
71: A preferred-channel buoy may be __________.

    a. lettered
    b. spherical
    c. showing a white light
    d. All of the above
72: The datum from which the predicted heights of tides are reckoned in the tide tables is __________.

    a. mean low water
    b. the same as that used for the charts of the locality
    c. the highest possible level
    d. given in table three of the tide tables
74: When operated over a muddy bottom, a fathometer may indicate __________.

    a. a shallow depth reading
    b. a zero depth reading
    c. no depth reading
    d. two depth readings
75: The zone time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?

    a. 0659
    b. 0652
    c. 1859
    d. 1852
76: In the Northern Hemisphere, a wind that shifts counterclockwise is a __________.

    a. veering wind
    b. backing wind
    c. reverse wind
    d. chinook wind
77: When there are small differences between the heights of two successive high tides or two low tides, in a tidal day, the tides are called __________.

    a. diurnal
    b. semidiurnal
    c. solar
    d. mixed
78: A single line of position combined with a dead-reckoning position results in a(n) __________.

    a. assumed position
    b. estimated position
    c. fix
    d. running fix
79: The rate of increase in hour angle is the slowest for __________.

    a. the Sun
    b. the Moon
    c. Mars
    d. Mercury
80: When the moon is at first quarter or third quarter phase, what type of tides will occur?

    a. Apogean
    b. Perigean
    c. Neap
    d. Spring
81: A buoy with a composite group-flashing light indicates a(n) __________.

    a. bifurcation
    b. fish net area
    c. anchorage area
    d. dredging area
82: On the west coast of North America, charted depths are taken from __________.

    a. high water
    b. mean tide level
    c. mean low water
    d. mean lower low water
83: All Loran-C transmitting stations are equipped with cesium frequency standards which permit __________.

    a. every station in one chain to transmit at the same time
    b. each station to transmit without reference to another station
    c. on-line transmission of single-line transmitters at the same time
    d. each station to only depend on the master for synchronization and signal ratio
84: When using an echo sounder in deep water, it is NOT unusual to __________.

    a. receive a strong return at about 200 fathoms (366 meters) during the day, and one nearer the surface at night
    b. receive a first return near the surface during the day, and a strong return at about 200 fathoms (366 meters) at night
    c. receive false echoes at a constant depth day and night
    d. have to recalibrate every couple of days due to inaccurate readings
85: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________.

    a. 00h 02m on the 4th
    b. 00h 02m on the 5th
    c. 23h 50m on the 5th
    d. 00h 02m on the 6th
86: A weather forecast states that the wind will commence backing. In the Northern Hemisphere, this would indicate that it will __________.

    a. shift in a clockwise manner
    b. shift in a counterclockwise manner
    c. continue blowing from the same direction
    d. decrease in velocity
87: A tide is called diurnal when __________.

    a. only one high and one low water occur during a lunar day
    b. the high tide is higher and the low tide is lower than usual
    c. the high tide and low tide are exactly six hours apart
    d. two high tides occur during a lunar day
88: Which position includes the effects of wind and current?

    a. Dead reckoning position
    b. Leeway position
    c. Estimated position
    d. Set position
89: The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet?

    a. 7 hours
    b. 11 hours
    c. 19 hours
    d. 23 hours
90: When the moon is new or full, which type of tides occur?

    a. Neap
    b. Spring
    c. Diurnal
    d. Apogean
91: A preferred-channel buoy will show a __________.

    a. white light whose characteristic is Morse (A)
    b. group-occulting white light
    c. composite group-flashing (2 + 1) white light
    d. composite group-flashing (2 + 1) red or green light
92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.

    a. mean low water springs
    b. mean low water
    c. mean lower low water
    d. lowest normal low water
93: The time interval between the transmission of signals from a pair of Loran-C stations is very closely controlled and operates with __________.

    a. an atomic time standard
    b. Daylight Savings Time
    c. Eastern Standard Time
    d. Greenwich Mean Time
94: When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom?

    a. Echoes from a deep scattering layer
    b. Echoes from schools of fish
    c. Multiple returns reflected from the bottom to the surface and to the bottom again
    d. Poor placement of the transducer on the hull
95: The difference in local time between an observer on 114°W and one on 119°W is __________.

    a. 1.25 minutes
    b. 5 minutes
    c. 20 minutes
    d. 75 minutes
96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.

    a. shift in a clockwise manner
    b. shift in a counterclockwise manner
    c. continue blowing from the same direction
    d. increase in velocity
97: The lunar or tidal day is __________.

    a. about 50 minutes shorter than the solar day
    b. about 50 minutes longer than the solar day
    c. about 10 minutes longer than the solar day
    d. the same length as the solar day
98: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

    a. dead reckoning position
    b. estimated position
    c. fix
    d. None of the above
99: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

    a. smoother seas and warmer water
    b. steeper waves, closer together
    c. long swells
    d. cirrus clouds
100: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. What course should you steer at 12 knots to have the maximum CPA?

    a. 219°
    b. 208°
    c. 199°
    d. 190°
101: A lighted preferred-channel buoy may show a __________.

    a. fixed red light
    b. Morse (A) white light
    c. composite group-flashing light
    d. yellow light
102: Which statement about an NGA (NIMA) chart with stock no.23BHA23433 is TRUE?

    a. This is a non-navigational or special purpose chart.
    b. It is not included in the portfolio.
    c. It is a chart of an area in subregion 23.
    d. It depicts a major portion of an ocean.
103: In Loran-C the high accuracy of atomic time and frequency controls allows each station to operate __________.

    a. at higher frequencies
    b. on schedule, independently
    c. at 1,975 kHz
    d. in a multiplex phase
104: What should you apply to a fathometer reading to determine the depth of water?

    a. Subtract the draft of the vessel.
    b. Add the draft of the vessel.
    c. Subtract the sea water correction .
    d. Add the sea water correction.
105: If the GMT is 1500, the time at 75°E longitude is __________.

    a. 1000
    b. 1500
    c. 1700
    d. 2000
106: A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a __________.

    a. foehn
    b. chinook
    c. land breeze
    d. sea breeze
107: The average height of the surface of the sea for all stages of the tide over a 19 year period is called __________.

    a. mean high water
    b. mean low water
    c. half-tide level
    d. mean sea level
108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.

    a. dead-reckoning position
    b. estimated position
    c. fix
    d. running fix
109: While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown bearing 053°T. What action should you take? (D021NG )

    a. Alter course to 053° and leave the buoy close aboard on either side
    b. Maintain course
    c. Alter course to 060° and ensure that the true bearings decreases
    d. Alter course to port to rapidly open the bearing to the right
110: A millibar is a unit of __________.

    a. humidity
    b. precipitation
    c. pressure
    d. temperature
111: Green lights may appear on __________.

    a. horizontally banded buoys
    b. vertically striped buoys
    c. yellow buoys
    d. spherical buoys
112: Which chart number indicates an NGA (NIMA) chart designed for inshore coastwise navigation?

    a. LCORR5868
    b. COMBT800564
    c. 17XHA17365
    d. 16ACO16595
113: The type of transmission used in Loran-C is a __________.

    a. single pulse
    b. wide pulse
    c. multipulse
    d. narrow pulse
114: All echo-sounders can measure the __________.

    a. actual depth of water
    b. actual depth of water below keel
    c. average depth from waterline to hard bottom
    d. average depth of water to soft bottom
114: All echo-sounders can measure the __________.

    a. actual depth of water
    b. actual depth of water below keel
    c. average depth from waterline to hard bottom
    d. average depth of water to soft bottom
115: The date is the same all over the world at __________.

    a. 0000 GMT
    b. 1200 GMT
    c. 0000 LMT for an observer at 90°E longitude
    d. no time
116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?

    a. Coastal breeze
    b. Sea breeze
    c. Land breeze
    d. Mistral
117: Mean high water is the average height of __________.

    a. the higher high waters
    b. the lower high waters
    c. the lower of the two daily tides
    d. all high waters
118: What describes an accurate position that is NOT based on any prior position?

    a. Dead-reckoning position
    b. Estimated position
    c. Fix
    d. Running fix
119: While proceeding along the Mediterranean coast of Spain, you sight the black and yellow buoy shown. Your course is 039°T, and the buoy bears 053°T. What action should you take? (D020NG )

    a. Alter course to 053°T and pass the buoy close aboard on either side
    b. Alter course to 060° and ensure that the bearings decrease
    c. Maintain course and ensure that the bearings increase
    d. Alter course towards the buoy and leave the buoy well clear on either side
120: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be the maximum CPA?

    a. 72 miles
    b. 78 miles
    c. 83 miles
    d. 89 miles
121: A safe water mark may be __________.

    a. vertically striped
    b. spherical
    c. showing a white light
    d. All of the above
122: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?

    a. 11250
    b. 18411
    c. 21228
    d. 17136
123: If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the __________.

    a. skip zone
    b. blackout zone
    c. diffraction zone
    d. shadow zone
124: An electronic depth finder operates on the principle that __________.

    a. radio signals reflect from a solid surface
    b. sound waves travel at a constant speed through water
    c. radar signals travel at a constant speed through water
    d. pressure increases with depth
125: The GMT is 0445 and your zone description is +1. Your zone time is __________.

    a. 0445
    b. 0345
    c. 0545
    d. 1545
126: A katabatic wind blows __________.

    a. up an incline due to surface heating
    b. in a circular pattern
    c. down an incline due to cooling of the air
    d. horizontally between a high and a low pressure area
127: Mean low water is the average height of __________.

    a. the surface of the sea
    b. high waters and low waters
    c. all low waters
    d. the lower of the two daily low tides
128: A position obtained by applying only your vessel's course and speed to a known position is a __________.

    a. dead-reckoning position
    b. fix
    c. probable position
    d. running fix
129: In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.

    a. the equator to the elevated pole
    b. your horizon to your zenith
    c. your zenith to the elevated pole
    d. the geographical position of the Sun to the elevated pole
130: The distance between the surface of the water and the tidal datum is the __________.

    a. range of tide
    b. height of tide
    c. charted depth
    d. actual water depth
131: A vertically-striped buoy may be __________.

    a. striped black and green
    b. striped black and yellow
    c. lighted with a red light
    d. lighted with a white light
132: The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.

    a. the equator
    b. latitude 45°
    c. the poles
    d. all latitudes
133: The line connecting the Loran-C master station with a secondary station is called the __________.

    a. focus line
    b. base line
    c. side line
    d. center line
134: The recording fathometer produces a graphic record of the __________.

    a. bottom contour only up to depths of 100 fathoms
    b. depth underneath the keel against a time base
    c. contour of the bottom against a distance base
    d. depth of water against a distance base
135: The standard meridian for the time zone +1 is __________.

    a. 0°
    b. 7 1/2°W
    c. 15°W
    d. 7 1/2°E
135: The standard meridian for the time zone +1 is __________.

    a. 0°
    b. 7 1/2°W
    c. 15°W
    d. 7 1/2°E
136: Which Beaufort force indicates a wind speed of 65 knots?

    a. Beaufort force 0
    b. Beaufort force 6.5
    c. Beaufort force 12
    d. Beaufort force 15
137: Priming of the tides occurs __________.

    a. at times of new and full Moon
    b. when the Earth, Moon, and Sun are lying approximately on the same line
    c. when the Moon is between first quarter and full and between third quarter and new
    d. when the Moon is between new and first quarter and between full and third quarter
138: The path that a vessel is expected to follow, represented on a chart by a line drawn from the point of departure to the point of arrival, is the __________.

    a. DR plot
    b. track line
    c. heading
    d. estimated course
139: What is the geographic longitude of a body whose GHA is 215°15'?

    a. 35°15'W
    b. 35°15'E
    c. 144°45'E
    d. 144°45'W
140: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

    a. 76 miles
    b. 69 miles
    c. 63 miles
    d. 56 miles
141: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?

    a. 12h 30m
    b. 12h 44m
    c. 12h 58m
    d. 13h 22m
142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?

    a. Approach charts
    b. General charts
    c. Sailing charts
    d. Coastal charts
143: Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?

    a. Isophase
    b. Quick flashing
    c. Long flashing
    d. Group Flashing (2 + 1)
144: In modern fathometers the sonic or ultrasonic sound waves are produced electrically by means of a(n) __________.

    a. transmitter
    b. transducer
    c. transceiver
    d. amplifier
145: The standard time meridian for zone description -1 is __________.

    a. 0°
    b. 7 1/2°W
    c. 7 1/2°E
    d. 15°E
146: What change in the wind direction could be expected at position "D" if the low were moving northeasterly? (D049NG )

    a. Veering to the west
    b. Backing to the north
    c. Veering to the north
    d. Backing to the east
147: Which statement is TRUE concerning equatorial tides?

    a. They occur when the Sun is at minimum declination north or south.
    b. They occur when the Moon is at maximum declination north or south.
    c. The difference in height between consecutive high or low tides is at a minimum.
    d. They are used as the basis for the vulgar establishment of the port.
148: When possible, a DR plot should always be started from where?

    a. Any position
    b. A known position
    c. An assumed position
    d. None of the above
149: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?

    a. 339°
    b. 333°
    c. 326°
    d. 320°
150: An alternating light __________.

    a. shows a light with varying lengths of the lighted period
    b. shows a light that changes color
    c. marks an alternate lesser-used channel
    d. is used as a replacement for another light
151: Under the U.S. Aids to Navigation System, spherical buoys may be __________.

    a. numbered
    b. lettered
    c. lighted
    d. All of the above
152: A chart with a natural scale of 1:160,000 is classified as a __________.

    a. sailing chart
    b. general chart
    c. coast chart
    d. harbor chart
153: The line extending beyond the stations at A and B is referred to as the __________. (D004NG )

    a. slave line
    b. zero line
    c. baseline extension
    d. centerline
154: Which factor has the greatest effect on the amount of gain required to obtain a fathometer reading?

    a. Salinity of water
    b. Temperature of water
    c. Atmospheric pressure
    d. Type of bottom
155: The velocity of the current in large coastal harbors is __________.

    a. predicted in Tidal Current Tables
    b. unpredictable
    c. generally constant
    d. generally too weak to be of concern
156: In reading a weather map, closely spaced pressure gradient lines would indicate __________.

    a. high winds
    b. high overcast clouds
    c. calm or light winds
    d. fog or steady rain
157: Tropic tides are caused by the __________.

    a. Moon being at its maximum declination
    b. Moon crossing the equator
    c. Sun and Moon both being near 0° declination
    d. Moon being at perigee
158: Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be __________.

    a. with you at 10 knots
    b. against you at 10 knots
    c. slack
    d. with you at 2 knots
159: The apparent wind can be zero when the true wind is from __________.

    a. ahead and equal to the ship's speed
    b. astern and equal to the ship's speed
    c. ahead and equal to twice the ship's speed
    d. astern and equal to twice the ship's speed
159: The apparent wind can be zero when the true wind is from __________.

    a. ahead and equal to the ship's speed
    b. astern and equal to the ship's speed
    c. ahead and equal to twice the ship's speed
    d. astern and equal to twice the ship's speed
161: How is a safe water mark, that can be passed close aboard on either side, painted and lighted?

    a. Black and white stripes with an interrupted quick flashing light
    b. Black and red stripes with a Morse (A) light
    c. Black and red stripes with an interrupted quick flashing light
    d. Red and white stripes with a Morse (A) light
162: A chart with a scale of 1:80,000 would fall into the category of a __________.

    a. sailing chart
    b. general chart
    c. coastal chart
    d. harbor chart
163: How many fixed objects are needed to plot a running fix?

    a. None
    b. One
    c. Two
    d. Three
164: The part of a sextant mounted directly over the pivot of the index arm is the __________.

    a. index mirror
    b. horizon glass
    c. micrometer drum
    d. telescope
165: On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?

    a. It is 1000, 5 July.
    b. It is 1000, 6 July.
    c. It is 2200, 7 July.
    d. It is 1000, 7 July.
166: On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________.

    a. geostrophic winds
    b. doldrums
    c. horse latitudes
    d. prevailing westerlies
167: When the Moon's declination is maximum north, which of the following will occur?

    a. Mixed-type tides
    b. Higher high tides and lower low tides
    c. Tropic tides
    d. Equatorial tides
168: Your vessel is making way through the water at a speed of 12 knots. Your vessel traveled 30 nautical miles in 2 hours 20 minutes. What current are you experiencing?

    a. A following current at 2.0 knots
    b. A head current of 2.0 knots
    c. A following current of 0.9 knot
    d. A head current of 0.9 knot
169: You want to transit Hell Gate on 23 July 1983. What is the period of time around the AM (ZD +4) slack before ebb when the current will be less than 0.5 knot?

    a. 0939 to 0957
    b. 0943 to 0953
    c. 0844 to 0852
    d. 0348 to 0356
170: Which of the buoy symbols in illustration D032NG indicates a safe water mark?

    a. D
    b. C
    c. B
    d. A
171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

    a. safe water
    b. a fish trap area
    c. a hazard to navigation
    d. a bifurcation in the channel
171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

    a. safe water
    b. a fish trap area
    c. a hazard to navigation
    d. a bifurcation in the channel
172: A chart with a scale of 1:45,000 is a __________.

    a. harbor chart
    b. coast chart
    c. general chart
    d. sailing chart
174: The position labeled D is a(n) __________. (D051NG )

    a. fix
    b. running fix
    c. estimated position
    d. dead reckoning position
175: On 5 July 1981, at 1200 zone time, you cross the 180th meridian steaming westward. What is your local time?

    a. It is 1200, 4 July.
    b. It is 1200, 5 July.
    c. It is 1200, 6 July.
    d. It is 2400, 6 July.
176: Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?

    a. Subpolar easterlies
    b. Northeast trades
    c. Prevailing westerlies
    d. Dominant southwesterly flow
177: How many high waters usually occur each day on the East Coast of the United States?

    a. One
    b. Two
    c. Three
    d. Four
178: You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?

    a. Head your vessel slightly to the right
    b. Head your vessel slightly to the left
    c. Decrease your speed
    d. Increase your speed
179: You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) __________.

    a. must come right to get on the range
    b. course is in error
    c. compass has some easterly error
    d. are being affected by a southerly current
180: What is a lighted safe water mark fitted with to aid in its identification?

    a. A spherical topmark
    b. Red and white retroreflective material
    c. A sequential number
    d. A red and white octagon
181: Which navigational mark may only be lettered?

    a. An unlighted, green, can buoy
    b. A spherical buoy
    c. A red buoy
    d. A port side day-shape
182: The scale on a chart is given as 1:5,000,000. This means that __________.

    a. 1 inch is equal to 5,000 inches on the Earth's surface
    b. 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface
    c. 1 inch is equal to 5,000,000 inches on the Earth's surface
    d. 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface
184: When the index and horizon mirrors of a properly adjusted sextant are at an angle of 45° to each other, the arc reads __________.

    a. 22 1/2°
    b. 45°
    c. 60°
    d. 90°
185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?

    a. 45°00'W
    b. 52°30'W
    c. 60°00'W
    d. 67°30'W
186: In the doldrums you will NOT have __________.

    a. high relative humidity
    b. frequent showers and thunderstorms
    c. steep pressure gradients
    d. frequent calms
187: Which statement is TRUE concerning apogean tides?

    a. They occur only at quadrature.
    b. They occur when the Moon is nearest the Earth.
    c. They cause diurnal tides to become mixed.
    d. They have a decreased range from normal.
188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.

    a. 286°
    b. 254°
    c. 106°
    d. 016°
189: While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?

    a. 060°T
    b. 090°T
    c. 150°T
    d. 240°T
190: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

    a. steeper waves, closer together
    b. long swells
    c. cirrus clouds
    d. smoother seas and warmer water
191: Safe water buoys may show ONLY __________.

    a. flashing red lights
    b. flashing green lights
    c. white lights
    d. yellow lights
191: Safe water buoys may show ONLY __________.

    a. flashing red lights
    b. flashing green lights
    c. white lights
    d. yellow lights
192: The description "Racon" beside an illustration on a chart would mean a __________.

    a. radar conspicuous beacon
    b. circular radio beacon
    c. radar transponder beacon
    d. radar calibration beacon
193: In using Loran-C, skywave reception gives greater range but is __________.

    a. only accurate during daylight hours
    b. much less accurate
    c. only accurate at twilight
    d. more accurate than using ground waves
194: The horizon glass of a sextant is __________.

    a. silvered on its half nearer the frame
    b. mounted on the index arm
    c. between the horizon and the shade glasses
    d. All of the above
195: The equation of time is 8m 00s. The mean Sun is ahead of the apparent Sun. If you are 2°W of the central meridian of your time zone, when will the apparent Sun cross your meridian?

    a. 1216
    b. 1208
    c. 1200
    d. 1152
196: The area of strong westerly winds occurring between 40°S and 60°S latitude is called the __________.

    a. polar easterlies
    b. prevailing westerlies
    c. roaring forties
    d. jet streams
197: Chart legends printed in capital letters show that the associated landmark is __________.

    a. conspicuous
    b. inconspicuous
    c. a government facility or station
    d. a radio transmitter
198: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the time to intercept if you make 9 knots?

    a. 7h 44m
    b. 7h 12m
    c. 6h 43m
    d. 6h 08m
199: Civil twilight occurs at 0558 zone time on 30 December 1981. Your DR position at that time is LAT 15°02'N, LONG 46°02'W. Which statement concerning the planets available for morning sights is TRUE?

    a. At 0558, Mars can be used for an ex-meridian observation.
    b. Venus, Jupiter, and Mars sights will yield a good three line fix.
    c. Saturn will be near the prime vertical.
    d. Venus will be visible low in the western sky.
200: When navigating using GPS, what is an indicator of the geometry of the satellites that your receiver is locked onto?

    a. Horizontal Dilution of Precision
    b. Selective Availability
    c. Doppler Shifting
    d. Precision Coding
201: What is a lighted safe water mark fitted with to aid in its identification?

    a. Red and white retroreflective material
    b. A spherical topmark
    c. A sequential number
    d. A red and white octagon
202: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

    a. radio beacon
    b. lighted buoy
    c. prohibited area
    d. 5-fathom curve
203: In any Loran-C chain, there are three or more stations transmitting pulses which radiate in all directions. One of the stations is the master station, and the others in the chain are the __________.

    a. radio stations
    b. secondary stations
    c. monitor stations
    d. pulse stations
204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is __________.

    a. 20°
    b. 30°
    c. 40°
    d. 60°
205: The difference between local apparent time (LAT) and local mean time (LMT) is indicated by the __________.

    a. equation of time
    b. difference of longitude between the local and central meridian in time units
    c. longitude in time units
    d. zone description
206: The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________.

    a. doldrums
    b. westerlies
    c. trades
    d. easterlies
207: An important lunar cycle affecting the tidal cycle is called the nodal period. How long is this cycle?

    a. 16 days
    b. 18 days
    c. 6 years
    d. 19 years
208: The moon is full and at perigee on 20 January 1983. What is the maximum current you could expect at 2350 (ZD +5) at Nantucket Shoals?

    a. 0.5 knot
    b. 0.7 knot
    c. 0.8 knot
    d. 1.0 knot
209: The West Wind Drift is located __________.

    a. near 60°S
    b. on each side of the Equatorial Current
    c. in the North Atlantic between Greenland and Europe
    d. in the South Pacific near 5°S
210: The position labeled C is a(n) __________. (D051NG )

    a. fix
    b. running fix
    c. estimated position
    d. dead reckoning position
211: The light rhythm of Morse (A) is shown on __________.

    a. preferred-channel buoys
    b. starboard- or port-side buoys
    c. special marks
    d. safe water buoys
212: Which aid is NOT marked on a chart with a magenta circle?

    a. Radar station
    b. Radar transponder beacon
    c. Radio beacon
    d. Aero light
213: When using GPS, how many theoretical position lines are required for a two-dimensional fix?

    a. 1
    b. 2
    c. 3
    d. 4
214: A sextant having an index error that is "on the arc" has a __________.

    a. positive correction
    b. dip error
    c. negative correction
    d. semidiameter error
215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?

    a. 1148
    b. 1200
    c. 1212
    d. It cannot be determined from the information given.
216: The prevailing winds in the band of latitude from approximately 5°N to 30°N are the __________.

    a. prevailing westerlies
    b. northeast trade winds
    c. southeast trade winds
    d. doldrums
217: In some parts of the world there is often a slight fall in tide during the middle of the high water period. The effect is to create a longer period of stand at higher water. This special feature is called a(n) __________.

    a. apogean tide
    b. double high water
    c. perigean tide
    d. bore
218: Lines of position may be __________.

    a. hyperbolas
    b. straight lines
    c. arcs
    d. All of the above
219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current?

    a. Mile 52
    b. New Castle
    c. Marcus Hook
    d. Billingsport
220: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile east of your DR. Which statement is TRUE?

    a. The current is westerly at 0.5 knot.
    b. You must increase speed to compensate for the current.
    c. The current cannot be determined.
    d. The drift is 0.25 knot.
221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of __________.

    a. group occulting
    b. Morse (A)
    c. interrupted quick flashing
    d. quick flashing
222: Which statement concerning the illustration is correct? (Soundings and heights are in meters) (D010NG )

    a. Maury Lightship swings about her anchor on a circle with a 21-meter diameter.
    b. The position of the lightship is indicated by the center of the star on the symbol's mast.
    c. There is a 12 meter deep hole inside the 5-meter curve just west of Beito Island.
    d. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum.
223: In the Loran-C configuration shown, the stations located at X, Y, and Z are called __________. (D003NG )

    a. repeater stations
    b. secondary stations
    c. composite stations
    d. alternate stations
224: A sextant having an index error that is "off the arc" has a __________.

    a. positive correction
    b. dip error
    c. negative correction
    d. semidiameter error
225: The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at __________.

    a. 11-51-20 ZT
    b. 12-00-00 ZT
    c. 12-04-20 ZT
    d. 12-08-40 ZT
226: What winds blow towards the equator from the area about 30° north?

    a. Prevailing westerlies
    b. Roaring thirties
    c. Equatorial flow
    d. Northeast trades
227: The class of tide that prevails in the greatest number of important harbors on the Atlantic Coast is __________.

    a. interval
    b. mixed
    c. diurnal
    d. semidiurnal
228: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a convergence line? (D042NG )

    a. L
    b. F
    c. M
    d. Q
229: The shoreline on charts generally represents the mean __________.

    a. high water line
    b. low water line
    c. low water spring line
    d. tide level
230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.

    a. no LORAN-C signal is received
    b. only ground waves are received
    c. only skywaves are received
    d. both ground waves and skywaves are received
231: You are outbound in a buoyed channel on course 015°T. You sight a white light showing a Morse (A) characteristic bearing 359° relative. For safety, you should __________.

    a. change course to 359°T to pass near to the buoy
    b. stay in the channel and leave the buoy to port
    c. alter course to 000°T and leave the buoy well clear to starboard
    d. check the chart to see where the marked danger lies in relation to the buoy
232: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

    a. Maury lightship is visible for 17 miles.
    b. The bottom to the south-southeast of the lightship is soft coral.
    c. There is a 12-meter deep west of Beito Island and inside the 5-meter line.
    d. There is a dangerous eddy southeast of Beito Island.
234: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

    a. exceed the predicted velocities
    b. become reversing currents
    c. have either a double ebb or a double flood
    d. become weak and variable
235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.

    a. zone time
    b. sunrise
    c. time of local apparent noon
    d. local mean time
236: The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.

    a. doldrums
    b. horse latitudes
    c. trade winds
    d. prevailing westerlies
237: Neap tides occur when the __________.

    a. Moon is in its first quarter and third quarter phases
    b. Sun and Moon are on opposite sides of the Earth
    c. Moon's declination is maximum and opposite to that of the Sun
    d. Sun and Moon are in conjunction
238: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1430 and turn for 11 knots, at what point will you lose the ebb current?

    a. New Castle
    b. Liston Pt.
    c. Arnold Pt.
    d. Ship John Shoal Lt.
239: As you enter a channel from seaward in a U.S. port, the numbers on the starboard side buoys __________.

    a. decrease and the buoys are black
    b. increase and the buoys are green
    c. decrease and the buoys are red
    d. increase and the buoys are red
240: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

    a. at high water
    b. when there is a following current
    c. at slack water
    d. at flood
241: A spherical buoy may be __________.

    a. numbered
    b. lettered
    c. green
    d. red
242: The difference between the heights of low and high tide is the __________.

    a. range
    b. period
    c. depth
    d. distance
243: The loran lines drawn on navigation charts represent __________.

    a. ground waves
    b. skywaves
    c. either ground waves or skywaves interchangeably
    d. an average between ground wave and skywave positions
244: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

    a. One hour after the predicted time
    b. At the predicted time
    c. 30 minutes before flood, one hour after an ebb
    d. 30 minutes before the predicted time
245: Yesterday you took a time tick using the 1200 GMT broadcast, and the chronometer read 11h 59m 59s. Today at the 1200 GMT time tick the chronometer read 00h 00m 01s. What is the chronometer error?

    a. Gaining 2 seconds
    b. Losing 2 seconds
    c. Fast 2 seconds
    d. Fast 1 second
246: The consistent winds blowing from the horse latitudes to the doldrums are called the __________.

    a. prevailing westerlies
    b. polar easterlies
    c. trade winds
    d. roaring forties
247: Neap tides occur __________.

    a. at the start of spring, when the Sun is nearly over the equator
    b. only when the Sun and Moon are on the same sides of the Earth and are nearly in line
    c. when the Sun and Moon are at approximately 90° to each other, as seen from the Earth
    d. when the Sun, Moon, and Earth are nearly in line, regardless of alignment order
248: What is the index error of sextant A in illustration D050NG? (D050NG )

    a. 0° 10' off the arc
    b. 0° 10' on the arc
    c. 3° 00' off the arc
    d. 4° 20' off the arc
249: When using GPS, how many theoretical position lines are required for a three-dimensional fix that takes into account altitude?

    a. 1
    b. 2
    c. 3
    d. 4
250: Weather systems in the middle latitudes generally travel from __________.

    a. west to east
    b. east to west
    c. north to south
    d. None of the above
251: A mid-channel buoy, if lighted, will show a __________.

    a. fixed red light
    b. Morse (A) white light
    c. green light
    d. flashing red light
252: A large automated navigational buoy, such as those that have replaced some lightships, would be shown on a chart by which symbol? (D015NG )

    a. A
    b. B
    c. C
    d. D
253: Loran-C is which type of system?

    a. Reflected electron
    b. Electrical radiation
    c. Quarterpoint electrical navigation
    d. Hyperbolic radio navigation
254: The range of tide is the __________.

    a. difference between the heights of high and low tide
    b. distance the tide moves out from the shore
    c. duration of time between high and low tide
    d. maximum depth of the water at high tide
255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?

    a. You are in -12 time zone.
    b. It is 1700, March 18.
    c. It is 0500, March 16.
    d. It is 0500, March 18.
256: The belt of light and variable winds between the westerly wind belt and the northeast trade winds is called the __________.

    a. subtropical high pressure belt
    b. intertropical convergence zone
    c. doldrum belt
    d. polar frontal zone
257: Spring tides occur __________.

    a. at the start of spring, when the Sun is nearly over the equator
    b. only when the Sun and Moon are on the same side of the Earth and nearly in line
    c. when the Sun and Moon are at approximately 90° to each other as seen from the Earth
    d. when the Sun, Moon, and Earth are nearly in line, in any order
258: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

    a. cirrus clouds
    b. long swells
    c. smoother seas and warmer water
    d. steeper waves, closer together
259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )

    a. convergence zone
    b. squall line
    c. convergence line
    d. weather boundary
260: The National Ocean Service publishes the __________.

    a. Light Lists
    b. Coast Pilots
    c. pilot charts
    d. Sailing Directions
261: You are heading out to sea in a buoyed channel and see a quick-flashing green light on a buoy ahead of you. In U.S. waters, you should leave the buoy __________.

    a. well clear on either side
    b. about 50 yards off on either side
    c. to port
    d. to starboard
262: Which of the buoy symbols shown indicates a safe water mark? (D032NG )

    a. A
    b. B
    c. C
    d. D
263: Loran-C uses the multiple pulse system because __________.

    a. less signal energy is necessary for receiver operation
    b. more signal energy is available at the receiver
    c. it significantly increases the peak power
    d. it increases the signal capacity
264: Which of the four adjustable errors in the sextant is the principle cause of index error?

    a. Telescope not being parallel to the frame
    b. Index mirror and horizon glass not being parallel
    c. Index mirror not being perpendicular to the frame
    d. Horizon glass not being perpendicular to the frame
265: It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE?

    a. It is afternoon at Greenwich.
    b. It is midnight at 126°E longitude.
    c. The observer is in time zone -4.
    d. All of the above are true.
266: The horse latitudes are characterized by __________.

    a. weak pressure gradients and light, variable winds
    b. the formation of typhoons or hurricanes in certain seasons
    c. steady winds in one direction for six months followed by wind reversal for the next six months
    d. steady winds generally from the southeast in the Southern Hemisphere
267: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

    a. Alter course to the right to 309°T or more to bring the range in line.
    b. Alter course to the left until the range closes, then steer to the left of 306°T.
    c. Alter course to the left to close the range, then alter course to 309°T.
    d. Maintain course as it is normal for the range to open as you get close.
268: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "L" represents a __________. (D042NG )

    a. convergence line
    b. maritime air mass
    c. warm front
    d. convergence zone
269: The wind at Frying Pan shoals has been south-southwesterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 232° at 0.8 knot. What current should you expect?

    a. 065° at 1.2 knots
    b. 092° at 1.3 knots
    c. 139° at 0.6 knot
    d. 224° at 0.4 knot
270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )

    a. drop the anchor immediately as the range lights mark an area free of obstructions
    b. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor
    c. ensure your ship will NOT block the channel or obstruct the range while at anchor
    d. NOT drop the anchor until the lights are in line
271: Your vessel is leaving New York harbor in dense fog. As the vessel slowly proceeds toward sea, you sight a green can buoy on the starboard bow. Which action should you take?

    a. Turn hard right to get back into the channel.
    b. Pass the buoy close to, leaving it to your port.
    c. Stop and fix your position.
    d. Stand on, leaving the buoy to your starboard.
272: What does the symbol shown indicate on a chart? (D033NG )

    a. A sunken vessel marked by a buoy
    b. A safe water beacon
    c. A red and white can buoy
    d. A can buoy with a rotating white light
273: Loran-C is which type of navigation system?

    a. Hyperbolic, long-range navigation system
    b. Short-range electronic
    c. Long-range, high frequency navigation system
    d. Long-range, with a frequency of 1950 kHz
274: Which of the four adjustable errors in the sextant causes side error?

    a. Horizon glass not being perpendicular to the frame
    b. Index mirror not being perpendicular to the frame
    c. Telescope not being parallel to the frame
    d. Elliptical centering error
275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )

    a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum.
    b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island.
    c. The position of the lightship is indicated by the center of the star on the symbol's mast.
    d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter.
276: The region of high pressure extending around the Earth at about 35°N latitude is called the __________.

    a. prevailing westerlies
    b. horse latitudes
    c. troposphere
    d. doldrums
277: Your vessel goes aground in soft mud. You would have the best chance of refloating it on the next tide if it grounded at __________.

    a. low water neap
    b. low water spring
    c. high water neap
    d. high water spring
278: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?

    a. 84 miles
    b. 79 miles
    c. 74 miles
    d. 66 miles
279: As a vessel changes course to starboard, the compass card in a magnetic compass __________.

    a. remains aligned with compass north
    b. also turns to starboard
    c. first turns to starboard then counterclockwise to port
    d. turns counterclockwise to port
280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

    a. the port side of the channel
    b. safe water
    c. a hazard to navigation
    d. the position of underwater cables
281: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.

    a. white light
    b. red light
    c. green light
    d. light characteristic of Morse (A)
282: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?

    a. It is visible 10 miles.
    b. Its distinguishing number is "19M".
    c. It has a radar reflector.
    d. None of the above
283: Loran-C operates on a single frequency centered on __________.

    a. 100 kHz
    b. 500 kHz
    c. 1,850 kHz
    d. 1,950 kHz
284: The marine sextant is subject to seven different types of errors, four of which may be corrected by the navigator. An error NOT correctable by the navigator is __________.

    a. index error
    b. prismatic error
    c. perpendicularity of the horizon glass
    d. perpendicularity of the index mirror
285: The apparent wind is zero when the true wind is __________.

    a. zero
    b. from ahead and equal to the ship's speed
    c. from astern and equal to the ship's speed
    d. from astern and is twice the ship's speed
286: On the pole side of the trade wind belt, there is an area of high pressure with weak pressure gradients and light, variable winds. This area is called the __________.

    a. prevailing westerlies
    b. geostrophic winds
    c. doldrums
    d. horse latitudes
287: The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.

    a. between -.7 and +.5 feet
    b. between 1.9 and 3.2 feet
    c. 4.1 feet
    d. 1.2 feet
288: When using a radar in a unstabilized mode, fixes are determined most easily from __________.

    a. center bearings
    b. tangent bearings
    c. ranges
    d. objects that are close aboard
289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.

    a. running fix
    b. dead-reckoning position
    c. fix
    d. estimated position
290: The true wind is from 330°T, speed 6 knots. You want the apparent wind to be 30 knots from 10° on your port bow. To what course and speed must you change?

    a. Cn 240°, 28.0 knots
    b. Cn 270°, 28.0 knots
    c. Cn 180°, 30.0 knots
    d. Cn 090°, 32.5 knots
291: A buoy marking a wreck will show a(n) __________.

    a. white light FL (2) and a topmark of 2 black spheres
    b. occulting green light and may be lettered
    c. yellow light and will be numbered
    d. continuous quick white light and may be numbered
292: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess?

    a. It is visible two nautical miles.
    b. Its distinguishing number is "19M".
    c. It has a red light.
    d. It flashes once every ten seconds.
293: The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of __________.

    a. high frequency pulses
    b. combinations of high and low frequency pulses
    c. the same frequency for all stations in a chain
    d. varied long and short pulses
294: What is a nonadjustable error of the sextant?

    a. Prismatic error
    b. Index error
    c. Side error
    d. Error of collimation
295: The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.

    a. right ascension
    b. meridian angle
    c. SHA of the observer
    d. zenith distance
296: The wind flow from the horse latitudes to the doldrums is deflected due to __________.

    a. Coriolis force
    b. the mid-latitude, semi-permanent high
    c. differing atmospheric pressures
    d. the prevailing westerlies
297: The tides in Boston Harbor generally __________.

    a. are diurnal in nature
    b. have their variations caused by the changing declination of the Moon
    c. have a greater range than the tides in Gulf Coast ports
    d. All of the above
298: A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?

    a. 7°W
    b. 73°E
    c. 73°W
    d. 173°W
299: Steady precipitation is typical of __________.

    a. coming cold weather conditions
    b. a warm front weather condition
    c. high pressure conditions
    d. scattered cumulus clouds
300: Which of the symbols shown represents a warm front? (D018NG )

    a. A
    b. B
    c. C
    d. D
301: In the U.S. Aids to Navigation System, lateral aids as seen entering from seaward will display lights with which characteristic?

    a. Flashing
    b. Occulting
    c. Quick Flashing
    d. All of the above
302: Which symbol represents a 20-fathom curve?

    a. -..-..-..-..-
    b. - - - - - - - -
    c. - - . - - . - - . - - .
    d. - - - - - - - -
304: In order to remove index error from a sextant, you should adjust the __________.

    a. index mirror to make it parallel to the horizon glass with the index set at zero
    b. horizon glass to make it parallel to the index mirror with the index set at zero
    c. horizon glass to make it parallel to the sextant frame
    d. telescope to make it perpendicular to the sextant frame
305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

    a. red can buoy
    b. black can buoy
    c. red conical buoy
    d. black conical buoy
306: Weather conditions in the middle latitudes generally move __________.

    a. eastward
    b. westward
    c. northward
    d. southward
307: The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.

    a. 60°W
    b. 75°W
    c. 90°W
    d. 105°W
308: The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323° at 0.6 knot. What current should you expect?

    a. 001° at 0.7 knot
    b. 018° at 0.4 knot
    c. 052° at 0.6 knot
    d. 089° at 0.9 knot
309: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. What course should you steer at 12 knots to have the maximum CPA?

    a. 332°
    b. 339°
    c. 346°
    d. 357°
310: Which sextant shown has an index error of 3'30" off the arc? (D050NG )

    a. A
    b. B
    c. C
    d. D
311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.

    a. the vessel's starboard side
    b. the vessel's port side
    c. either side close aboard
    d. either side well clear
311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.

    a. the vessel's starboard side
    b. the vessel's port side
    c. either side close aboard
    d. either side well clear
312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.

    a. 11.5 fathoms
    b. 12.6 fathoms
    c. 69.0 feet
    d. 78.6 feet
313: The Loran-C receiver __________.

    a. is not affected by interference
    b. can be used at any distance with accuracy
    c. can be affected by interference
    d. is reliable only from sunrise to sunset
314: Which of these sextant errors is nonadjustable?

    a. Prismatic error
    b. Graduation error
    c. Centering error
    d. All of the above
315: Which statement about the time diagram shown DO08NG is TRUE?

    a. You are in west longitude.
    b. Your date is ahead of Greenwich.
    c. The meridian angle of the Sun is east.
    d. The GHA of the Sun is less than 180°.
316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.

    a. northeast
    b. west-southwest
    c. northwest
    d. south-southeast
317: The time meridian used for tide computations in New York Harbor is __________.

    a. 52°30'W
    b. 60°00'W
    c. 75°00'W
    d. 82°30'W
318: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.

    a. distance to the next port
    b. speed of the vessel over the ground or through the water
    c. time of the next navigational satellite pass
    d. None of the above
319: The Illustration shows the symbols used by radio facsimile weather charts. The symbol indicated at letter "F" represents a __________. (D042NG )

    a. maritime air mass
    b. weather boundary
    c. convergence zone
    d. squall line
320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.

    a. red
    b. black
    c. purple
    d. yellow
321: Which buoy may be even numbered?

    a. Mid-channel buoy
    b. Unlighted nun buoy
    c. Lighted green buoy
    d. All of the above
323: The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as __________.

    a. gains are made over the signal path
    b. a result of variation in propagation conditions
    c. the frequency of the pulses increases
    d. the stations shift pulses
324: Index error of a sextant is primarily caused by __________.

    a. improperly correcting the other errors in a sextant
    b. the horizon glass not being parallel to the horizon mirror
    c. the horizon glass not being parallel to the index mirror
    d. human error in taking a celestial observation
325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'?

    a. 30°30'E
    b. 59°30'W
    c. 120°30'W
    d. 149°30'E
326: You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the __________.

    a. north
    b. south
    c. east
    d. west
327: When daylight savings time is kept the times of tide and current calculations must be adjusted. One way of doing this is to __________.

    a. subtract one hour from the times listed under the reference stations
    b. add one hour to the times listed under the reference stations
    c. apply no correction, as the times in the reference stations are adjusted for daylight savings time
    d. add 15° to the standard meridian when calculating the time difference
328: The direction of prevailing winds in the Northern hemisphere is caused by the __________.

    a. magnetic field at the North Pole
    b. Gulf Stream
    c. Earth's rotation
    d. Arctic cold fronts
329: The symbols shown are used on radio facsimile weather charts. Which symbol indicates a weather boundary? (D042NG )

    a. I
    b. H
    c. G
    d. F
330: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

    a. 90°
    b. 30°
    c. 45°
    d. 60°
331: What indicates a buoy that should be left to port when entering from seaward? (U.S. Aids to Navigation System)

    a. White light
    b. Group flashing characteristic
    c. Nun shape
    d. Odd number
333: Loran-C stations transmit groups of pulses at specific times. The time interval between transmissions from the master station is the __________.

    a. coding delay
    b. group repetition interval
    c. pulse interval
    d. phase code
334: The index error is determined by adjusting the __________.

    a. sextant frame
    b. horizon glass
    c. index mirror
    d. micrometer drum
335: What is the geographic longitude of a body whose GHA is 232°27'?

    a. 127°33'E
    b. 52°27'E
    c. 61°52'W
    d. 61°52'E
336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.

    a. ahead of you
    b. astern of you
    c. to the north
    d. to the south
336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.

    a. ahead of you
    b. astern of you
    c. to the north
    d. to the south
337: To predict the actual depth of water using the Tide Tables, the number obtained from the Tide Tables is __________.

    a. the actual depth
    b. added to or subtracted from the charted depth
    c. multiplied by the charted depth
    d. divided by the charted depth
338: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "N" represents __________. (D042NG )

    a. hail
    b. freezing rain
    c. rain
    d. snow
339: The wind at Frying Pan shoals has been north-northeasterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 355° at 0.8 knot. What current should you expect?

    a. 010° at 1.1 knots
    b. 047° at 0.3 knot
    c. 325° at 0.7 knot
    d. 279° at 1.0 knot
340: Information about the direction and velocity of rotary tidal currents is found in the __________.

    a. Mariner's Guide
    b. Nautical Almanac
    c. Tide Tables
    d. Tidal Current Tables
341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?

    a. Flashing
    b. Quick flashing
    c. Composite group flashing
    d. Equal interval (isophase)
342: A polyconic projection is based on a __________.

    a. plane tangent at one point
    b. cylinder tangent at one parallel
    c. cone tangent at one parallel
    d. series of cones tangent at selected parallels
344: A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has __________.

    a. error of perpendicularity
    b. side error
    c. prismatic error
    d. centering error
345: A navigator fixing a vessel's position by radar __________.

    a. should never use radar bearings
    b. should only use radar bearings when the range exceeds the distance to the horizon
    c. can use radar information from one object to fix the position
    d. must use information from targets forward of the beam
346: If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?

    a. East to northeast
    b. East to southeast
    c. North to northwest
    d. South to southeast
347: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates rain? (D042NG )

    a. N
    b. M
    c. I
    d. G
348: When using a radar in an unstabilized mode, fixes are determined most easily from __________.

    a. center bearings
    b. tangent bearings
    c. objects that are close aboard
    d. ranges
349: The direction of the southeast trade winds is a result of the __________.

    a. equatorial current
    b. humidity
    c. rotation of the earth
    d. change of seasons
350: When making landfall at night, the light from a powerful lighthouse may sometimes be seen before the lantern breaks the horizon. This light is called the __________.

    a. diffusion
    b. backscatter
    c. loom
    d. elevation
351: Which buoy may be odd numbered?

    a. A spherical buoy
    b. An unlighted can buoy
    c. A red buoy
    d. A yellow buoy
352: Which chart projection would be most suitable for marine surveying?

    a. Gnomonic
    b. Lambert conformal
    c. Mercator
    d. Polyconic
354: In order to remove side error from a sextant, you should adjust the __________.

    a. horizon glass to make it parallel to the horizon mirror with the index set at zero
    b. horizon glass to make it perpendicular to the index mirror with the index set at zero
    c. horizon glass to make it perpendicular to the sextant frame
    d. telescope to make it parallel to the sextant frame
355: During the month of October the Sun's declination is __________.

    a. north and increasing
    b. north and decreasing
    c. south and increasing
    d. south and decreasing
356: When facing into the wind in the Northern Hemisphere the center of low pressure lies __________.

    a. directly in front of you
    b. directly behind you
    c. to your left and behind you
    d. to your right and behind you
357: On 10 August 1983 you will dock near Days Point, Weehawken, on the Hudson River, at 1800 DST (ZD +4). The charted depth alongside the pier is 24 feet (7.3 meters). What will be the depth of water when you dock?

    a. 23.5 feet (7.1 m)
    b. 23.9 feet (7.2 m)
    c. 24.9 feet (7.5 m)
    d. 26.3 feet (8.0 m)
358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983?

    a. 015°
    b. 125°
    c. 162°
    d. 225°
359: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T, 68 miles from you. What is the time to intercept if you make 13 Knots?

    a. 6h 31m
    b. 6h 47m
    c. 7h 03m
    d. 7h 34m
360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )

    a. rain
    b. snow
    c. hail
    d. ice
360: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "M" represents __________. (D042NG )

    a. rain
    b. snow
    c. hail
    d. ice
361: As your vessel is heading southward along the east coast of the United States, you encounter a buoy showing a red flashing light. How should you pass this buoy?

    a. Pass it about 50 yards off on either side.
    b. Leave it to your starboard.
    c. Leave it to your port.
    d. Pass it well clear on either side.
362: Which statement about a simple conic chart projection is TRUE?

    a. It is an equal-area projection.
    b. It is a conformal projection.
    c. Meridians appear as curved lines.
    d. The scale is correct along any meridian.
363: Your dead reckoning position should be plotted __________.

    a. whenever an estimated position is plotted
    b. when it agrees with your loran position
    c. when coming on or going off soundings
    d. at least every hour on the hour in the open waters of the sea
364: What causes the error of collimation with regards to the four adjustments to a sextant?

    a. Telescope not parallel to the frame
    b. Personal error
    c. The frame and index mirror not perpendicular
    d. The frame and horizon glass not perpendicular
365: The Sun at a maximum declination north would be approximately at __________.

    a. aphelion
    b. perihelion
    c. autumnal equinox
    d. first point of Aries
366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.

    a. left, slightly behind him
    b. right, slightly behind him
    c. left, slightly in front of him
    d. right, slightly in front of him
367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983?

    a. 0936
    b. 0942
    c. 0951
    d. 1001
368: A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?

    a. 46°W
    b. 124°W
    c. 134°W
    d. 34°E
369: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. What course should you steer at 11 knots to have the maximum CPA?

    a. 250°
    b. 234°
    c. 227°
    d. 215 °
370: Prevailing winds between 30°N and 60°N latitude are from the __________.

    a. north
    b. south
    c. east
    d. west
371: Which buoy may be odd numbered?

    a. Mid-channel buoy
    b. Unlighted nun buoy
    c. Lighted green buoy
    d. All of the above
372: You would find the variation on a polyconic projection chart __________.

    a. on the compass rose
    b. on the mileage scale
    c. written on the chart title
    d. at each line of longitude
373: How is a navigation light on the Mississippi River identified on an Army Corps of Engineers navigation map?

    a. Name and light characteristic
    b. Name and miles from a reference point
    c. Light characteristic and miles A.H.P.
    d. None of the above
374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?

    a. Error of collimation
    b. Prismatic error
    c. Graduation error
    d. Centering error
375: If the Sun's observed altitude is 47°50', the zenith distance is __________.

    a. 42°10'
    b. 42°50'
    c. 47°50'
    d. 132°10'
376: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northeast wind the center of low pressure is located to the __________.

    a. northeast
    b. west-southwest
    c. northwest
    d. south-southeast
377: Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983.

    a. 1.4 feet (0.5 meter)
    b. 1.9 feet (0.6 meter)
    c. 2.3 feet (0.7 meter)
    d. 2.6 feet (0.8 meter)
378: A navigator fixing a vessel's position by radar __________.

    a. should never use radar bearings
    b. can use radar information from one object to fix the position
    c. should only use radar bearings when the range exceeds the distance to the horizon
    d. must use information from targets forward of the beam
379: The steady current circling the globe at about 60°S is the __________.

    a. Prevailing Westerly
    b. Sub-Polar Flow
    c. West Wind Drift
    d. Humboldt Current
380: Prevailing winds between 30°N and 60°N latitude are from the __________.

    a. east
    b. west
    c. north
    d. south
381: A nun buoy will __________.

    a. be green in color
    b. have an even number
    c. be left to port when entering from seaward
    d. be cylindrical in shape
382: Which would you consult for information about the general current circulation in the North Atlantic Ocean?

    a. Pilot chart
    b. Coast Pilot
    c. Current Table
    d. Climatological Atlas
384: Which is a nonadjustable error of the sextant?

    a. Error of perpendicularity
    b. Side error
    c. Error of collimation
    d. Centering error
385: The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.

    a. colatitude
    b. codistance
    c. zenith distance
    d. altitude
385: The difference of latitude (l) between the geographic position (GP) of a celestial body and your position, at the time of upper transit, is represented by __________.

    a. colatitude
    b. codistance
    c. zenith distance
    d. altitude
386: Your vessel is on course 180°T speed 22 knots. The apparent wind is from 70° off the port bow, speed 20 knots. The true direction and speed of the wind are __________.

    a. 45°T, 21.0 knots
    b. 51°T, 24.0 knots
    c. 58°T, 21.2 knots
    d. 64°T, 26.0 knots
388: You are underway on course 120°T and your maximum speed is 12 knots. The eye of a hurricane bears 150°T, 120 miles from your position. The hurricane is moving towards 295°T at 20 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

    a. 89 miles
    b. 96 miles
    c. 105 miles
    d. 117 miles
389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.

    a. navigable semicircle
    b. dangerous semicircle
    c. low pressure area
    d. eye of the storm
390: During the winter months, the southeast trade winds are __________.

    a. stronger than during the summer months
    b. weaker than during the summer months
    c. drier than during the summer months
    d. wetter than during the summer months
391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.

    a. a junction with the preferred channel to the left
    b. a sharp turn in the channel to the right
    c. the port side of the channel
    d. a wreck to be left on the vessel's starboard side
392: A pilot chart does NOT contain information about __________.

    a. average wind conditions
    b. tidal currents
    c. magnetic variation
    d. average limits of field ice
394: An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.

    a. mercurial barometer
    b. aneroid barometer
    c. barograph
    d. thermograph
395: If the Sun's observed altitude is 27°12', the zenith distance is __________.

    a. 62°48'
    b. 27°12'
    c. 152°48'
    d. 43°12'
396: Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?

    a. 9.0 knots
    b. 10.2 knots
    c. 11.0 knots
    d. 12.0 knots
396: Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?

    a. 9.0 knots
    b. 10.2 knots
    c. 11.0 knots
    d. 12.0 knots
397: The mean tide level at Peaks Island, ME, is __________.

    a. 1.8 feet (0.5 meters)
    b. 2.5 feet (0.8 meters)
    c. 3.2 feet (1.0 meters)
    d. 4.5 feet (1.4 meters)
398: The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the __________.

    a. ship's speed is more than the true wind velocity
    b. true wind is from dead astern
    c. true wind is on the beam
    d. true wind is from dead ahead
399: Where will you find information about the duration of slack water?

    a. American Practical Navigator
    b. Sailing Directions
    c. Tide Tables
    d. Tidal Current Tables
400: Information about the currents for the Pacific Coast of the U. S. are found in the __________.

    a. Ocean Current Tables
    b. Nautical Almanac
    c. Tide Tables
    d. Tidal Current Tables
401: You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?

    a. Alter course to port and leave the buoy to starboard.
    b. Alter course to starboard and leave the buoy to port.
    c. Alter course and leave the buoy near by on either side.
    d. Alter course and pass the buoy well-off on either side.
402: All of the following can be found on a Pilot Chart EXCEPT information concerning the __________.

    a. percentage of frequency of wave heights
    b. percentage of poor visibility conditions
    c. sea surface temperatures
    d. amounts of precipitation
404: An aneroid barometer is an instrument __________.

    a. used to measure the speed of wind
    b. in which the pressure of the air is measured
    c. that tells which direction a storm is coming from
    d. used to measure the height of waves
405: At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.

    a. 510 miles
    b. 1220 miles
    c. 2040 miles
    d. 2260 miles
406: Your vessel is on course 135°T, speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40° on the starboard bow. Determine the speed of the apparent wind.

    a. 24.2 knots
    b. 28.4 knots
    c. 32.2 knots
    d. 36.0 knots
407: What would be the height of the tide at Crisfield, MD, at 0310 DST (ZD +4) on 6 May 1983?

    a. 0.1 foot
    b. 0.5 foot
    c. 1.1 feet
    d. 1.6 feet
408: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port?

    a. 174°T
    b. 176°T
    c. 178°T
    d. 180°T
409: On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?

    a. 0700, November 2nd
    b. 0700, November 1st
    c. 2200, November 1st
    d. 2200, October 31st
410: The height of the tide at low water is 0.0 feet. The range is 9.0 feet. The duration is 06h 00m. The height of the tide 02h 12m before high water will be __________.

    a. 8.3 feet
    b. 6.3 feet
    c. 4.7 feet
    d. 2.7 feet
411: When entering from seaward, a buoy displaying a single-flashing red light would indicate __________.

    a. a junction with the preferred channel to the left
    b. a sharp turn in the channel to the right
    c. the starboard side of the channel
    d. a wreck to be left on the vessel's port side
412: If you were sailing in the North Pacific and were interested in the ice and iceberg limits, you could find this information in the __________.

    a. Pilot Chart
    b. Coast Pilot
    c. Notice to Mariners
    d. None of the above
414: The barometer is an instrument for measuring the __________.

    a. temperature
    b. relative humidity
    c. dew point
    d. atmospheric pressure
415: If the Sun's observed altitude is 54°30', what is the zenith distance?

    a. 35°30'
    b. 45°30'
    c. 12°30'
    d. 14°30'
416: A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. The direction and speed of the true wind are __________.

    a. 068°T, 30 knots
    b. 127°T, 21 knots
    c. 263°T, 42 knots
    d. 292°T, 42 knots
417: On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY?

    a. 3.3 feet
    b. 2.6 feet
    c. 2.4 feet
    d. 2.0 feet
418: In most cases, the direction of the apparent wind lies between the bow and __________.

    a. the direction of the true wind
    b. true north
    c. the beam on the windward side
    d. the beam on the lee side
419: The ocean bottom that extends from the shoreline out to an area where there is a marked change in slope to a greater depth is the __________.

    a. abyssal plain
    b. continental shelf
    c. borderland
    d. offshore terrace
420: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

    a. Alter course to the left until the range closes then steer to the left of 306°T.
    b. Maintain course as it is normal for the range to open as you get close.
    c. Alter course to the left to close the range, then alter course to 309°T.
    d. Alter course to the right to 309°T or more to bring the range in line.
421: Daylight savings time is a form of zone time that adopts the time __________.

    a. one zone to the west
    b. one zone to the east
    c. two zones to the west
    d. two zones to the east
422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?

    a. Sailing Charts of the Caribbean Sea
    b. Pilot Charts of the North Atlantic
    c. Light Lists, Atlantic and Gulf Coast
    d. Tidal Current Tables
424: For an accurate barometer check, you would __________.

    a. check it with a barometer on another vessel
    b. take readings from several barometers and average them
    c. check it with the barometer at the ship chandlery
    d. check it against radio or National Weather Service reports of the immediate vicinity
425: 90° - Ho = __________.

    a. sextant altitude
    b. co-latitude
    c. LHA
    d. zenith distance
426: The wind speed and direction observed from a moving vessel is known as __________.

    a. coordinate wind
    b. true wind
    c. apparent wind
    d. anemometer wind
427: On 23 March 1983, at Kingston Point, NY, what is the earliest time after 1700 EST (ZD +5) that the predicted tide will be +2.0 feet?

    a. 1730
    b. 1800
    c. 1854
    d. 2030
428: A buoy bears 178°T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to starboard?

    a. 174°T
    b. 176°T
    c. 178°T
    d. 180°T
429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?

    a. 127°E
    b. 53°E
    c. 27°E
    d. 27°W
430: The southeast trade winds actually blow toward the __________.

    a. southeast
    b. south
    c. east
    d. northwest
431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.

    a. the shape of an unlighted buoy
    b. the light color of a lighted buoy
    c. the color of the topmost band
    d. whether the number is odd or even
432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.

    a. the meridian through the object of the bearing
    b. the meridian through the ship's position
    c. the meridian midway between the ship and the object
    d. any meridian
434: The purpose of the "set" hand on an aneroid barometer is to __________.

    a. adjust the barometer
    b. indicate any change in the reading of the barometer
    c. provide a correction for height above sea level
    d. provide a correction for temperature changes
435: If an observer is at 35°N latitude, his zenith is __________.

    a. 55°S of the celestial equator
    b. at the north celestial pole
    c. 35°N of the celestial equator
    d. 55°N of the celestial equator
436: A wind vane on a moving vessel shows __________.

    a. dead reckoning wind direction
    b. true wind direction
    c. apparent wind direction
    d. estimated wind direction
437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?

    a. 22.4 feet (6.8 meters)
    b. 23.4 feet (7.2 meters)
    c. 24.9 feet (7.6 meters)
    d. 25.7 feet (7.8 meters)
438: Your longitude is 124°E, and your local mean time is 0520 on the 5th of the month. The mean time and date at Greenwich is __________.

    a. 1336 on the 4th
    b. 1336 on the 5th
    c. 2104 on the 4th
    d. 2104 on the 5th
439: If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere?

    a. South-southwesterly
    b. North-northwesterly
    c. South-southeasterly
    d. North-northeasterly
440: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )

    a. Continue on the present heading until the range is in line, then alter course to the left.
    b. Immediately alter course to the right to bring the range in line.
    c. Immediately alter course to 309°T.
    d. Continue on course until the range is closed, then alter course to the right.
441: A yellow buoy may exhibit a(n) __________.

    a. fixed red light
    b. flashing light
    c. white light
    d. occulting light
442: In very high latitudes, the most practical chart projection is the __________.

    a. Mercator
    b. gnomonic
    c. azimuthal
    d. Lambert conformal
444: A sylphon cell is a part of a __________.

    a. maximum thermometer
    b. barograph
    c. thermograph
    d. hygrometer
445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.

    a. upper limb of a celestial body
    b. lower limb of a celestial body
    c. centers of the various celestial bodies
    d. lower limb of the Sun and Moon; center of the stars and planets
446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.

    a. northwest, west, and south
    b. southwest, south, and southeast
    c. north, northwest, and east
    d. west, northwest, and north
447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?

    a. 5.3 feet (1.6 m)
    b. 5.6 feet (1.7 m)
    c. 6.2 feet (1.9 m)
    d. 6.8 feet (2.7 m)
448: Mean high water is the reference datum used to measure __________.

    a. soundings on the east coast of the United States
    b. soundings in European waters
    c. heights of topographical features in the United States
    d. both heights and soundings worldwide
449: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?

    a. 340°
    b. 295°
    c. 158°
    d. 114°
450: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

    a. cirrus clouds
    b. smoother seas and warmer water
    c. steeper waves, closer together
    d. long swells
451: Which light characteristic may be used on a special purpose mark?

    a. Fixed
    b. Occulting
    c. Equal interval
    d. Quick flashing
452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.

    a. a straight line drawn on the chart approximates a great circle
    b. the chart should not be used outside of the standard parallels
    c. the course angle is measured at the mid-longitude of the track line
    d. distance cannot be measured directly from the chart
454: On what does the operation of an aneroid barometer depend?

    a. Thin, metal, air tight cell
    b. Curved tube containing alcohol
    c. Column of mercury supported by atmospheric pressure
    d. Expansion of mercury in a closed tube
455: The height of eye correction is smaller than geometrical dip because of __________.

    a. the angle between the horizontal and the line of sight to the visible horizon
    b. index error
    c. parallax
    d. terrestrial refraction
456: Which condition exists in the eye of a hurricane?

    a. Wind rapidly changing direction
    b. A temperature much lower than that outside the eye
    c. Towering cumulonimbus clouds
    d. An extremely low barometric pressure
457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4).

    a. 3.0 feet
    b. 3.5 feet
    c. 4.0 feet
    d. 4.4 feet
458: The prevailing westerlies of the Southern Hemisphere blow 18-30 knots __________.

    a. all year long
    b. during the summer months only
    c. during the winter only
    d. during spring only
459: A buoy bears 178°T at 3000 yards (2700 meters). What is the course to make good to leave the buoy 100 yards (90 meters) to port?

    a. 174°T
    b. 176°T
    c. 178°T
    d. 180°T
460: When using horizontal sextant angles of three objects to fix your position, an indeterminate position will result in which situation?

    a. The objects lie in a straight line.
    b. The vessel is inside of a triangle formed by the objects.
    c. The vessel is outside of a triangle formed by the objects.
    d. A circle will pass through your position and the three objects.
461: Under the U.S. Aids to Navigation System, a yellow buoy may __________.

    a. mark a fish net area
    b. be lighted with a white light
    c. show a fixed red light
    d. All of the above
462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?

    a. Plotting radio bearings over a long distance
    b. Determining latitude and longitude of a fix
    c. Measuring rhumb line distances
    d. Measuring rhumb line directions
464: Prior to reading an aneroid barometer, you should tap the face lightly with your finger to __________.

    a. expose any loose connections
    b. demagnetize the metal elements
    c. bring the pointer to its true position
    d. contract and expand the glass face
465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.

    a. hs to the visible horizon
    b. hs to the sensible horizon
    c. hs to the celestial horizon
    d. Ho to the celestial horizon
466: In the relatively calm area near the hurricane center, the seas are __________.

    a. moderate but easily navigated
    b. calm
    c. mountainous and confused
    d. mountainous but fairly regular as far as direction is concerned
467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet?

    a. 1612
    b. 1630
    c. 1653
    d. 1718
468: Which of the symbols shown represents a cold front? (D018NG )

    a. A
    b. B
    c. C
    d. D
469: Where are the prevailing westerlies of the Southern Hemisphere located?

    a. Between the Equator and 10° latitude
    b. Between 10° and 20° latitude
    c. Between 30° and 60° latitude
    d. Between 60° and 90° latitude
470: You are underway on course 120°T and can make 12 knots. The eye of a hurricane bears 150°T at 120 miles. The hurricane is on course 295° at 20 knots. What course should you steer at 12 knots to have the maximum CPA?

    a. 312°
    b. 330°
    c. 348°
    d. 001°
471: Yellow lights may appear on __________.

    a. special purpose buoys
    b. vertically-striped buoys
    c. horizontally-banded buoys
    d. spherical buoys
472: Which conic projection chart features straight lines which closely approximate a great circle?

    a. Polyconic
    b. Lambert conformal
    c. Orthographic
    d. Stereographic
474: Which indication on the barometer is most meaningful in forecasting weather?

    a. The words "Fair -- Change -- Rain"
    b. The direction and rate of change of barometric pressure
    c. The actual barometric pressure
    d. The relative humidity
475: A correction for augmentation is included in the Nautical Almanac corrections for __________.

    a. the Sun
    b. the Moon
    c. Venus
    d. None of the above
476: Tropical cyclones normally form within which of the following belts of latitude?

    a. 5° to 15°
    b. 15° to 30°
    c. 30° to 45°
    d. 45° to 60°
477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983.

    a. 1.1 feet
    b. 1.2 feet
    c. 1.4 feet
    d. 1.7 feet
478: The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.

    a. ship's speed must be less than the true wind velocity
    b. true wind must be from dead astern
    c. true wind velocity must be faster than the ship's speed
    d. true wind must be from dead ahead
479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?

    a. 114°
    b. 158°
    c. 295°
    d. 340°
481: A special mark (yellow buoy), if lighted, may exhibit which light rhythm?

    a. Flashing
    b. Morse "A"
    c. Equal interval
    d. Occulting
482: Which statement about a gnomonic chart is correct?

    a. A rhumb line appears as a straight line.
    b. Distance is measured at the mid-latitude of the track line.
    c. Meridians appear as curved lines converging toward the nearer pole.
    d. Parallels, except the equator, appear as curved lines.
483: Coral atolls, or a chain of islands at right angles to the radar beam, may show as a long line rather than as individual targets due to __________.

    a. the effects of beam width
    b. limitations on range resolution
    c. the pulse length of the radar
    d. the multiple-target resolution factor
484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.

    a. 30.05 inches of mercury
    b. 30.05 millimeters of mercury
    c. 30.05 millibars
    d. falling
485: A phase correction is applied to observations of __________.

    a. the Sun
    b. stars
    c. planets
    d. All of the above
486: Tropical cyclones do not form within 5° of the Equator because __________.

    a. there are no fronts in that area
    b. it is too hot
    c. it is too humid
    d. of negligible Coriolis force
487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)?

    a. 0740
    b. 0754
    c. 0840
    d. 0922
488: A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?

    a. 13°E
    b. 87°E
    c. 177°E
    d. 177°W
489: You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?

    a. Get underway and be in deep, open-ocean water when the tsunami arrives.
    b. Increase the scope of the anchor cable and drop the second anchor underfoot at short stay.
    c. Get underway and be close inshore on the side of the island away from the tsunami.
    d. Plant both anchors with about a 60° angle between them, and let out a long scope to each anchor.
490: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. Which course should you steer at 10 knots to have the maximum CPA?

    a. 221°
    b. 226°
    c. 233°
    d. 238°
491: A special purpose buoy shall be __________.

    a. lighted with a white light
    b. striped black and red
    c. lighted with a red light
    d. yellow
492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth?

    a. Lambert conformal
    b. Oblique gnomonic
    c. Mercator
    d. Transverse conic
493: The picture shown represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )

    a. Ship No. 1 is not detected due to the shadow effect of the headland.
    b. The small island is not detected due to the effect of beam width.
    c. A tangent bearing of the headland to the south-southeast should be corrected by adding one-half of the beam width.
    d. Ship No. 2 is not detected due to the reflective mass of the background mountain overpowering the ship's reflective signals.
494: Aneroid barometers are usually calibrated to indicate atmospheric pressure in __________.

    a. inches of mercury and centimeters
    b. feet of mercury and millibars
    c. inches of mercury and millimeters
    d. inches of mercury and millibars
495: A semidiameter correction is applied to observations of __________.

    a. Mars
    b. the Moon
    c. Jupiter
    d. All of the above
496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.

    a. Indian Ocean
    b. North Pacific Ocean
    c. South Pacific Ocean
    d. South Atlantic Ocean
497: What will be the time after 0300 (ZD +4), on 5 March 1983, when the height of the tide at Port of Spain, Trinidad, will be 2.5 feet (.76 meters) ?

    a. 0548
    b. 0602
    c. 0618
    d. 0634
498: What is an advantage of the magnetic compass aboard vessels?

    a. Compass error is negligible at or near the earth's magnetic poles.
    b. It does not have to be checked as often.
    c. It is reliable due to it's essential simplicity.
    d. All points on the compass rose are readily visible.
499: Which of the symbols shown represents an occluded front? (D018NG )

    a. A
    b. B
    c. C
    d. D
500: The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of __________.

    a. Alaska
    b. Canada
    c. Puerto Rico
    d. Hawaii
501: Which of the buoys listed below could be used to mark an anchorage?

    a. White buoy numbered "3"
    b. White buoy with a green top
    c. White buoy with orange bands
    d. Yellow buoy lettered "N"
502: A gnomonic projection is based on a(n) __________.

    a. plane tangent at one point
    b. cylinder tangent at the equator
    c. cone tangent at one parallel
    d. infinite series of cones tangent at selected parallels
503: You are approaching a light fitted with a RACON. The light may be identified on the radar by __________.

    a. a dashed line running from the center of the scope to the light
    b. an audible signal when the sweep crosses the light
    c. a circle appearing on the scope surrounding the light
    d. a coded signal appearing on the same bearing at a greater range than the light
504: Barometer readings in weather reports are given in terms of pressure at __________.

    a. sea level
    b. Washington, D.C.
    c. the weather station
    d. the broadcasting station
505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the __________.

    a. horizontal parallax decreases
    b. observer's height above sea level increases
    c. humidity of the atmosphere decreases
    d. altitude of the body decreases
506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?

    a. 1454
    b. 1424
    c. 1405
    d. 1342
506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?

    a. 1454
    b. 1424
    c. 1405
    d. 1342
507: What will be the time after 1000 EST (ZD +5), on 4 March 1983, that the height of the tide at City Island, NY, will be 2.4 feet?

    a. 1228
    b. 1240
    c. 1244
    d. 1248
508: Which statement about the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

    a. There is a dangerous eddy southeast of Beito Island.
    b. Maury lightship is visible for 17 miles.
    c. The bottom to the south-southeast of the lightship is soft coral.
    d. There is a 12-meter deep west of Beito Island and inside the 5-meter line.
509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.

    a. straight line
    b. arc
    c. parabola
    d. line parallel to the coast
510: Which aid is NOT marked on a chart with a magenta circle?

    a. Aero light
    b. Radar station
    c. Radar transponder beacon
    d. Radio beacon
510: Which aid is NOT marked on a chart with a magenta circle?

    a. Aero light
    b. Radar station
    c. Radar transponder beacon
    d. Radio beacon
511: A survey (special purpose mark) buoy __________.

    a. must be lighted
    b. may have a flashing red light
    c. may have a fixed white light
    d. None of the above
512: On a gnomonic chart, a great circle track between Los Angeles and Brisbane will appear as a __________.

    a. loxodromic curve
    b. curved line concave to the equator
    c. straight line
    d. spiral approaching the poles as a limit
513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )

    a. A
    b. B
    c. C
    d. D
514: What instrument measures wind velocity?

    a. Hydrometer
    b. Barometer
    c. Psychrometer
    d. Anemometer
515: The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.

    a. hour circle of the body
    b. parallel of declination
    c. vertical circle of the body
    d. parallel of altitude
516: A hurricane moving northeast out of the Gulf passes west of your position. You could expect all of the following EXCEPT __________.

    a. higher than normal swells
    b. high winds
    c. winds veering from south, through west, to northwest
    d. gradual pressure gradient
517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?

    a. 0.1 foot
    b. 1.2 feet
    c. 1.9 feet
    d. 2.3 feet
518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.

    a. selective availability is set to zero
    b. the satellites are all below 15° in elevation
    c. your vessel is equipped with a Doppler receiver
    d. the horizontal dilution of precision is high
519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?

    a. Surging
    b. Spilling
    c. Plunging
    d. Converging
520: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

    a. 5-fathom curve
    b. prohibited area
    c. lighted buoy
    d. radio beacon
521: Which sextant has an index error of 2'10" on the arc? (D050NG )

    a. A
    b. B
    c. C
    d. D
522: All straight lines represent great circle tracks on a chart based on a(n) __________.

    a. Mercator projection
    b. polyconic projection
    c. orthographic projection
    d. gnomonic projection
523: A radar display in which North is always at the top of the screen is a(n) __________.

    a. unstabilized display
    b. stabilized display
    c. composition display
    d. relative display
524: An anemometer on a moving vessel measures __________.

    a. apparent wind speed only
    b. true wind speed and true wind direction
    c. true wind speed only
    d. apparent wind speed and true wind direction
525: In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?

    a. Altitude
    b. Right ascension
    c. Celestial meridians
    d. Declination
526: When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.

    a. high pressure area
    b. extratropical low-pressure system
    c. tropical storm
    d. easterly wave
527: On 6 June 1983, at 1719 EST (ZD +5), what will be the predicted height of tide at Chester, PA?

    a. 0.8 feet( 0.2 meters)
    b. 1.1 feet (0.3 meters)
    c. 3.5 feet (1.1 meters)
    d. 4.7 feet (1.4 meters)
528: What should you expect when you encounter a tsunami in the open ocean?

    a. Violent seas from mixed directions
    b. No noticeable change from the existing sea state
    c. Winds increasing to gale force from the northwest in the Northern Hemisphere
    d. A major wave of extreme height and length
529: In some river mouths and estuaries the incoming high-tide wave crest overtakes the preceding low-tide trough. This results in a wall of water proceeding upstream, and is called a __________.

    a. seiche
    b. bore
    c. boundary wave
    d. surge
530: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

    a. the port side of the channel
    b. the position of underwater cables
    c. safe water
    d. a hazard to navigation
531: You have been informed that dredging operations may be underway in your vicinity. Which buoy indicates the dredging area?

    a. White buoy with a green top
    b. White and international orange buoy
    c. Yellow buoy
    d. Yellow and black vertically-striped buoy
532: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

    a. at high water
    b. at slack water
    c. at flood tide
    d. when there is a following current
533: You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0°. If bearings are measured in relation to the flash, what type of bearings are produced?

    a. Relative
    b. True
    c. Compass
    d. Magnetic
534: What is TRUE concerning an anemometer on a moving vessel?

    a. It measures true wind speed.
    b. It measures true wind speed and true wind direction.
    c. It measures apparent wind speed.
    d. It measures apparent wind speed and true wind direction.
535: The tropical year differs from which year by 20 minutes?

    a. Astronomical year
    b. Natural year
    c. Equinoctial year
    d. Sidereal year
536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.

    a. in the dangerous semicircle
    b. in the navigable semicircle
    c. directly in the path of the storm
    d. in the storm center
537: What will be the height of tide at Gargathy Neck, VA, at 1800 DST (ZD +4), on 16 August 1983?

    a. 2.3 feet
    b. 2.9 feet
    c. 3.3 feet
    d. 3.6 feet
538: Which symbol shown represents a stationary front? (D018NG )

    a. A
    b. B
    c. C
    d. D
539: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?

    a. 324°T
    b. 306°T
    c. 299°T
    d. 276°T
540: A white buoy with an orange rectangle on it is used to indicate __________.

    a. danger
    b. a controlled area
    c. an exclusion area
    d. general information
541: A yellow buoy may mark a(n) __________.

    a. wreck
    b. shoal area
    c. anchorage area
    d. middle ground
542: The only cylindrical chart projection widely used for navigation is the __________.

    a. Lambert conformal
    b. Mercator
    c. azimuthal
    d. gnomonic
543: A radar display which is oriented, so that north is always at the top of the screen, is called a(n) __________.

    a. relative display
    b. composite display
    c. stabilized display
    d. unstabilized display
544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.

    a. hydrometer
    b. psychrometer
    c. barometer
    d. anemometer
545: The arc of a great circle which passes through the body and celestial poles is part of the __________. (D007NG )

    a. hour circle
    b. diurnal circle
    c. observer's meridian
    d. altitude circle
546: If it is impossible to avoid a hurricane in the Northern Hemisphere, the most favorable place to be when the storm passes is in __________.

    a. the dangerous semicircle
    b. the eye (center) of the storm
    c. that half of the storm lying to the right of the storm's path
    d. that half of the storm lying to the left of the storm's path
547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?

    a. 2.8 feet (0.8 meters)
    b. 3.4 feet (1.0 meters)
    c. 4.2 feet (1.3 meters)
    d. 5.6 feet (1.7 meters)
548: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

    a. have either a double ebb or a double flood
    b. become reversing currents
    c. become weak and variable
    d. exceed the predicted velocities
549: On a working copy of a weather map, an occluded front is represented by which color line?

    a. Red
    b. Blue
    c. Alternating red and blue
    d. Purple
550: The description "Racon" beside an illustration on a chart would mean a __________.

    a. radar transponder beacon
    b. radar conspicuous beacon
    c. radar calibration beacon
    d. circular radio beacon
551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?

    a. A topmark triangular in shape
    b. A topmark spherical in shape
    c. Lettering on the buoy
    d. A topmark consisting of two cones with the points up
552: A Mercator chart is a __________.

    a. cylindrical projection
    b. simple conic projection
    c. polyconic projection
    d. rectangular projection
553: The beam width of your radar is 2°. The left tangent bearing of a small island, as observed on the PPI scope, is 056°pgc. If the gyro error is 2°E, what bearing would you plot on the chart?

    a. 052°
    b. 056°
    c. 059°
    d. 060°
554: A sling psychrometer is a(n) __________.

    a. type of cargo gear
    b. instrument used in celestial navigation
    c. instrument used to measure relative humidity
    d. instrument used to measure specific gravity
555: The letter D shown represents the __________. (D006NG )

    a. geoidal horizon
    b. celestial horizon
    c. visible horizon
    d. geometrical horizon
556: In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be __________.

    a. in the navigable semicircle
    b. in the dangerous semicircle
    c. directly in the path of the center
    d. ahead of the storm
557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?

    a. 1750
    b. 1815
    c. 1855
    d. 1944
558: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to starboard?

    a. 174°T
    b. 176°T
    c. 178°T
    d. 180°T
559: A great circle crosses the equator at 162°E. It will also cross the equator at what other longitude?

    a. 62°E
    b. 126°W
    c. 162°W
    d. 18°W
560: On 14 April 1981, a back sight is observed of the lower limb of the Sun. The height of eye is 45 feet. The index error is 2.5' on the arc. The sextant altitude (hs) is 117°14.6'. What is the observed altitude (Ho)?

    a. 63°01.9'
    b. 63°03.4'
    c. 63°07.4'
    d. 63°09.9'
561: Buoys which mark dredging areas are painted __________.

    a. black
    b. yellow
    c. green
    d. red
562: You wish to measure the distance on a Mercator chart between a point in latitude 42°30'N and a point in latitude 40°30'N. To measure 30 miles at a time you should set the points of the dividers at __________.

    a. 41°15' and 41°45'
    b. 41°45' and 42°15'
    c. 42°15' and 42°45'
    d. 42°00' and 42°30'
563: Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?

    a. 313°
    b. 314°
    c. 316°
    d. 317°
564: A hygrometer is a device used for determining __________.

    a. the absolute temperature
    b. atmospheric pressure
    c. wind velocity
    d. relative humidity
565: The letter B as shown represents the __________. (D006NG )

    a. geoidal horizon
    b. celestial horizon
    c. visible horizon
    d. sensible horizon
566: You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most likely __________.

    a. in the right semicircle
    b. in the left semicircle
    c. on the storm track ahead of the center
    d. on the storm track behind the center
568: The chart of a beach area shows a very steep slope to the underwater beach bottom. Which type of breakers can be expected when trying to land a boat on this beach?

    a. Surging
    b. Converging
    c. Spilling
    d. Plunging
569: A line of position formed by sighting two charted objects in line is called a(n) __________.

    a. relative bearing
    b. range line
    c. track line
    d. estimated position
570: Chart legends printed in capital letters show that the associated landmark is __________.

    a. inconspicuous
    b. conspicuous
    c. a government facility or station
    d. a radio transmitter
571: The Coast Guard Captain of the Port has excluded all traffic from a section of a port, while a regatta is taking place. The buoys marking this exclusion area will be __________.

    a. nun- or can-shaped to conform to the overall direction of navigation
    b. yellow
    c. orange and white
    d. marked with a spherical topmark
572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.

    a. 41°30' and 42°00'
    b. 41°45' and 42°15'
    c. 42°00' and 42°30'
    d. 42°15' and 42°45'
573: What is the name of the movable, radial guide line used to measure direction on a radar?

    a. Compass rose
    b. Cursor
    c. Plan position indicator
    d. Variable range marker
574: If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?

    a. 30.42 inches (1030 millibars)
    b. 30.45 inches (1031 millibars)
    c. 30.50 inches (1032 millibars)
    d. 30.53 inches (1033 millibars)
575: The horizontal plane, perpendicular to the zenith-nadir axis, that intersects with the celestial sphere and is tangent to the earth is called the __________.

    a. celestial horizon
    b. sensible horizon
    c. visible horizon
    d. geoidal horizon
577: Your vessel has a draft of 24 feet. On 7 April 1983 you wish to pass over a temporary obstruction near Lovell Island, MA, that has a charted depth of 22 feet. Allowing for a safety margin of 3.1 feet under your keel, what is the earliest time after 0100 EST (ZD +5) that this passage can be made?

    a. 0248
    b. 0304
    c. 0342
    d. 0356
578: At about GMT 1436, on 3 December 1981, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?

    a. Ho 4°18.6'
    b. Ho 4°29.1'
    c. Ho 4°36.3'
    d. Ho 4°42.2'
579: Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.

    a. permanent waves
    b. tidal waves
    c. tropical waves
    d. tropical storms
580: On 21 January 1981, you observe a back sight of the Sun's lower limb. The sextant altitude (hs) is 121°31.5'. The index error is 2.5' on the arc. The height of eye is 31 feet (9.3 meters). What is the observed altitude (Ho)?

    a. 31°06.2'
    b. 58°53.1'
    c. 58°12.2'
    d. 58°03.2'
581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.

    a. red or green to conform with the other lateral aids
    b. red and green horizontally-striped
    c. solid yellow
    d. white with orange markings
582: Distance along a track line is measured on a Mercator chart by using the __________.

    a. latitude scale near the middle of the track line
    b. longitude scale near the middle of the track line
    c. latitude scale at the mid-latitude of the chart
    d. latitude or longitude scale at the middle of the scale
582: Distance along a track line is measured on a Mercator chart by using the __________.

    a. latitude scale near the middle of the track line
    b. longitude scale near the middle of the track line
    c. latitude scale at the mid-latitude of the chart
    d. latitude or longitude scale at the middle of the scale
583: The radar control used to reduce sea return at close ranges is the __________.

    a. gain control
    b. sensitivity time control
    c. fast time constant
    d. pulse length control
584: The correction(s) which must be applied to an aneroid barometer reading include(s) __________.

    a. height error
    b. gravity error
    c. temperature error
    d. All of the above
585: What great circle is always needed to form the astronomical triangle?

    a. Celestial Equator
    b. Prime Meridian
    c. Celestial Meridian
    d. Prime Vertical Circle
586: The approximate distance to a storm center can be determined by noting the hourly rate of fall of the barometer. If the rate of fall is 0.08 - 0.12 inches, what is the approximate distance to the storm center?

    a. 50 to 80 miles
    b. 80 to 100 miles
    c. 100 to 150 miles
    d. 150 to 250 miles
587: Your vessel has a draft of 34 feet. On 8 October 1983 you wish to pass over an obstruction near Jaffrey Point, NH, that has a charted depth of 31 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 0900 DST (ZD +4) that this passage can be made?

    a. 0920
    b. 1029
    c. 1120
    d. 1159
588: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?

    a. 39 miles
    b. 45 miles
    c. 53 miles
    d. 59 miles
589: What is the index error of sextant D? (D050NG )

    a. 7'10" on the arc
    b. 6'50" on the arc
    c. 3'00" on the arc
    d. 2'10" on the arc
590: On 16 January 1981, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is -10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?

    a. 4°10.2'
    b. 4°14.3'
    c. 4°17.0'
    d. 4°24.1'
591: White lights may be found on __________.

    a. special purpose buoys
    b. preferred channel buoys
    c. information and regulatory buoys
    d. numbered buoys
592: To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale should be used?

    a. 33°00'N to 33°30'N
    b. 32°30'N to 33°00'N
    c. 32°45'N to 33°15'N
    d. 32°15'N to 32°45'N
593: Radar makes the most accurate determination of the __________.

    a. direction of a target
    b. distance to a target
    c. size of a target
    d. shape of a target
594: Barometers are calibrated at a standard temperature of __________.

    a. 0°F
    b. 32°F
    c. 60°F
    d. 70°F
595: In the navigational triangle, the angle at the elevated pole is the __________.

    a. meridian angle
    b. altitude
    c. right ascension
    d. azimuth angle
596: Which condition would NOT indicate the approach of a tropical storm?

    a. Long, high swells
    b. Cirrus clouds
    c. Halos about the Sun or Moon
    d. Decrease in wind velocity
597: You will be loading in Boston Harbor to a maximum draft of 32'06". The charted depth of an obstruction in the channel near Boston Light is 30 feet and you wish to have 3 feet of keel clearance. The steaming time from the pier to the obstruction is 01h 05m. What is the latest time (ZD +4) you can sail on 17 May 1983 and meet these requirements?

    a. 1610
    b. 1728
    c. 1821
    d. 2350
598: A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?

    a. 180°E
    b. 41°E
    c. 141°W
    d. 39°W
599: Magnetic compass deviation __________.

    a. varies depending upon the bearing used
    b. is the angular difference between magnetic north and compass north
    c. is published on the compass rose on most nautical charts
    d. is the angular difference between geographic and magnetic meridians
600: The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.

    a. measured from due south clockwise 180°
    b. measured from due south counterclockwise 180°
    c. to the left of the storm's track
    d. ahead of the typhoon measured from the storm's track to 90° on each side
601: White and orange buoys, if lighted, show which color light?

    a. White
    b. Orange
    c. Red
    d. Alternating yellow and white
602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?

    a. 35°52'45"
    b. 51°39'00"
    c. 74°21'11"
    d. 82°36'12"
603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?

    a. 3 cm
    b. 10 cm
    c. 30 cm
    d. 100 cm
604: Chronometer error may be found by __________.

    a. radio time signal
    b. comparison with a timepiece of known error
    c. applying the prevailing chronometer rate to previous readings
    d. All of the above
605: Which is NOT a side of the celestial navigational triangle?

    a. Co-latitude
    b. Zenith distance
    c. Altitude
    d. Co-declination
606: Early indications of the approach of a hurricane may be all of the following EXCEPT __________.

    a. short confused swells
    b. gradually increasing white clouds (mare's tails)
    c. pumping barometer
    d. continuous fine mist-like rain
607: The charted depth alongside the south face of Mystic Pier, Charlestown, MA, is 35 feet. Your maximum draft is 38 feet. You wish to have 2 feet under the bottom, on a rising tide, when you go alongside to discharge a heavy lift. What is the earliest time after 0900 EST (ZD +5), on 2 February 1983, that you can dock?

    a. 1020
    b. 1050
    c. 1127
    d. 1137
608: In which voyage, between two points, is the rhumb line distance NOT approximately the same as the great circle distance?

    a. The two points are in low latitudes in the same hemisphere.
    b. The two points are in high latitudes in the same hemisphere.
    c. The two points are near the equator, but in different hemispheres.
    d. One point is near the equator, one point is in a high latitude, and both are near the 180th meridian.
609: A tropical wave is located 200 miles due west of your position, which is north of the equator. Where will the wave be in 24 hours?

    a. Farther away to the west
    b. Farther away to the east
    c. In the same place
    d. Closer and to the west
610: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true wind __________.

    a. must be from dead ahead
    b. speed must be zero
    c. must be from dead astern
    d. must be on the beam
611: Information markers, when lighted, will display __________.

    a. yellow lights
    b. green lights
    c. white lights
    d. red lights
612: Which statement is TRUE concerning a Mercator projection?

    a. Degrees of longitude decrease in length as latitude increases.
    b. The length of the meridians is increased to provide for equal expansion in all directions.
    c. The mileage between the meridians is increased as the latitude increases.
    d. All of the above
613: Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.

    a. a submerged submarine
    b. ducting
    c. sub-refraction
    d. ionospheric skip waves
614: A marine chronometer should be rewound once every __________.

    a. 12 hours
    b. day
    c. 3 days
    d. week
615: The spinning motion of a planet around its axis is called __________.

    a. revolution
    b. rotation
    c. orbit
    d. space motion
617: You are bound for the Chelsea docks in the Hudson River. The Captain wants to arrive at the docks at the first slack water on 28 July 1983. You are keeping daylight saving time. What time should you be at the docks?

    a. 0215
    b. 0530
    c. 0811
    d. 0911
619: According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, the center of the low pressure is located to the __________.

    a. east-northeast
    b. south-southwest
    c. east-southeast
    d. west-southwest
620: Chart legends which indicate a conspicuous landmark are printed in __________.

    a. capital letters
    b. italics
    c. boldface print
    d. underlined letters
621: Navigational marks used for informational or regulatory purposes are __________.

    a. solid yellow
    b. white with orange geometric shapes
    c. red and white vertically-striped
    d. green and red horizontally-banded
622: The scale of a Mercator projection is 4 inches equals 1°LONG. What is the expansion in inches between the 60th and 61st parallels?

    a. 8.11 inches
    b. 7.70 inches
    c. 7.48 inches
    d. 6.98 inches
623: An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?

    a. Their bearing is almost constant, even when the true bearing of the contact changes appreciably.
    b. They always appear on a bearing of 90°From the true bearing of the contact.
    c. The indirect echoes usually appear in shadow sectors.
    d. When plotted, their movements are usually abnormal.
624: When using a mechanical (windup type) marine chronometer, how often should it be reset?

    a. Only when it is overhauled
    b. Whenever the chronometer error exceeds approximately four minutes
    c. At the start of each voyage
    d. If the chronometer rate changes from gaining to losing or vice versa
625: The center of a circle of equal altitude, plotted on the surface of the Earth, is the __________.

    a. dead reckoning position of the observer
    b. assumed position of the observer
    c. geographical position of the body
    d. assumed position of the body
626: What indicates the arrival of a hurricane within 24 to 36 hours?

    a. The normal swell becoming lower and from a steady direction
    b. Long bands of nimbostratus clouds radiating from a point over the horizon
    c. The barometer drops 2 millibars between 1000 and 1600
    d. Unusually good weather with above average pressures followed by a slow fall of 4 millibars in six hours
627: You are on a coastwise voyage bound for Marcus Hook, PA. Your speed is 15 knots. You wish to use the flood tide to facilitate docking starboard side to, heading seaward. To have the most favorable tide throughout, you should time your arrival at the entrance to Delaware Bay __________.

    a. for 1 hour before flood begins
    b. for 1 hour after flood begins
    c. for 3 hours after flood begins
    d. for 1 hour before ebb begins
629: The rise and fall of the ocean's surface due to a distant storm is known as __________.

    a. sea
    b. waves
    c. fetch
    d. swell
630: What kind of weather would you expect to accompany the passage of a tropical wave?

    a. Heavy rain and cloudiness
    b. Good weather
    c. A tropical storm
    d. Dense fog
631: A light characteristic of composite group flashing indicates that there is a(n) __________.

    a. sharp turn in the channel
    b. narrowing in the channel at that point
    c. junction in the channel
    d. obstruction that must be left to port
632: You must construct a Mercator projection for an area bounded by latitudes 40° - 47°N and longitudes 176°E to 176°W on a paper 28 X 36 inches. Allow a neat line of one inch. What will be the separation between meridians?

    a. 3.190 inches
    b. 3.249 inches
    c. 3.529 inches
    d. 3.714 inches
633: You have another ship overtaking you close aboard to starboard. You have 3 radar targets bearing 090° relative at ranges of .5 mile, 1 mile, and 1.5 miles. In this case, the unwanted echoes are called __________.

    a. multiple echoes
    b. spoking
    c. indirect echoes
    d. side-lobe echoes
634: What will cause the ARPA to emit a visual alarm, audible alarm, or both?

    a. An acquired target entering into a guard zone
    b. A tracked target lost for one radar scan
    c. A tracked target entering your preset CPA-TCPA limits
    d. A target being initially detected within a guard zone
635: A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.

    a. poor fix
    b. good fix
    c. poor signal quality
    d. good signal quality
636: Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?

    a. Hurricane
    b. Tropical disturbance
    c. Tropical depression
    d. Cyclone
637: Your draft is 24 feet. You wish to pass over an obstruction near Lovell Island, MA, on 6 May 1983. The charted depth is 22 feet. Allowing a safety margin of 3.0 feet, what is the earliest time after 0200 DST (ZD +4) that this passage can be made?

    a. 0215
    b. 0245
    c. 0310
    d. 0347
638: Swell is the rise and fall of the ocean's surface due to __________.

    a. fetch
    b. distant winds
    c. local storms
    d. the pull of the moon
638: Swell is the rise and fall of the ocean's surface due to __________.

    a. fetch
    b. distant winds
    c. local storms
    d. the pull of the moon
639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?

    a. Cumulus clouds lined up in rows extending in a northeast to southwest direction
    b. High altostratus clouds in the morning hours
    c. Cirrostratus clouds lined up in rows extending in a northeast to southwest direction
    d. Cirrostratus clouds lined up in rows extending in a north to south direction
641: Buoys which mark isolated dangers are painted with alternating _____________ .

    a. red and black bands
    b. green and black bands
    c. red and white stripes
    d. green and white bands
642: Which government agency publishes the U.S. Coast Pilot?

    a. Army Corps of Engineers
    b. National Geospatial-Intelligence Agency
    c. National Ocean Service
    d. U.S. Coast Guard
643: When using the radar for navigating __________.

    a. the best fix is obtained by using a tangent bearing and a range
    b. and using two radar ranges for a fix, the objects of the ranges should be close to reciprocal bearings
    c. and using ranges, the most rapidly changing range should be measured last
    d. and crossing a radar range of one object with the visual bearing of a second object, the two objects should be 80° to 110° apart
644: Your ARPA has been tracking a target and has generated the targets course and speed. The radar did not receive a target echo on its last two scans due to the weather. What should you expect under these circumstances?

    a. The ARPA will generate data as if the target was still being tracked by radar.
    b. The ARPA will give an audible and/or visual lost target alarm.
    c. The ARPA will generate data based on sea return echoes from the vicinity where the target was lost.
    d. The ARPA has lost all "memory" of the target and must recompute the target data.
645: The arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°, is the __________.

    a. altitude
    b. declination
    c. latitude
    d. azimuth angle
646: You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?

    a. Place the wind on the starboard quarter and hold that course.
    b. Place the wind on the port quarter and hold that course.
    c. Place the wind on the port bow and hold that course.
    d. Place the wind on the starboard bow and hold that course.
647: You will enter Argentia, Newfoundland, at 1200 on 5 October 1983, while keeping zone description +3 on the ship's clocks. What will be the height of tide at this time (based on the Canadian chart datum)?

    a. 0.5 feet
    b. 1.2 feet
    c. 2.1 feet
    d. 3.4 feet
648: Weather systems in the middle latitudes generally travel from __________.

    a. north to south
    b. west to east
    c. east to west
    d. None of the above
649: You are on course 226°T. In order to check the latitude of your vessel, you should observe a celestial body on which bearing?

    a. 226°
    b. 270°
    c. 000°
    d. 026°
650: What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?

    a. A tropical disturbance
    b. A tropical depression
    c. A tropical storm
    d. A hurricane
651: Which topmark shown identifies an isolated danger? (D023NG )

    a. A
    b. B
    c. C
    d. D
652: What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?

    a. National Ocean Service
    b. National Imagery and Mapping Agency
    c. U.S. Coast Guard
    d. U.S. Naval Observatory
653: You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?

    a. The contact is dead in the water.
    b. The contact is on the same course and speed as your vessel.
    c. The contact is on a reciprocal course at the same speed as your vessel.
    d. The radar is showing false echoes and is probably defective.
654: Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?

    a. The generated CPA will be less than the actual CPA.
    b. The generated TCPA will be later than the actual TCPA.
    c. The range of initial target acquisition will be less than normal.
    d. The targets true course vector will be in error.
654: Your ARPA has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?

    a. The generated CPA will be less than the actual CPA.
    b. The generated TCPA will be later than the actual TCPA.
    c. The range of initial target acquisition will be less than normal.
    d. The targets true course vector will be in error.
655: The equator is __________.

    a. the primary great circle of the Earth perpendicular to the axis
    b. the line to which all celestial observations are reduced
    c. the line from which a celestial body's altitude is measured
    d. All of the above
656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.

    a. starboard bow and make as much headway as possible
    b. starboard quarter, and make as much headway as possible
    c. port quarter, and make as much headway as possible
    d. port bow, and make as much headway as possible
657: Current refers to the __________.

    a. vertical movement of the water
    b. horizontal movement of the water
    c. density changes in the water
    d. None of the above
658: Monsoons are characterized by __________.

    a. light, variable winds with little or no humidity
    b. strong, gusty winds that blow from the same general direction all year
    c. steady winds that reverse direction semiannually
    d. strong, cyclonic winds that change direction to conform to the passage of an extreme low pressure system
660: What is the length of a nautical mile?

    a. 1,850 meters
    b. 5,280 feet
    c. 1,760 yards
    d. 6,076 feet
661: Under the IALA Buoyage Systems, safe water marks may show a __________.

    a. composite group-flashing, Fl(2 + 1), red light
    b. composite group-flashing, Fl(2 + 1), green light
    c. quick-flashing, Q(9)15s, white light
    d. white Morse (A) light
662: What publication contains descriptions of the coast line, buoyage systems, weather conditions, port facilities, and navigation instructions for the United States and its possessions?

    a. Coast Pilots
    b. Sailing Directions
    c. Port Index
    d. Light List
663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.

    a. dead in the water
    b. 5 knots
    c. 10 knots
    d. 15 knots
664: Which ARPA data should you use in order to determine if a close quarters situation will develop with a target vessel?

    a. Set and drift of the current
    b. Relative track information
    c. Predicted time of CPA
    d. Initial range of acquisition
665: 17 degrees of latitude is equal to __________.

    a. 68 miles
    b. 510 miles
    c. 1020 miles
    d. 4080 miles
666: In the Northern Hemisphere, your vessel is believed to be in the direct path of a hurricane, and plenty of sea room is available. The best course of action is to bring the wind on the __________.

    a. starboard bow, note the course, and head in that direction
    b. starboard quarter, note the course, and head in that direction
    c. port quarter, note the course, and head in that direction
    d. port bow, note the course, and head in that direction
667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.

    a. behind the typhoon, measured from 90° to 180°From each side of the storm's track
    b. to the right of the storm's track
    c. ahead of the typhoon, measured from the storm's track to 90° on each side
    d. measured from due south, counterclockwise 180°
668: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042° at 105 miles from you. What is the course to steer at 10 knots to intercept vessel A?

    a. 063°
    b. 068°
    c. 073°
    d. 079°
669: It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at least every __________.

    a. hour
    b. 3 hours
    c. 6 hours
    d. 8 hours
670: A NAVAREA warning carries the following number; 1986/87 (11). Which statement is TRUE?

    a. The warning was issued in 1986, the 87th sequentially numbered warning and broadcast 11 times.
    b. This is warning number 1986 issued in 1987, and it affects sub-region 11.
    c. This warning is valid in 1986 and 1987 and is the eleventh two-year warning.
    d. The subject of this warning first appeared in 1986; this warning is in 1987 and is the eleventh on this topic.
671: You sight a buoy fitted with a double-sphere topmark. If sighted at night, this buoy would show a __________.

    a. quick-flashing red light
    b. quick-flashing green light
    c. flashing white light showing a group of two flashes
    d. flashing red light showing a group of three flashes
672: You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?

    a. American Practical Navigator
    b. Notice to Mariners
    c. Coast Pilot
    d. Sailing Directions
673: You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later, the contact is 8 miles directly astern of you. What is the estimated speed of the contact?

    a. Dead in the water
    b. 1 knot
    c. 10 knots
    d. 15 knots
674: When using an ARPA, what should you consider in order to evaluate the information displayed?

    a. The target vessel's generated course and speed are based solely on radar inputs.
    b. Navigational constraints may require a target vessel to change course.
    c. The trial maneuver feature will automatically determine a course that will clear all targets.
    d. You cannot determine if a small target has been lost due to sea return.
675: 15° of latitude is equal to __________.

    a. 600 miles
    b. 900 miles
    c. 1200 miles
    d. 1500 miles
676: If you are caught in the left semicircle of a tropical storm, in the Southern Hemisphere, you should bring the wind __________.

    a. on the starboard quarter, hold course and make as much way as possible
    b. 2 points on the port quarter, and make as much way as possible
    c. on the port bow, and make as much way as possible
    d. dead ahead and heave to
677: A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in height of tide at the two ends of the passage, is called a __________.

    a. hydraulic current
    b. rectilinear current
    c. rotary current
    d. harmonic current
678: On 25 December 1981 you observe the Sun's lower limb. The sextant altitude (hs) is 4°06.9'. The height of eye is 47 feet and the index error is 1.6' on the arc. The temperature is 19°F. and the barometer reads 1030.8 millibars. What is the observed altitude (Ho)?

    a. 3°57.4'
    b. 4°01.9'
    c. 4°02.5'
    d. 4°03.4'
679: A tropical wave is usually preceded by __________.

    a. tropical storms
    b. good weather
    c. heavy rain and cloudiness
    d. heavy seas
680: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

    a. wind must be on the beam
    b. wind's speed must be zero
    c. wind must be from dead ahead
    d. wind's speed equals the ship's speed
681: You sight a spar buoy with the top mark shown in the illustration. You must __________. (D027NG )

    a. pass to the east of the buoy
    b. pass to the south of the buoy
    c. pass to the north of the buoy
    d. keep well clear of the buoy and pass on either side
682: Which table is NOT found in the U.S. Coast Pilots?

    a. Climatological table
    b. Luminous range table
    c. Meteorological table
    d. Coastwise distance table
683: A radar contact will remain stationary on a relative motion radar display only when it is __________.

    a. on the same course as your vessel
    b. at the same speed as your vessel
    c. on the same course and speed as your vessel
    d. on a reciprocal course at the same speed as your vessel
684: The ARPA may swap targets when automatically tracking if two targets __________.

    a. are tracked on reciprocal bearings
    b. are tracked at the same range
    c. are tracked on the same bearing
    d. pass close together
685: Thirty-two meters equals __________.

    a. 17.50 feet
    b. 58.52 feet
    c. 96.00 feet
    d. 104.99 feet
686: The pressure gradient between the horse latitudes and doldrums runs __________.

    a. east to west
    b. north to south
    c. northeast to southwest
    d. northwest to southeast
687: The drift and set of tidal, river, and ocean currents refer to the __________.

    a. position and area of the current
    b. speed and direction toward which the current flows
    c. type and characteristic of the current's flow
    d. None of the above
688: In mid-ocean, the characteristics of a wave are determined by three factors. What is NOT one of these factors?

    a. Effect of the moon's gravity
    b. Fetch
    c. Wind velocity
    d. Length of time a wind has been blowing
689: What is the index error of sextant C? (D050NG )

    a. 0'20" on the arc
    b. 1'00" on the arc
    c. 2'00" on the arc
    d. 5'10" on the arc
690: What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?

    a. A tropical disturbance
    b. A tropical depression
    c. A tropical storm
    d. A typhoon
691: Of the four light characteristics shown which one does NOT represent a safe water mark of the IALA Buoyage System? (D019NG )

    a. A
    b. B
    c. C
    d. D
692: Which publication should you check for complete information on Puget Sound weather conditions?

    a. Sailing Directions
    b. Light List
    c. Coast Pilot
    d. Chart of the area
693: Which general statement concerning radar is FALSE?

    a. Raising the antenna height increases the radar range.
    b. The ability of radar to detect objects is unaffected by weather conditions.
    c. Radar bearings are less accurate than radar ranges.
    d. Radar should be checked regularly during clear weather to ensure that it is operating properly.
694: Your ARPA has two guard zones. What is the purpose of the inner guard zone?

    a. Alert the watch officer that a vessel is approaching the preset CPA limit
    b. Warn of small targets that are initially detected closer than the outer guard zone
    c. Guard against target loss during critical maneuvering situations
    d. Sound an alarm for targets first detected within the zone
695: An azimuth angle for a body is measured from the __________.

    a. observer's meridian
    b. Greenwich meridian
    c. body's meridian
    d. zenith distance
696: The diurnal pressure variation is most noticeable in the __________.

    a. polar regions
    b. horse latitudes
    c. roaring forties
    d. doldrums
697: The set of the current is the __________.

    a. speed of the current at a particular time
    b. maximum speed of the current
    c. direction from which the current flows
    d. direction in which the current flows
698: You are in LONG 165°E, zone time at 0400, 1 November 1981. What is the zone time and date in LONG 165°W?

    a. 0600, 31 October
    b. 1800, 31 October
    c. 1800, 1 November
    d. 0600, 1 November
700: You are enroute to Savannah, GA, from Recife, Brazil. There is a strong N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.

    a. smoother seas and warmer water
    b. long swells
    c. steeper waves, closer together
    d. cirrus clouds
701: In the IALA Buoyage System, buoys with alternating red and green horizontal bands are used to indicate __________.

    a. fishing areas
    b. spoil grounds
    c. the preferred channel
    d. isolated dangers
702: Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay?

    a. Coast Pilot
    b. Light List
    c. Sailing Directions
    d. Pilot Charts
703: Which statement concerning the operation of radar in fog is TRUE?

    a. Radar ranges are less accurate in fog.
    b. Navigation buoys will always show up on radar.
    c. A sandy beach will show up clearer on radar than a rocky cliff.
    d. Small wooden boats may not show up on radar.
704: What is TRUE of the history display of a target's past positions on an ARPA?

    a. It provides a graphic display to emphasize which vessel is on a collision course.
    b. In the true presentation, it provides a quick visual check to determine if a vessel has changed course.
    c. The display is one of the primary inputs and must be in use when using the trial maneuver capability.
    d. It provides a graphic display of a target vessel's relative course, speed, and CPA.
705: The precession of the equinoxes occurs in a(n) __________.

    a. easterly direction
    b. westerly direction
    c. northerly direction
    d. southerly direction
706: A steep barometric gradient indicates __________.

    a. calms
    b. light winds
    c. strong winds
    d. precipitation
707: Set of the current is __________.

    a. its velocity in knots
    b. direction from which it flows
    c. estimated current
    d. direction towards which it flows
708: Which statement about Radio Navigational Warning Broadcasts is TRUE?

    a. Radio navigational warnings are valid for 10 days, unless cancelled earlier.
    b. NAVAREA warnings cover coastal areas only, while HYDROLANTS or HYDROPACS cover entire ocean areas.
    c. Radio navigational warnings issued by NGA (NIMA) are published in the Daily Memorandum and the Notice to Mariners.
    d. HYDROLANTS and HYDROPACS cover the same geographical areas as NAVAREA warnings, but are for the use of military vessels only.
709: A sea breeze is a wind __________.

    a. that blows towards the sea at night
    b. that blows towards an island during the day
    c. caused by cold air descending a coastal incline
    d. caused by the distant approach of a hurricane
710: What is the FIRST sign of the existence of a well developed tropical cyclone?

    a. Gale force winds from the north
    b. An unusually long ocean swell
    c. Steep, short-period waves and light wind
    d. Thunderstorms and higher than usual humidity
711: In the IALA Maritime Buoyage System, a red and white vertically-striped buoy is used as a(n) __________.

    a. safe water mark
    b. cardinal mark
    c. isolated danger mark
    d. special mark not primarily used for navigation
712: Information about the pilotage available at Miami harbor may best be obtained from which publication?

    a. World Port Index
    b. Sailing Directions
    c. Pilot Chart
    d. United States Coast Pilot
713: The closest point of approach (CPA) of a contact on a relative motion radar may be determined __________.

    a. immediately when the contact is noted on radar
    b. only if the radar scope is watched constantly
    c. after the contact has been marked at least twice
    d. by an occasional glance at the radar
714: When using the ARPA in heavy rain, which action should you take?

    a. Increase the radar gain to pick up weak echoes through the rain.
    b. Increase the STC setting to reduce close-in spurious signals.
    c. Navigate as though the effective range of the radar has been reduced.
    d. Increase the range of the inner and outer guard rings.
714: When using the ARPA in heavy rain, which action should you take?

    a. Increase the radar gain to pick up weak echoes through the rain.
    b. Increase the STC setting to reduce close-in spurious signals.
    c. Navigate as though the effective range of the radar has been reduced.
    d. Increase the range of the inner and outer guard rings.
715: The length of the year with respect to the vernal equinox is the __________.

    a. tropical year
    b. sidereal year
    c. anomalistic year
    d. All of the above
716: Standard atmospheric pressure in inches of mercury is __________.

    a. 30.00
    b. 28.92
    c. 29.92
    d. 29.00
717: Which term refers to the direction a current is flowing?

    a. Set
    b. Drift
    c. Vector direction
    d. Stand
718: You are to sail from Elizabethport, NJ, on 22 May 1983 with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 27 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD +4) you can sail on the afternoon of 22 May and pass over the obstruction with 3 feet of clearance?

    a. 1407
    b. 1331
    c. 1303
    d. 1242
719: You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?

    a. 209°
    b. 270°
    c. 299°
    d. 000°
720: Which change in the condition of the seas could indicate the formation of a tropical storm or hurricane several hundred miles from your location?

    a. A long swell from an unusual direction
    b. A lengthy lull in the wind and seas
    c. Large seas coming from different directions
    d. A brisk chop from the southeast
721: Under the IALA Buoyage System, a red and white vertically-striped buoy would NOT indicate __________.

    a. a landfall
    b. the extreme end of an islet
    c. a mid-channel
    d. a center line
722: Which publication would describe the explosive anchorages in the ports on the east coast of the United States?

    a. Sailing Directions
    b. Pilot Rules for Inland Waters
    c. Coast Pilot
    d. Notice to Mariners
723: If there is any doubt as to the proper operation of a radar, which statement is TRUE?

    a. Only a radar expert can determine if the radar is operating.
    b. All radars have indicator lights and alarms to signal improper operation.
    c. A radar range compared to the actual range of a known object can be used to check the operation of the radar.
    d. The radar resolution detector must be energized to check the radar.
724: Which statement concerning GPS is TRUE?

    a. It cannot be used in all parts of the world.
    b. There are 12 functioning GPS satellites at present.
    c. It may be suspended without warning.
    d. Two position lines are used to give a 2D fix.
725: The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.

    a. March 21
    b. June 21
    c. September 21
    d. December 21
726: Atmospheric pressure at sea level is equal to __________.

    a. 14.7 pounds per square inch
    b. 29.92 inches of mercury
    c. 1013.25 millibars
    d. All of the above
727: What is an ebb current?

    a. A current at minimum flow
    b. A current coming in
    c. A current going out
    d. A current at maximum flow
728: In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 03°35.5'. Your height of eye is 32 feet and there is no index error. The air temperature is -10°C and the barometer reads 1010 millibars. What is the observed altitude (Ho)?

    a. 03°14.5'
    b. 03°15.8'
    c. 03°16.2'
    d. 03°28.8'
729: The doldrums are characterized by __________.

    a. steady, light to moderate winds
    b. frequent calms
    c. clear skies
    d. low humidity
730: In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located __________.

    a. in the southeast quadrant of the storm
    b. directly behind the storm center
    c. forward and to the right of its course
    d. behind and to the left of its course
731: Under the IALA Buoyage Systems, a vertically-striped buoy may be striped red and __________.

    a. green
    b. black
    c. white
    d. yellow
732: What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?

    a. Light List
    b. Coast Pilot
    c. Sailing Directions
    d. Pilot Chart
733: What would give the best radar echo?

    a. The beam of a three masted sailing vessel with all sails set.
    b. A 110-foot fishing vessel with a radar reflector in its rigging.
    c. A 300-foot tanker, bow on.
    d. A 600-foot freighter, beam on.
734: You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?

    a. 1.0 mile
    b. 1.5 miles
    c. 2.0 miles
    d. 2.5 miles
735: The period of the Earth's revolution from perihelion to perihelion is the __________.

    a. astronomical year
    b. anomalistic year
    c. solar year
    d. sidereal year
736: A line on a weather chart connecting places which have the same barometric pressure is called an __________.

    a. isotherm
    b. isallobar
    c. isobar
    d. isotope
737: What describes an ebb current?

    a. Horizontal movement of the water away from the land following low tide
    b. Horizontal movement of the water toward the land following low tide
    c. Horizontal movement of the water away from the land following high tide
    d. Horizontal movement of the water toward the land following high tide
738: Most GPS receivers use the Doppler shift of the carrier phase to compute __________.

    a. Latitude
    b. Longitude
    c. Speed
    d. Time
739: The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.

    a. 114°00'W
    b. 110°00'W
    c. 66°00'W
    d. 66°00'E
740: A very light breeze that causes ripples on a small area of still water is a __________.

    a. cat's paw
    b. hog's breath
    c. williwaw
    d. chinook
741: What is the light phase characteristic of a lighted isolated-danger mark?

    a. Interrupted quick flashing
    b. Very quick flashing
    c. Long flashing
    d. Group flashing
742: You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________.

    a. Coast Pilot
    b. harbor and coastal charts for ports of refuge enroute
    c. Sailing Directions (Enroute)
    d. Light List
744: A hand held instrument used to measure distances between objects and the ship is a __________.

    a. vernier
    b. psychrometer
    c. hygrometer
    d. stadimeter
745: Retrograde motion is the __________.

    a. movement of the points of intersection of the planes of the ecliptic and the equator
    b. apparent westerly motion of a planet with respect to stars
    c. movement of a superior planet in its orbit about the Sun
    d. movement of the celestial north pole in an elliptical pattern in space
745: Retrograde motion is the __________.

    a. movement of the points of intersection of the planes of the ecliptic and the equator
    b. apparent westerly motion of a planet with respect to stars
    c. movement of a superior planet in its orbit about the Sun
    d. movement of the celestial north pole in an elliptical pattern in space
746: Lines drawn through points on the Earth having the same atmospheric pressure are known as __________.

    a. isothermal
    b. millibars
    c. isobars
    d. seismics
747: The movement of water away from the shore or downstream is called a(n) __________.

    a. reversing current
    b. ebb current
    c. flood current
    d. slack current
748: You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies __________.

    a. to the north of you
    b. to the south of you
    c. dead ahead of you
    d. dead astern of you
749: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?

    a. 249°
    b. 256°
    c. 262°
    d. 268°
750: On a working copy of a weather map, a cold front is represented by what color line?

    a. Red
    b. Blue
    c. Alternating red and blue
    d. Purple
751: Under the IALA Buoyage Systems, a yellow buoy may mark __________.

    a. fish net areas
    b. spoil areas
    c. military exercise zones
    d. All of the above
752: Which publication would NOT be used on a voyage from Houston to New York?

    a. Coast Pilot
    b. Light List
    c. Radio Navigational Aids
    d. Sailing Directions (Enroute)
754: Deviation in a compass is caused by the __________.

    a. vessel's geographic position
    b. vessel's heading
    c. earth's magnetic field
    d. influence of the magnetic materials of the vessel
755: The sidereal day begins when the __________.

    a. Sun is over the lower branch of the reference meridian
    b. Sun is over the upper branch of the reference meridian
    c. first point of Aries is over the lower branch of the reference meridian
    d. first point of Aries is over the upper branch of the reference meridian
756: What is a common unit of measure for atmospheric pressure?

    a. centimeters
    b. Inches
    c. Degrees
    d. Feet
757: The term "flood current" refers to that time when the water __________.

    a. is flowing towards the land
    b. is moving towards the ocean
    c. level is not changing
    d. level is rising because of heavy rains
759: At 0000 you fix your position and plot a new DR track line. At 0200 you again fix your position and it is 0.5 mile west of your DR. Which statement is TRUE?

    a. The set is 090°, drift 0.5 knot.
    b. The set is 270°, drift 0.25 knot.
    c. The set is 270°, drift 0.5 knot.
    d. The set is 270°, drift 1.0 knot.
760: As a vessel changes course to starboard, the compass card in a magnetic compass __________.

    a. first turns to starboard then counterclockwise to port
    b. also turns to starboard
    c. remains aligned with compass north
    d. turns counterclockwise to port
761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.

    a. be spherical
    b. display a white light
    c. be lettered
    d. show a quick flashing light
762: Chart correction information is NOT disseminated through the __________.

    a. Summary of Corrections
    b. Local Notice to Mariners
    c. Daily Memorandum
    d. Chart Correction Card
763: Time signals broadcast by WWV and WWVH are transmitted __________.

    a. every 15 minutes
    b. every 30 minutes
    c. every hour
    d. continuously throughout day
764: Magnetic variation changes with a change in __________.

    a. the vessel's heading
    b. sea conditions
    c. seasons
    d. the vessel's position
765: Diurnal aberration is due to __________.

    a. motion of the Earth in its orbit
    b. rotation of the Earth on its axis
    c. the body's orbital motion during the time required for its light to reach the Earth
    d. a false horizon
766: Which position includes the effects of wind and current?

    a. Dead reckoning position
    b. Leeway position
    c. Set position
    d. Estimated position
767: What describes a flood current?

    a. Horizontal movement of the water toward the land after high tide
    b. Horizontal movement of the water toward the land after low tide
    c. Horizontal movement of the water away from the land following high tide
    d. Horizontal movement of the water away from the land following low tide
768: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

    a. wind circulation and forward motion of the storm
    b. extension of the low pressure ridge
    c. recurvature effect
    d. direction of circulation and pressure gradient
769: What does not contribute to the commercial GPS receiver position error?

    a. Satellite clock
    b. Ship's speed
    c. Atmospheric/Ionospheric propagation
    d. Satellites' orbits
770: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

    a. The course and speed made good should be determined and used to advance the LOP.
    b. The drift should be added to the ship's speed.
    c. The current should be ignored.
    d. The set should be applied to the second bearing.
771: Under the IALA Buoyage Systems, a spherical buoy will mark the __________.

    a. safe water
    b. port side of the channel
    c. a hazard to navigation
    d. the position of an underwater cable
772: You are hove to in a hurricane on a heading of 328°T. The wind is from 030° true at 119 knots. How should this be encoded on the weather report form under Nddff. (D041NG )

    a. 80312
    b. 83011
    c. 83099
    d. 80399
773: What is the basic principle of the magnetic compass?

    a. Magnetic materials of the same polarity repel each other and those of opposite polarity attract.
    b. The Earth's magnetic lines of force are parallel to the surface of the Earth.
    c. Magnetic meridians connect points of equal magnetic variation.
    d. The compass needle(s) will, when properly compensated, lie parallel to the isogonic lines of the Earth.
774: Variation is not constant; it is different with every change in __________.

    a. speed
    b. vessel heading
    c. geographical location
    d. cargo
775: A sidereal day is shorter than a solar day. This difference is due to __________.

    a. irregularities in the daily rotational rate of the Sun
    b. the space motion of the solar system
    c. the precession of the equinoxes
    d. the use of different reference points
776: You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.

    a. 4 hours
    b. 1 hour
    c. 30 minutes
    d. 5 minutes
777: With respect to a reversing current, slack water occurs when there is __________.

    a. little or no horizontal motion of the water
    b. little or no vertical motion of the water
    c. a weak ebb or flood current
    d. when winds cause water to back up in a river mouth
778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.

    a. from true north clockwise to 180°T
    b. from true north counterclockwise to 180°T
    c. from the bow counterclockwise to 180° relative
    d. from the direction of the storm's movement counterclockwise 180°
779: Which sextant shown has an index error of 0'20" on the arc? (D050NG )

    a. A
    b. B
    c. C
    d. D
780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.

    a. barometer
    b. wind vane
    c. anemometer
    d. thermometer
781: The IALA Buoyage Systems do NOT apply to __________.

    a. the sides and centerlines of navigable channels
    b. natural dangers and other obstructions, such as wrecks
    c. lighthouses and lightships
    d. areas in which navigation may be subject to regulation
782: Mariners are FIRST warned of serious defects or important changes to aids to navigation by means of __________.

    a. marine broadcast Notice to Mariners
    b. Weekly Notices to Mariners
    c. corrected editions of charts
    d. Light Lists
783: Magnetism which is present only when the material is under the influence of an external field is called __________.

    a. permanent magnetism
    b. induced magnetism
    c. residual magnetism
    d. terrestrial magnetism
784: Variation is the angular measurement between __________.

    a. compass north and magnetic north
    b. compass north and true north
    c. magnetic meridian and the geographic meridian
    d. your vessel's heading and the magnetic meridian
785: An amplitude of the Sun in high latitudes __________.

    a. is most accurate before sunrise
    b. is most accurate after sunset
    c. should only be observed when the Sun's lower limb is above the horizon
    d. is most accurate when the Sun's center is observed on the visible horizon
786: The greater the pressure difference between a high and a low pressure center, the __________.

    a. dryer the air mass will be
    b. cooler the temperature will be
    c. greater the force of the wind will be
    d. warmer the temperature will be
787: You are on a voyage from New Orleans to Boston. When navigating off the Florida coast, you will get the greatest benefit from the Gulf Stream if you navigate __________.

    a. about 45 miles east of Cape Canaveral
    b. about 25 miles east of Daytona Beach
    c. along the 50-fathom curve
    d. close inshore between Fowey Rocks and Jupiter Inlet
789: The dangerous semicircle of a hurricane in the Northern Hemisphere is that area of the storm __________.

    a. to the right of the storm's track
    b. measured from true north clockwise to 180°T
    c. measured from true north counterclockwise to 180°T
    d. between the ship's heading and the bearing to the eye
791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.

    a. X-shaped
    b. two black spheres
    c. a single red sphere
    d. a single red cone
792: Information about temporary, short term changes affecting the safety of navigation in U.S. waters is distributed to navigational interests by the __________.

    a. Daily Memorandum
    b. HYDROLANT or HYDROPAC broadcasts
    c. Local Notice to Mariners
    d. Summary of Corrections
793: The permanent magnetism of a vessel may change in strength due to __________.

    a. a collision with another vessel
    b. being moored on a constant heading for a long period of time
    c. being struck by lightning
    d. All of the above
795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.

    a. ecliptic
    b. diurnal circle
    c. altitude circle
    d. circle of position
796: Cyclones tend to move __________.

    a. perpendicular to the isobars in their warm sectors
    b. parallel to the isobars in their warm sectors
    c. parallel to the line of the cold front
    d. perpendicular to the line of the cold front
797: Which statement is TRUE concerning the current of the Gulf Stream?

    a. It reaches its daily maximum speed a few hours before the transit of the Moon.
    b. It is slower at the time of neap tides than at spring tides.
    c. When the Moon is at its maximum declination the stream is narrower than when the Moon is on the equator.
    d. Variations in the trade winds affect the current.
798: A HYDROLANT warning would normally be sent for all of the following EXCEPT __________.

    a. extinguishment of Robbins Reef Light in New York City's Upper Bay
    b. unexploded ordinance in ocean waters at a depth of 78 fathoms (143 meters)
    c. the presence of a large unwieldy tow in congested offshore water
    d. a report of an overdue ship
799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.

    a. green can buoy
    b. red can buoy
    c. green conical buoy
    d. red conical buoy
800: You are to sail from Elizabethport, NJ, on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 26 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?

    a. 0056
    b. 0124
    c. 0154
    d. 0218
801: You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?

    a. Alter course to leave the buoy to port
    b. Alter course to leave the buoy to starboard
    c. Pass the buoy close aboard on either side
    d. Pass the buoy well clear on either side
802: Which is a weekly publication advising mariners of important matters affecting navigational safety?

    a. Light List
    b. Notice to Mariners
    c. Coast Pilot
    d. Sailing Directions
803: Which buoy will NOT display white retroreflective material?

    a. Safe water mark
    b. Isolated danger mark
    c. Preferred channel mark
    d. Daymark of no lateral significance
803: Which buoy will NOT display white retroreflective material?

    a. Safe water mark
    b. Isolated danger mark
    c. Preferred channel mark
    d. Daymark of no lateral significance
804: A relative bearing is always measured from __________.

    a. true north
    b. magnetic north
    c. the vessel's beam
    d. the vessel's head
805: If the right ascension of a body is 9 hours, it also __________.

    a. is 135°
    b. corresponds to an SHA for the body of 45°
    c. means that the GP of the body is in the western hemisphere
    d. All of the above
806: Temperature and moisture characteristics are modified in a warm or cold air mass due to __________.

    a. pressure changes in the air mass
    b. movement of the air mass
    c. the heterogeneous nature of the air mass
    d. upper level atmospheric changes
807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.

    a. 35 nautical miles
    b. 25 nautical miles
    c. 15 nautical miles
    d. 5 nautical miles
808: On a working copy of a weather map, a stationary front is represented by which color line?

    a. Red
    b. Blue
    c. Alternating red and blue
    d. Purple
808: On a working copy of a weather map, a stationary front is represented by which color line?

    a. Red
    b. Blue
    c. Alternating red and blue
    d. Purple
809: The compass rose on a nautical chart indicates both variation and __________.

    a. deviation
    b. annual rate of variation change
    c. precession
    d. compass error
810: The position labeled B is a(n) __________. (D051NG )

    a. fix
    b. running fix
    c. estimated position
    d. dead reckoning position
811: Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.

    a. should be left to port when heading out to sea
    b. may be left close aboard on either side
    c. is on the north side of a point of interest
    d. is marking the preferred channel
812: You are informed of defects or changes in aids to navigation by __________.

    a. Local Notice to Mariners
    b. Weekly Notice to Mariners
    c. marine broadcasts
    d. All of the above
813: At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.

    a. the lines of force cross the equator on a 0°-180° alignment
    b. the quadrantal error is 0°
    c. there is no vertical component of the Earth's magnetic field
    d. the intercardinal headings have less than 1° error
814: Steam smoke will occur when __________.

    a. extremely cold air from shore passes over warmer water
    b. warm dry air from shore passes over cooler water
    c. cold ocean water evaporates into warm air
    d. cool rain passes through a warm air mass
815: When entering from seaward, a buoy displaying a composite group (2+1) flashing red light indicates __________.

    a. a junction with the preferred channel to the left
    b. a sharp turn in the preferred channel to the right
    c. the starboard side of the secondary channel
    d. a wreck to be left on the vessel's port side
816: Cyclones that have warm sectors usually move __________.

    a. westerly
    b. parallel to the isobars in the warm sector
    c. toward the nearest high pressure area
    d. faster than the accompanying cold front
817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?

    a. Falkland Current
    b. Brazil Current
    c. Norway Current
    d. Benguela Current
818: Ocean swells originating from a typhoon can move ahead of it at speeds near __________.

    a. 10 knots
    b. 20 knots
    c. 30 knots
    d. 50 knots
819: Which sextant has an index error of 4'20" off the arc? (D050NG )

    a. A
    b. B
    c. C
    d. D
820: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.

    a. dead-reckoning position
    b. running fix
    c. estimated position
    d. fix
821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.

    a. 06, 12 and 22A
    b. 01A, 05A and 07A
    c. 12, 13 and 14
    d. 14, 24 and 28
822: Charts should be corrected by using information published in the __________.

    a. Light List
    b. American Practical Navigator
    c. Notice to Mariners
    d. Coast Pilot
822: Charts should be corrected by using information published in the __________.

    a. Light List
    b. American Practical Navigator
    c. Notice to Mariners
    d. Coast Pilot
823: The greatest directive force is exerted on the magnetic compass when the __________.

    a. needles are nearly in line with the meridian
    b. vessel is near the magnetic poles
    c. variation is near zero
    d. vessel is near the magnetic equator
824: An "atoll cloud" forming over an island due to heating of the land during the daytime would be which type?

    a. Cirrus
    b. Cumulus
    c. Stratus
    d. Nimbus
825: While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?

    a. 000°T
    b. 090°T
    c. 150°T
    d. 240°T
826: In the U.S., in which direction do air masses usually move?

    a. Easterly
    b. Southerly
    c. Northerly
    d. Southwesterly
827: The Benguela Current flows in a __________.

    a. SW'ly direction along the NW coast of Africa
    b. S'ly direction off the East Coast of Australia
    c. NW'ly direction along the SW coast of Africa
    d. SW'ly direction along the SE coast of Greenland
828: The true wind has been determined to be from 210°T, speed 12 knots. You desire the apparent wind to be 30 knots from 10° on the port bow. What course must you steer, and what speed must you make for this to occur?

    a. 235°T, 18.6 knots
    b. 245°T, 20.0 knots
    c. 325°T, 22.4 knots
    d. 335°T, 23.6 knots
829: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

    a. The drift should be added to the ship's speed.
    b. The set should be applied to the second bearing.
    c. The current should be ignored.
    d. The course and speed made good should be determined and used to advance the LOP.
830: The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during __________.

    a. January, February and March
    b. April, May and June
    c. August, September and October
    d. July, November and December
831: Under the IALA-A Buoyage system, a buoy marking the starboard side of the channel when approaching from seaward may have a __________.

    a. triangular topmark
    b. red light
    c. can shape
    d. isophase light
832: What is the most important source of information to be used in correcting charts and keeping them up to date?

    a. Fleet Guides
    b. Notice to Mariners
    c. Sailing Directions
    d. Pilot Charts
833: The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the __________.

    a. north magnetic pole
    b. south magnetic pole
    c. magnetic prime vertical meridian
    d. magnetic equator
834: In many areas "atoll" clouds (clouds of vertical development) are produced over small islands. These are the result of __________.

    a. rising air currents produced by the warm islands
    b. warm air from the sea rising over higher land areas
    c. cool land air mixing with warm sea air
    d. descending air over the islands
835: When taking stars, those bodies to the east and west will __________.

    a. change altitude rapidly
    b. change altitude slowly
    c. remain in an almost fixed position
    d. appear to be moving in the plane of the horizon
836: In North America the majority of the weather systems move from __________.

    a. north to south
    b. south to north
    c. east to west
    d. west to east
837: The Brazil Current flows in which general direction?

    a. Northwesterly
    b. Southwesterly
    c. Southeasterly
    d. Northerly
838: A navigator fixing a vessel's position by radar __________.

    a. must use information from targets forward of the beam
    b. should never use radar bearings
    c. should only use radar bearings when the range exceeds the distance to the horizon
    d. can use radar information from one object to fix the position
839: When using a radar in an unstabilized mode, fixes are determined most easily from __________.

    a. ranges
    b. center bearings
    c. tangent bearings
    d. objects that are close aboard
840: Which position includes the effects of wind and current?

    a. Estimated position
    b. Set position
    c. Leeway position
    d. Dead reckoning position
841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.

    a. red light
    b. conical shape
    c. group-flashing light
    d. square topmark
842: Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.

    a. pilot charts
    b. Notices to Mariners
    c. Tide Tables
    d. Current Tables
843: The line which connects the points of zero magnetic dip is __________.

    a. an agonic line
    b. the magnetic equator
    c. a magnetic meridian
    d. All of the above
844: A cloud of marked vertical development (often anvil-shaped) would be classified as __________.

    a. cirrus
    b. cirrocumulus
    c. altocumulus
    d. cumulonimbus
845: During one synodic rotation, a body makes one complete turn relative to the __________.

    a. Earth
    b. Sun
    c. stars
    d. vernal equinox
846: Weather systems in the middle latitudes generally travel from __________.

    a. east to west
    b. north to south
    c. west to east
    d. None of the above
847: On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.

    a. set the vessel to the left
    b. set the vessel to the right
    c. offer resistance in the form of a head current
    d. furnish additional thrust in the form of a fair or following current
848: It is unlawful to approach within how many yards of a northern right whale?

    a. 200
    b. 300
    c. 400
    d. 500
849: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 30 feet (9.1 meters) and the visibility is 0.5 mile. At what approximate range will you first sight the light?

    a. 0.5 mile
    b. 1.4 miles
    c. 5.2 miles
    d. 12.0 miles
850: When is the peak of the hurricane season in the western North Pacific?

    a. January through March
    b. April through June
    c. July through October
    d. November through December
851: You would expect to find channels marked with the IALA-A Buoyage System in __________.

    a. the Philippines
    b. Australia
    c. Republic of Korea
    d. Chile
852: What is published by the U.S. Coast Guard?

    a. Light List
    b. Nautical Charts
    c. Tide Tables
    d. U.S. Coast Pilot
853: The standard magnetic compass heading differs from the true heading by __________.

    a. compass error
    b. latitude
    c. variation
    d. deviation
854: The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?

    a. Rain and poor visibility
    b. Dropping barometric pressure and backing wind in the Northern Hemisphere
    c. High winds and rising sea
    d. Severe thunderstorms
855: Which condition exists at the summer solstice in the Northern Hemisphere?

    a. The north polar regions are in continual darkness.
    b. The Northern Hemisphere is having short days and long nights.
    c. The Southern Hemisphere is having winter.
    d. The Sun shines equally on both hemispheres.
856: The flow of air around an anticyclone in the Southern Hemisphere is __________.

    a. clockwise and outward
    b. counterclockwise and outward
    c. clockwise and inward
    d. counterclockwise and inward
857: The current that, in many respects, is similar to the Gulf Stream is the __________.

    a. Kuroshio
    b. California Current
    c. Oyashio
    d. Benguela Current
858: Your ship is proceeding on course 320°T at a speed of 25 knots. The apparent wind is from 30° off the starboard bow, speed 32 knots. What is the relative direction, true direction and speed of the true wind?

    a. Relative 80°true 040°T, 16.2 knots
    b. Relative 40°true 080°T, 16.4 knots
    c. Relative 80° true 060°T, 15.2 knots
    d. Relative 60°true 040°T, 18.6 knots
859: At 1800 ZT on 31 October, your position is LAT 24°50'N, LONG 92°37'W. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

    a. 31123, 99929, 70249
    b. 31183, 99249, 79237
    c. 31243, 99249, 70926
    d. 01003, 99248, 70926
860: The Light List shows that a navigational light has a nominal range of 10 miles and a height above water of 38 feet (11.6 meters). Your height of eye is 52 feet (15.8 ,meters) and the visibility is 11.0 miles. At which approximate range will you first sight the light?

    a. 10.5 miles
    b. 13.9 miles
    c. 15.6 miles
    d. 18.0 miles
861: You would expect to find channels marked with the IALA-A Buoyage System in __________.

    a. Argentina
    b. Japan
    c. India
    d. Canada
862: The U.S. Coast Guard publishes __________.

    a. Light Lists
    b. U.S. Coast Pilots
    c. Radio Navigational Aids
    d. All of the above
863: The compass heading of a vessel differs from the true heading by __________.

    a. compass error
    b. variation
    c. magnetic dip
    d. deviation
864: Uniform, grayish-white cloud sheets that cover large portions of the sky, and are responsible for a large percentage of the precipitation in the temperate latitudes, are called __________.

    a. altostratus
    b. altocumulus
    c. cirrostratus
    d. cirrocumulus
865: The radius of a circle of equal altitude of a body is equal to the __________.

    a. coaltitude of the body
    b. altitude of the body
    c. codeclination of the body
    d. polar distance
866: Anticyclones are usually characterized by __________.

    a. dry, fair weather
    b. high winds and cloudiness
    c. gustiness and continuous precipitation
    d. overcast skies
867: Which ocean current is "warm" based on the latitude in which it originates and on the effect it has on climate?

    a. Kuroshio Current
    b. Benguela Current
    c. Peru Current
    d. California Current
868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?

    a. Continue on course as the warning is advisory in nature only.
    b. Send an AMVER report and acknowledge receipt of the warning.
    c. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence.
    d. Send a MERWARN message advising your position, course, speed and intentions.
869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.

    a. January through March
    b. April through May
    c. June through August
    d. September through November
870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.

    a. Nova Scotia
    b. Maine and Massachusetts
    c. Georgia and NE Florida
    d. California and Mexico
871: Under the IALA-A Buoyage System, a buoy marking the starboard side of the channel when approaching from seaward must have a(n) __________.

    a. pillar shape
    b. green color
    c. square topmark
    d. even number
872: Which agency publishes the Light Lists?

    a. United States Coast Guard
    b. National Ocean Service
    c. Oceanographic Office
    d. Army Corps of Engineers
873: Compass error is equal to the __________.

    a. deviation minus variation
    b. variation plus compass course
    c. combined variation and deviation
    d. difference between true and magnetic heading
874: Altocumulus clouds are defined as __________.

    a. high clouds
    b. middle clouds
    c. low clouds
    d. vertical development clouds
875: Sidereal hour angle is always __________.

    a. measured westward from the hour circle containing the first point of Aries
    b. measured from the point on the celestial sphere occupied by the Sun at the vernal equinox
    c. subtracted from the LHA of the star to obtain the LHA of Aries
    d. All of the above
876: A generally circular low pressure area is called a(n) __________.

    a. cyclone
    b. anticyclone
    c. cold front
    d. occluded front
877: Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the __________.

    a. Alaska Current
    b. Subarctic Current
    c. Kuroshio Current
    d. Oyashio Current
878: At 0600 ZT on 31 January, your position is LAT 00°49'S, LONG 84°27'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

    a. 30243, 90008, 30848
    b. 31003, 99049, 38427
    c. 31003, 99008, 30844
    d. 31063, 99049, 58427
879: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 346°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?

    a. 328°
    b. 323°
    c. 318°
    d. 314°
880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.

    a. 60°
    b. 90°
    c. 45°
    d. 30°
881: Under the IALA-A Buoyage System, when entering from seaward, a buoy indicating the preferred channel is to starboard may have a __________.

    a. green light
    b. long-flashing light characteristic
    c. square topmark
    d. conical shape
882: Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?

    a. Geographical positions outlining the area of the sector
    b. True bearings as observed from the ship toward the light
    c. An outline of the area of the sector
    d. True bearings as observed from the light toward the ship
883: When changing from a compass course to a true course you should apply __________.

    a. variation
    b. deviation
    c. variation and deviation
    d. a correction for the direction of current set
884: Which cloud type is normally associated with thunderstorms?

    a. Cirrus
    b. Stratus
    c. Cumulus
    d. Cumulonimbus
885: The daily path of a celestial body that is parallel to the celestial equator is the __________.

    a. altitude circle
    b. vertical circle
    c. diurnal circle
    d. hour circle
886: The circulation around a low pressure center in the Northern Hemisphere is __________.

    a. counterclockwise
    b. variable
    c. clockwise
    d. anticyclonic
887: Which current would you encounter on a direct passage from southern Africa to Argentina, South America?

    a. South Atlantic
    b. South Equatorial
    c. Agulhas
    d. Guinea
888: Recurvature of a hurricane's track usually results in the forward speed __________.

    a. increasing
    b. decreasing
    c. remaining the same
    d. varying during the day
889: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 47 feet (14.3 meters) and the visibility is 1.5 miles. At what approximate range will you first sight the light?

    a. 1.5 miles
    b. 2.0 miles
    c. 6.0 miles
    d. 12.7 miles
890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?

    a. Rhythm
    b. Period
    c. Intensity
    d. Color
891: Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.

    a. an even number
    b. an odd number
    c. a pillar shape
    d. horizontal bands
892: When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?

    a. Light List
    b. Notice to Mariners
    c. On the chart
    d. Coast Pilot
893: One point of a compass is equal to how many degrees?

    a. 7.5
    b. 11.25
    c. 17.5
    d. 22.5
893: One point of a compass is equal to how many degrees?

    a. 7.5
    b. 11.25
    c. 17.5
    d. 22.5
894: On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________.

    a. it will be preceded by a sudden increase in wind speed
    b. it will be preceded by a sudden decrease in wind speed
    c. the wind speed will not change as it passes
    d. the wind will back rapidly to left in a counterclockwise direction as it passes
895: The ecliptic is __________.

    a. the path the Sun appears to take among the stars
    b. the path the Earth appears to take among the stars
    c. a diagram of the zodiac
    d. a great circle on a gnomonic chart
896: The wind direction around a low pressure area in the Northern Hemisphere is __________.

    a. clockwise and inward
    b. clockwise and outward
    c. counterclockwise and inward
    d. counterclockwise and outward
897: What current flows southward along the west coast of the United States and causes extensive fog in that area?

    a. Davidson Current
    b. North Pacific Current
    c. Alaska Current
    d. California Current
898: At 1200 ZT, on 31 July, your position is LAT 24°33'N, LONG 173°05'W. You are preparing a weather report form, WS Form, B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

    a. 01003, 99245, 71731
    b. 01243, 92433, 71731
    c. 31243, 99245, 71731
    d. 31003, 92433, 71730
899: A latitude line will be obtained by observing a body __________.

    a. on the prime vertical
    b. on the celestial horizon
    c. at lower transit
    d. on the Greenwich meridian
900: An orange and white buoy with a rectangle on it is a(n) __________.

    a. informational buoy
    b. junction buoy
    c. safe water buoy
    d. All of the above
901: Under the IALA-A Buoyage System, a buoy indicating that the preferred channel is to port when entering from seaward, can have a __________.

    a. can shape
    b. group-flashing (2) light
    c. red-and-green vertical stripes
    d. green light
903: Eight points of a compass are equal to how many degrees?

    a. 45
    b. 90
    c. 180
    d. 360
904: All of the following are associated with cumulonimbus clouds EXCEPT __________.

    a. steady rainfall
    b. hail storms
    c. thunderstorms
    d. tornadoes or waterspouts
905: The Sun's center is coincident with the principal vertical circle when __________.

    a. in lower transit
    b. the hour circle and prime vertical are coincident
    c. the declination is zero degrees and the azimuth is exactly N 135°E
    d. the declination is zero degrees and the azimuth is exactly N 135°W
906: In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.

    a. low
    b. high
    c. warm front
    d. cold front
907: In which month will the equatorial counter current be strongest?

    a. January
    b. April
    c. August
    d. October
908: From LAT 07°12'N, LONG 80°00'W, to LAT 47°12'S, LONG 169°18'E, the initial great circle course angle is 137.25°. How would you name this course?

    a. N 137.25°E
    b. S 137.25°E
    c. N 137.25°W
    d. S 137.25°W
909: What is the average speed of movement of a hurricane prior to recurvature?

    a. 4 to 6 knots
    b. 6 to 8 knots
    c. 10 to 12 knots
    d. 15 to 20 knots
910: The Light List shows that a navigational light has a nominal range of 12 miles and a height above water of 25 feet (7.6 meters). Your height of eye is 38 feet (11.6 meters) and the visibility is 5.5 miles. At what approximate range will you FIRST sight the light?

    a. 5.5 miles
    b. 6.3 miles
    c. 8.0 miles
    d. 12.0 miles
911: Under the IALA-B Buoyage System, a buoy displaying a red light will __________.

    a. be left to starboard when entering from seaward
    b. show a light characteristic of Morse Code "A"
    c. be lettered
    d. have a radar reflector
912: The Light List Does NOT contain information on __________.

    a. the Global Positioning System (GPS)
    b. aeronautical lights useful for marine navigation
    c. radio beacon systems
    d. radio direction finder calibration stations
913: How many points are there in a compass card?

    a. 4
    b. 8
    c. 24
    d. 32
914: If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.

    a. rain
    b. hurricane weather
    c. fair weather
    d. fog setting in
915: The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.

    a. it crosses the December solstitial point
    b. it crosses the June solstitial point
    c. it is in upper transit
    d. its declination is zero
916: Stormy weather is usually associated with regions of __________.

    a. low barometric pressure
    b. high barometric pressure
    c. steady barometric pressure
    d. changing barometric pressure
917: As the South Equatorial Current approaches the east coast of Africa, it divides with the main part flowing south to form the warm __________.

    a. Agulhas Current
    b. Canary Current
    c. Benguela Current
    d. Madagascar Current
918: At 1200 ZT, on 31 August, your position is LAT 43°14'S, LONG 175°44'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )

    a. 01003, 94314, 51757
    b. 31003, 99432, 31757
    c. 31123, 99432, 31754
    d. 31243, 94314, 31757
919: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?

    a. The drift should be added to the ship's speed.
    b. The course and speed made good should be determined and used to advance the LOP.
    c. The current should be ignored.
    d. The set should be applied to the second bearing.
920: What is the average speed of the movement of a hurricane following the recurvature of its track?

    a. 5 to 10 knots
    b. 20 to 30 knots
    c. 40 to 50 knots
    d. Over 60 knots
921: Under the IALA-B Buoyage System, a conical buoy will be __________.

    a. red in color
    b. numbered with an odd number
    c. left to port when entering from seaward
    d. All of the above
922: How is the intensity of a light expressed in the Light Lists?

    a. Luminous range
    b. Geographic range
    c. Nominal range
    d. Meteorological range
923: A magnetic compass card is marked in how many degrees?

    a. 90
    b. 180
    c. 360
    d. 400
924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.

    a. nimbostratus
    b. stratus
    c. cirrocumulus
    d. cumulonimbus
925: Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming your vessel's location is still at the equator?

    a. 2208
    b. 2110
    c. 2158
    d. 2317
926: When a low pressure area is approaching, the weather generally __________.

    a. improves
    b. worsens
    c. remains the same
    d. is unpredictable
927: The set of the equatorial countercurrent is generally to the __________.

    a. north
    b. east
    c. southwest
    d. northwest
928: The position labeled "D" was plotted because __________. (D051NG )

    a. a dead reckoning position is plotted for each course change
    b. a dead reckoning position is plotted within 30 minutes of a running fix
    c. the vessel's speed changed at 1125
    d. All of the above
929: Which error is NOT included in the term "current" when used in relation to a fix?

    a. Poor steering
    b. Leeway
    c. Known compass error
    d. Ocean currents
930: Which statement about radio navigational warnings is TRUE?

    a. The topics for warnings included in HYDROLANTS, HYDROPACS, and NAVAREA warnings are the same.
    b. NAVAREA warnings concern only coastal navigation and inland navigation in large bays or sounds such as Puget Sound.
    c. The United States is responsible for NAVAREA warnings in the North Atlantic north of 7°N, and west of 15°W.
    d. Long range radio navigational warnings are usually broadcast by radiotelephone, radiotelegraph, and radio-teletypewriter.
931: Under the IALA-B Buoyage System, when entering from seaward, a buoy that should be left to port will be __________.

    a. black
    b. red
    c. green
    d. yellow
932: To find the specific phase characteristic of a lighthouse on a sound of the United States you would use the __________.

    a. American Practical Navigator
    b. Light List
    c. Nautical Chart Catalog
    d. U.S. Coast Pilot
933: How many degrees are there on a compass card?

    a. 360°
    b. 380°
    c. 390°
    d. 420°
934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.

    a. cirrus
    b. cirrostratus
    c. altostratus
    d. cirrocumulus
935: The Light List shows that a navigational light has a nominal range of 5 miles and a height above water of 21 feet (6.4 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 1.0 mile. At what approximate range will you first sight the light?

    a. 1.0 mile
    b. 1.5 miles
    c. 5.0 miles
    d. 11.7 miles
936: A cyclone in its final stage of development is called a(n) __________.

    a. tornado
    b. anticyclone
    c. occluded cyclone or occluded front
    d. polar cyclone
937: The north equatorial current flows to the __________.

    a. east
    b. northeast
    c. southwest
    d. west
938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.

    a. turn away from the whale and leave at full speed
    b. turn away from the whale and leave at slow speed
    c. slow to bare steerageway until the whale swims away
    d. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away
939: That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the __________.

    a. windward side
    b. leeward side
    c. safe semicircle
    d. dangerous semicircle
940: What is the length of a nautical mile?

    a. 6,076 feet
    b. 5,280 feet
    c. 2,000 yards
    d. 1,850 meters
941: While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take?

    a. Alter course to leave the buoy to port.
    b. Alter course to leave the buoy to starboard.
    c. Pass the buoy close aboard on either side.
    d. Pass the buoy well clear on either side.
942: Light Lists for coastal waters are __________.

    a. published every year and require no corrections
    b. published every second year and must be corrected
    c. published every five years and require no correction
    d. accurate thru NM number on title page and must be corrected
943: You should plot your dead reckoning position __________.

    a. when you obtain an estimated position
    b. ONLY in piloting waters
    c. at every speed change
    d. All of the above are correct.
944: High clouds, composed of small white flakes or scaly globular masses, and often banded together to form a "mackerel sky", would be classified as __________.

    a. cirrus
    b. cirrocumulus
    c. altostratus
    d. cumulonimbus
945: What is NOT a side of the navigational triangle used in sight reduction?

    a. Altitude
    b. Zenith distance
    c. Colatitude
    d. Polar distance
946: The wind circulation around a high pressure center in the Northern Hemisphere is __________.

    a. counterclockwise and moving towards the high
    b. counterclockwise and moving outward from the high
    c. clockwise and moving towards the high
    d. clockwise and moving outward from the high
947: The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.

    a. North Cape Current
    b. Labrador Current
    c. Greenland Current
    d. North Atlantic Current
949: In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.

    a. black can buoy
    b. red can buoy
    c. black conical buoy
    d. red conical buoy
950: Where is the dangerous semicircle located on a hurricane in the Southern Hemisphere?

    a. To the left of the storm's track
    b. To the right of the storm's track
    c. In the high pressure area
    d. On the south side
951: In which country would you expect the channels to be marked with the IALA-B Buoyage System?

    a. Poland
    b. Morocco
    c. Peru
    d. Saudi Arabia
952: What is TRUE concerning new editions of Light Lists?

    a. Supplements to new editions are issued monthly by the U.S. Coast Guard.
    b. New editions are published by the National Ocean Service.
    c. New editions are corrected through the date shown on the title page.
    d. None of the above
953: The magnetic compass operates on the principle that __________.

    a. like magnetic poles attract
    b. unlike magnetic poles repel
    c. unlike poles attract
    d. the poles of the compass line up with the geographic poles of the earth
954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.

    a. altostratus
    b. stratus
    c. cumulus
    d. cirrus
955: The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.

    a. reduced to the meridian and plotted as a latitude line
    b. calculated as a longitude line
    c. plotted by using an intercept from an assumed position
    d. plotted as an arc around the GP of the body
956: Good weather is usually associated with a region of __________.

    a. low barometric pressure
    b. high barometric pressure
    c. falling barometric pressure
    d. pumping barometric pressure
957: The Humboldt Current flows in which direction?

    a. North
    b. South
    c. East
    d. West
958: You are preparing a weather report form. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062° relative at 13 knots. You are on course 238°T at 22 knots. How should you encode group Nddff? (D041NG )

    a. 20220
    b. 20613
    c. 30219
    d. 32413
959: What is the index error of sextant B in illustration D050NG? (D050NG )

    a. 0'30" off the arc
    b. 1'00" off the arc
    c. 3'30" off the arc
    d. 1'30" on the arc
960: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 29 feet (8.8 meters). Your height of eye is 52 feet (15.8 meters) and visibility is 6.0 miles. At which approximate range will you first sight the light?

    a. 8.0 miles
    b. 11.0 miles
    c. 14.5 miles
    d. 16.0 miles
961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?

    a. Brazil
    b. Tanzania
    c. New Zealand
    d. Norway
962: Chart legends which indicate a conspicuous landmark are printed in __________.

    a. underlined letters
    b. boldfaced print
    c. italics
    d. capital letters
963: To center a compass bowl in its binnacle, you should have the ship on an even keel, heading north or south, and adjust the screws until __________.

    a. the compass heading is in line with the lubber's line
    b. there is no lost motion in the gimbal rings
    c. no change of heading by compass is observed if you raise and lower the heeling magnet
    d. the gimbal rings do not strike the compass frame when they are tilted
964: The thin, whitish, high clouds composed of ice crystals, popularly known as "mares' tails" are __________.

    a. cirrus
    b. cirrocumulus
    c. altostratus
    d. nimbostratus
965: In order for a star to be used for a sight at lower transit, the star must __________.

    a. be circumpolar
    b. have a declination equal to or greater than your latitude
    c. have a GHA of 180°
    d. have the SHA equal to or less than the LHA
966: Most high pressure areas in the United States are accompanied by __________.

    a. precipitation
    b. clear, cool weather
    c. humid, sticky weather
    d. cool fogs
967: On an Atlantic Ocean voyage from New York to Durban, South Africa, you should expect the Agulhas Current to present a strong __________.

    a. offshore set
    b. onshore set
    c. head current
    d. fair or following current
968: The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?

    a. I and II
    b. IV and XII
    c. V and X
    d. VI and VII
969: The population of northern right whales, an endangered species, numbers approximately __________.

    a. 300
    b. 5000
    c. 100,000
    d. 1,000,000
970: You are preparing a weather report form, WS Form B-80. The sky is overcast, and the anemometer indicates that the apparent wind is from 144° relative at 8 knots. You are on course 162°T at 15 knots. How should you encode group Nddff? (D041NG )

    a. 91521
    b. 83322
    c. 81408
    d. 01615
971: You are in British waters on course 090°T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030°T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________.

    a. south of this buoy
    b. west of this buoy
    c. north of this buoy
    d. east of this buoy
972: In which source could you find the number of a chart for a certain geographic area?

    a. Chart No. 1
    b. Catalog of Charts
    c. American Practical Navigator
    d. U.S. Coast Guard Light List
973: The heading of a vessel is indicated by what part of the compass?

    a. Card
    b. Needle
    c. Lubber's line
    d. Gimbals
974: Which cloud commonly produces a halo about the Sun or Moon?

    a. Cirrostratus
    b. Cirrocumulus
    c. Altostratus
    d. Altocumulus
975: The change in the length of the day becomes greater as latitude increases because of the __________.

    a. path of the ecliptic relative to the equator
    b. decreasing distance between meridians
    c. changing distance between the Earth and the Sun
    d. increased obliquity of the Sun's diurnal circle
976: The atmosphere in the vicinity of a high pressure area is called a(n) __________.

    a. anticyclone
    b. cold front
    c. occluded front
    d. cyclone
977: In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.

    a. Central North Atlantic Ocean
    b. Caribbean Sea
    c. Western North Pacific Ocean
    d. area off the west coast of South America
978: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

    a. recurvature effect
    b. extension of the low pressure ridge
    c. wind circulation and forward motion of the storm
    d. direction of circulation and pressure gradient
979: Which kind of conditions would you observe as the eye of a storm passes over your vessel's position?

    a. Huge waves approaching from all directions, clearing skies, light winds, and an extremely low barometer
    b. Flat calm seas, heavy rain, light winds, and an extremely low barometer
    c. Flat calm seas, heavy rain, light winds, and high pressure
    d. Huge waves approaching from all directions, clearing skies, light winds, and high pressure
980: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

    a. have either a double ebb or a double flood
    b. become weak and variable
    c. become reversing currents
    d. exceed the predicted velocities
981: The characteristic of a lighted cardinal mark may be __________.

    a. very quick flashing
    b. flashing
    c. fixed
    d. occulting
983: Error may be introduced into a magnetic compass by __________.

    a. making a structural change to the vessel
    b. a short circuit near the compass
    c. belt buckles
    d. All of the above
984: The bases of middle clouds are located at altitudes of between __________.

    a. 3,000 to 6,500 feet (914 to 1981 meters)
    b. 6,500 to 20,000 feet (1981 to 6096 meters)
    c. 10,000 to 35,000 feet (3048 to 10,668 meters)
    d. 20,000 to 60,000 feet (6096 to 18,288 meters)
985: A time diagram is a diagram on the plane of the __________.

    a. celestial meridian
    b. celestial equator
    c. celestial horizon
    d. principal vertical circle
986: A warm air mass is characterized by __________.

    a. stability
    b. instability
    c. gusty winds
    d. good visibility
987: Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?

    a. Iceland Current
    b. Baltic Current
    c. Labrador Current
    d. Baffin Current
988: You are preparing a weather report form, WS Form B-80. One-half of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 340° relative at 14 knots. You are on course 307°T at 12.6 knots. How should you encode group Nddff? (D041NG )

    a. 53414
    b. 54013
    c. 42205
    d. 43013
989: The Light List shows that a navigational light has a nominal range of 18 miles and a height above water of 22 feet (6.7 meters). Your height of eye is 16 feet (4.9 meters) and the visibility is 2.0 miles. At which approximate range will you first sight the light?

    a. 2.0 miles
    b. 2.7 miles
    c. 4.2 miles
    d. 5.8 miles
990: You plot a fix using three lines of position and find they intersect in a triangle. You should plot the position of the vessel __________.

    a. outside of the triangle
    b. anywhere in the triangle
    c. on the line of position from the nearest object, between the other two lines of position
    d. in the geometric center of the triangle
991: You are underway in the North Sea on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________.

    a. has a topmark of two cones with points down
    b. is a western quadrant buoy
    c. is painted yellow on the top half and black on the bottom
    d. exhibits a light with the characteristic of VQ(3)5s
992: Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?

    a. Pub. 117, Radio Navigational Aids
    b. Appropriate volume of the Sailing Directions
    c. Pub. 102, International Code of Signals
    d. Light List
993: When crossing the magnetic equator the __________.

    a. Flinders bar should be inverted
    b. heeling magnet should be inverted
    c. the quadrantal spheres should be rotated 180°
    d. Flinders bar should be moved to the opposite side of the binnacle
994: Which list of clouds is in sequence, from highest to lowest in the sky?

    a. Altostratus, cirrostratus, stratus
    b. Cirrostratus, altostratus, stratus
    c. Stratus, cirrostratus, altostratus
    d. Altostratus, stratus, cirrostratus
995: What is the equivalent of 83°29.6' in time units?

    a. 5h 47m 34.8s
    b. 5h 18m 22.7s
    c. 5h 01m 42.3s
    d. 5h 33m 58.4s
996: Warm air masses will generally have __________.

    a. turbulence within the mass
    b. stratiform clouds
    c. heavy precipitation
    d. good visibility
997: A coastal current __________.

    a. is generated by waves striking the beach
    b. flows outside the surf zone
    c. flows in a circular pattern
    d. is also known as a longshore current
998: The navigable semicircle of a tropical storm in the South Indian Ocean is located on which side of the storm's track?

    a. Rear
    b. Front
    c. Left
    d. Right
999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff? (D041NG )

    a. 80208
    b. 72218
    c. 72318
    d. 62324
1000: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )

    a. Continue on course until the range is closed, then alter course to the right.
    b. Continue on the present heading until the range is in line, then alter course to the left.
    c. Immediately alter course to the right to bring the range in line.
    d. Immediately alter course to 309°T to bring the range in line.
1001: While steaming in English waters on course 280°T, you sight a buoy showing a very quick-flashing (VQ) white light well to port. Maintaining course, you sight another buoy showing a quick-flashing (Q) white light. You should pass __________.

    a. north of the buoy
    b. west of the buoy
    c. east of the buoy
    d. south of the buoy
1002: What publication contains information about the port facilities in Cadiz, Spain?

    a. World Port Index
    b. United States Coast Pilot
    c. Nautical Index
    d. Sailing Directions
1003: The quadrantal spheres are used to __________.

    a. remove deviation on the intercardinal headings
    b. remove deviation on the cardinal compass headings
    c. remove heeling error
    d. compensate for induced magnetism in vertical soft iron
1004: A low, uniform layer of cloud resembling fog, but not resting on the ground, is called __________.

    a. cumulus
    b. nimbus
    c. stratus
    d. cirrus
1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________.

    a. 29.72 inches (1006 millibars)
    b. 29.83 inches (1010 millibars)
    c. 29.89 inches (1012 millibars)
    d. 29.93 inches (1014 millibars)
1006: An air mass is termed "warm" if __________.

    a. it is above 70°F
    b. the ground over which it moves is cooler than the air
    c. it originated in a high pressure area
    d. it originated in a low pressure area
1007: When a current flows in the opposite direction to the waves, the wave __________.

    a. length is increased
    b. height is increased
    c. velocity increases
    d. length is unchanged
1008: The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?

    a. 18.0 nm
    b. 14.8 nm
    c. 11.7 nm
    d. 6.0 nm
1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34°F, and the wet bulb thermometer reads 31°F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )

    a. 10340, 2127/
    b. 10111, 2104/
    c. 10011, 2104/
    d. 10340, 2031/
1010: What is a characteristic of a rhumb line?

    a. It is the shortest distance between two points on the Earth.
    b. It plots as a straight line on a Lambert conformal chart.
    c. It cuts each meridian at the same angle.
    d. The course angle constantly changes to form the loxodromic curve.
1011: You are underway in the North Sea on course 127°T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )

    a. Alter course to starboard until the buoy is at least two points on the port bow, then hold course.
    b. Alter course to port until the buoy is broad on the starboard quarter, then hold course.
    c. Change course to have the buoy close aboard either side.
    d. Ensure the bearings change to the right.
1012: General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?

    a. World Port Index
    b. Sailing Directions
    c. Distances Between Ports
    d. Coast Pilot
1013: The purpose of the soft iron spheres mounted on arms on the binnacle is to compensate for __________.

    a. the vertical component of the permanent magnetism of the vessel
    b. the residual deviation
    c. magnetic fields caused by electrical currents in the vicinity
    d. induced magnetism in the horizontal soft iron
1014: Relative humidity is the percentage of water vapor that is in the air as compared to the maximum amount it can hold at __________.

    a. a specific barometric pressure
    b. a specific temperature
    c. a specific wind speed
    d. any time
1015: Which statement about the time diagram shown is correct? (D005NG )

    a. The Greenwich hour angle of the Sun is greater than 180°.
    b. The meridian angle of the Sun is labeled west.
    c. The date of Greenwich is the day after the date for observer at M.
    d. The Sun has already passed the lower branch of the observer's meridian.
1016: A source of an air mass labeled mTw is __________.

    a. the equator
    b. the Gulf of Mexico
    c. Alaska
    d. Canada
1017: Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?

    a. The deflection of the current is to the left in the Northern Hemisphere.
    b. The Coriolis force is greater in the lower latitudes.
    c. The Coriolis force is more effective in deep water.
    d. All of the above
1018: An aneroid barometer reading should be corrected for differences in __________.

    a. elevation
    b. temperature
    c. wind speed
    d. latitude
1019: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 30°F (-1°), and the wet bulb thermometer reads 28°F (-2°C). Using the Ships Code Card, how would you encode the air temperature groups in the report? (D041NG )

    a. 10011, 2003/
    b. 11300, 2124/
    c. 11011, 2124/
    d. 11011, 2104/
1020: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?

    a. 5.6 miles
    b. 6.4 miles
    c. 9.8 miles
    d. 12.1 miles
1021: You are underway in the North Sea on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. To ensure that your vessel remains in the best navigable water you would __________.

    a. continue on course and ensure that the bearings change to the left
    b. pass between the buoy and another buoy showing a fixed white light
    c. alter course to port and pass the buoy close aboard to either side
    d. alter course to port and pass north of the buoy
1022: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 37 feet (11.6 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 24.8 nm
    b. 17.8 nm
    c. 15.9 nm
    d. 10.3 nm
1023: Which compensates for induced magnetism in the horizontal soft iron of a vessel?

    a. Iron spheres mounted on the binnacle
    b. A single vertical magnet under the compass
    c. The Flinders bar
    d. Magnets in trays inside the binnacle
1024: The dew point is reached when the __________.

    a. temperature of the air equals the temperature of the seawater
    b. atmospheric pressure is 14.7 lbs. per square inch
    c. relative humidity reaches 50%
    d. air becomes saturated with water vapor
1025: A first magnitude star is __________.

    a. 2.5 times as bright as a second magnitude star
    b. 3 times as bright as a second magnitude star
    c. 5 times as bright as a second magnitude star
    d. 10 times as bright as a second magnitude star
1026: An air mass that has moved down from Canada would most likely have the symbols __________.

    a. mPk
    b. cPk
    c. cTk
    d. cTw
1027: In the Northern Hemisphere the major ocean currents tend to flow __________.

    a. clockwise around the North Atlantic and North Pacific Oceans
    b. clockwise or counterclockwise depending on whether it is warm or cold current
    c. counterclockwise except in the Gulf Stream
    d. counterclockwise around the North Atlantic and North Pacific Oceans
1028: At what angle to the isobars do surface winds blow over the open sea?

    a. About 90°
    b. About 50°
    c. About 25°
    d. About 15°
1029: Which would be the subject of a NAVAREA warning?

    a. A drifting buoy sighted in mid-ocean
    b. Extinguishment of Wolf Trap Light located inside Chesapeake Bay
    c. All military exercises on the high seas involving four or more vessels
    d. Off-air times of radio beacons when scheduled for routine maintenance
1030: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 78°F, and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report? (D041NG )

    a. 10256, 2023/
    b. 10780, 2074/
    c. 00256, 0023/
    d. 10256, 2074/
1031: While steaming north of the Irish coast, you sight a buoy which shows the light rhythm shown in illustration D028NG. How would you pass this buoy? (D028NG )

    a. North of the buoy
    b. East of the buoy
    c. South of the buoy
    d. West of the buoy
1032: What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 9.6 nm
    b. 16.5 nm
    c. 18.6 nm
    d. 20.7 nm
1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.

    a. Flinders bar
    b. transverse magnets
    c. fore-and-aft magnets
    d. soft iron spheres on the sides of the compass
1034: The expression "the air is saturated" means __________.

    a. the relative humidity is 100%
    b. the vapor pressure is at its minimum for the prevailing temperature
    c. precipitation has commenced
    d. cloud cover is 100%
1035: The approximate positions of the stars are based on sidereal time, which is based upon rotation of the Earth relative to __________.

    a. winter solstice
    b. autumnal equinox
    c. summer solstice
    d. vernal equinox
1036: A frontal thunderstorm is caused by __________.

    a. pronounced local heating
    b. wind being pushed up a mountain
    c. a warm air mass rising over a cold air mass
    d. an increased lapse rate caused by advection of warm surface air
1037: Generally speaking, a ship steaming across the North Pacific from Japan to Seattle is likely to experience __________.

    a. adverse currents for practically the entire crossing
    b. favorable currents for practically the entire crossing
    c. favorable currents in the summer months and adverse currents in the winter months
    d. variable currents having no significant effect on the total steaming time
1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )

    a. 1054/, 2050/
    b. 10122, 2008/
    c. 1054/, 2047/
    d. 054//, 047//
1039: While taking weather observations, you determine that the wind is coming from the west. In the weather log, you would record the wind direction as __________.

    a. 000°
    b. 090°
    c. 180°
    d. 270°
1040: An occluded front is usually caused by a __________.

    a. cold front becoming stationary
    b. warm front becoming stationary
    c. cold front overtaking a warm front
    d. warm front dissipating
1041: You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white flashing light showing a group of two flashes. The buoy indicates you __________.

    a. must pass south of the buoy
    b. must pass north of the buoy
    c. should pass well clear on either side of the buoy
    d. must pass the buoy close to starboard
1042: What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 8.7 nm
    b. 9.9 nm
    c. 14.4 nm
    d. 15.9 nm
1043: You are about to go to sea and adjust the magnetic compass. To expedite the adjustment at sea, in what order should the following dockside adjustments be made?

    a. Flinders bar first, then the heeling magnet and spheres
    b. Heeling magnet first, then the Flinders bar and spheres
    c. Flinders bar first, then the spheres and heeling magnet
    d. Spheres first, then the Flinders bar and heeling magnet
1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?

    a. 16%
    b. 24%
    c. 39%
    d. 79%
1045: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?

    a. 6.2 miles
    b. 9.5 miles
    c. 12.9 miles
    d. 14.2 miles
1046: The probability of a sudden wind may be foretold by __________.

    a. a partly cloudy sky
    b. an overcast sky
    c. a fast approaching line of dark clouds
    d. the formation of cumulus clouds in the sky
1047: Which is NOT a contributing cause of ocean currents?

    a. Surface winds
    b. Density differences in the water
    c. Underwater topography
    d. Gravitational effects of celestial bodies
1048: The velocity of the current in large coastal harbors is __________.

    a. unpredictable
    b. generally too weak to be of concern
    c. predicted in Tidal Current Tables
    d. generally constant
1049: At 0000 you fix your position and change course to 270°T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?

    a. The set is 090°, drift 0.5 knot.
    b. The set is 090°, drift 1.0 knot.
    c. The set is 270°, drift 0.5 knot.
    d. The set is 270°, drift 1.0 knot.
1050: The passing of a low pressure system can be determined by periodically checking the __________.

    a. thermometer
    b. hygrometer
    c. barometer
    d. anemometer
1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.

    a. indicate that the deepest water in an area is on the named side of the mark
    b. indicate the safe side on which to pass a danger
    c. draw attention to a feature in the channel such as a bend, junction, bifurcation, or end of a shoal
    d. indicate the port and starboard sides of well-defined channels
1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 15.5 nm
    b. 13.4 nm
    c. 8.7 nm
    d. 6.9 nm
1053: Before a magnetic compass is adjusted certain correctors must be checked to ensure that they are free of permanent magnetism. These correctors are the __________.

    a. fore-and-aft and athwartships magnets
    b. dip needle and heeling magnet
    c. heeling magnet and Flinders bar
    d. Flinders bar and quadrantal spheres
1054: The dry-bulb temperature is 78°F (26°C) and the wet-bulb temperature is 68°F (20°C). What is the relative humidity?

    a. 10%
    b. 24%
    c. 56%
    d. 60%
1055: The radius of a circle of equal altitude for a body equals the body's __________.

    a. declination
    b. polar distance
    c. altitude
    d. zenith distance
1056: The steepness of a cold front depends on __________.

    a. the direction of wind around the front
    b. its velocity
    c. the temperature of the air behind the front
    d. the precipitation generated by the front
1057: One of the causes of ocean currents is density differences in the water. This is true because __________.

    a. in an area of high density the water's surface is lower than in an area of low density
    b. surface water flows from an area of high density to one of low density
    c. the lesser the density gradient the freer the water is to move
    d. it is the density differences that cause the currents to stay in the troughs
1058: You are preparing a weather report form, WS Form B-80. Your position is LAT 64°42'N, LONG 02°28'W. How would this be encoded? (D041NG )

    a. 90647, 90024
    b. 0647N, 00025
    c. 99647, 70025
    d. 9064N, 9025W
1059: The Light List shows that a navigational light has a nominal range of 17 miles and a height above water of 28 feet (8.5 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 11.0 miles. At what approximate range will you first sight the light?

    a. 11.0 miles
    b. 12.6 miles
    c. 15.7 miles
    d. 18.0 miles
1060: Isobars on a weather map are useful in predicting __________.

    a. temperature
    b. dew point
    c. wind velocity
    d. relative humidity
1061: In waters where the cardinal system is used you would expect to find danger __________.

    a. lying to the south of an eastern quadrant buoy
    b. lying to the south of a northern quadrant buoy
    c. lying to the east of an eastern quadrant buoy
    d. beneath or directly adjacent to the buoy
1062: What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 18.8 nm
    b. 19.3 nm
    c. 20.3 nm
    d. 24.8 nm
1063: When adjusting a magnetic compass using the fore-and-aft permanent magnets, you should __________.

    a. use the magnets one at a time, putting one in one side and then one on the opposite side, one step higher.
    b. use the magnets in pairs, starting at the top, with trays at the highest point of travel
    c. use the magnets in pairs, from the bottom up, with the trays at the lowest point of travel
    d. fill all the trays with magnets, then remove them one-by-one until the deviation is removed
1064: The dew point temperature is __________.

    a. always higher than the air temperature
    b. always lower than the air temperature
    c. equal to the difference between the wet and dry bulb temperatures
    d. the temperature at which the air is saturated with water vapor
1065: You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?

    a. Farther away to the east
    b. In the same position
    c. Nearby to the east
    d. Farther away to the west
1066: The slope of a warm front is about __________.

    a. 1 mile vertically to 10 miles horizontally
    b. 1 mile vertically to 50 miles horizontally
    c. 1 mile vertically to 150 miles horizontally
    d. 1 mile vertically to 500 miles horizontally
1067: The two most effective generating forces of surface ocean currents are __________.

    a. temperature and salinity differences in the water
    b. wind and density differences in the water
    c. water depth and underwater topography
    d. rotation of the Earth and continental interference
1068: A vessel sighting a northern right whale dead ahead should __________.

    a. maintain course and speed
    b. alter course to give a wide clearance
    c. report the whale's position to the Canadian Coast Guard
    d. All of the above
1069: What do the numbers on isobars indicate?

    a. barometric pressure
    b. temperature
    c. rain in inches
    d. wind speed
1070: Chart legends which indicate a conspicuous landmark are printed in __________.

    a. underlined letters
    b. capital letters
    c. italics
    d. boldface print
1071: A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the __________.

    a. north side of the mark
    b. west side of the mark
    c. east side of the mark
    d. south side of the mark
1072: What is the approximate geographic range of Assateague Light, VA, if your height of eye is 52 feet (15.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 14.1 nm
    b. 21.8 nm
    c. 23.0 nm
    d. 50.2 nm
1073: Chart legends printed in capital letters show that the associated landmark is __________.

    a. inconspicuous
    b. a radio transmitter
    c. conspicuous
    d. a government facility or station
1074: As the temperature for a given mass of air increases, the __________.

    a. dew point increases
    b. dew point decreases
    c. relative humidity increases
    d. relative humidity decreases
1075: The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.

    a. 1.5 and greater
    b. 1.25 and greater
    c. 1.0 and greater
    d. 0.5 and greater
1076: Which is TRUE concerning the speed of fronts?

    a. Cold fronts move faster than warm fronts.
    b. Cold fronts move slower than warm fronts.
    c. Cold fronts and warm fronts move with equal speed.
    d. Cold fronts move slower at the northern end and faster at the southern end.
1077: A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing, the water of __________.

    a. high density will be on the left in the Northern Hemisphere
    b. high density will be on the right in the Southern Hemisphere
    c. low density will be on the left in the Northern Hemisphere
    d. low density will be on the left in the Southern Hemisphere
1077: A current will develop between areas of different density in ocean waters. If you face in the same direction the current is flowing, the water of __________.

    a. high density will be on the left in the Northern Hemisphere
    b. high density will be on the right in the Southern Hemisphere
    c. low density will be on the left in the Northern Hemisphere
    d. low density will be on the left in the Southern Hemisphere
1078: The description "Racon" beside an illustration on a chart would mean a __________.

    a. radar conspicuous beacon
    b. radar transponder beacon
    c. radar calibration beacon
    d. circular radio beacon
1080: Information on northern right whales can be found in __________.

    a. the Coast Pilot
    b. HO 229
    c. the Nautical Almanac
    d. Ship's Medicine Chest and Medical Aid at Sea
1081: On a voyage along the coast of France, you sight a buoy with the top marks as shown. You are required to steer __________. (D026NG )

    a. west of the buoy
    b. east of the buoy
    c. south of the buoy
    d. north of the buoy
1082: Northern right whales can be identified by __________.

    a. whitish patches of skin on top of the head
    b. "V" shaped blow easily visible from ahead or behind
    c. no dorsal fin on the back
    d. All of the above
1083: Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________.

    a. induced magnetism in the vessel's horizontal soft iron
    b. change in the magnetic field when the vessel inclines from vertical
    c. permanent magnetism of the vessel
    d. magnetic fields caused by electrical currents in the vicinity
1084: As the temperature of an air mass decreases, the __________.

    a. absolute humidity decreases
    b. relative humidity increases
    c. specific humidity decreases
    d. dew point rises
1085: A chart position enclosed by a semi-circle is a(n) __________.

    a. fix
    b. estimated position
    c. dead reckoning position
    d. running fix
1086: When crossing a front isobars tend to __________.

    a. change from smooth curves within the air mass to sharp bends at the front
    b. change from sharp bends within the air mass to smooth curves at the front
    c. pass smoothly across the front with no change
    d. become closer together at the front and pass through in straight lines
1087: The velocity of a rotary tidal current will increase when the Moon is __________.

    a. new
    b. full
    c. at perigee
    d. All of the above
1088: Which statement about an estimated position is TRUE?

    a. It is more reliable than a fix based on radar bearings.
    b. It may be based on a single LOP or questionable data.
    c. When a 3-LOP fix plots in a triangle, the center of the triangle is the estimated position.
    d. It is usually based on soundings.
1089: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?

    a. 262°
    b. 269°
    c. 276°
    d. 281°
1090: What weather conditions would you expect to find at position A? (D049NG )

    a. Winds NW-W at 15 knots, partly cloudy, and slight seas
    b. winds SW-S at 20 knots, heavy rain, and rough seas
    c. Winds calm, light rain, and calm seas
    d. Winds NE-E at 20 knots, heavy rain, and rough seas
1091: The cardinal mark topmark shown in illustration D024NG represents which quadrant? (D024NG )

    a. Northern
    b. Eastern
    c. Southern
    d. Western
1092: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

    a. extension of the low pressure ridge
    b. wind circulation and forward motion of the storm
    c. recurvature effect
    d. direction of circulation and pressure gradient
1093: The Flinders bar on a magnetic compass compensates for the __________.

    a. induced magnetism in vertical soft iron
    b. induced magnetism in horizontal soft iron
    c. permanent magnetism in ship's steel
    d. vessel's inclination from the vertical
1094: A light, feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form, on objects whose temperatures are below freezing, is called __________.

    a. dew
    b. frost
    c. glaze
    d. snow
1095: The celestial coordinate of a star that is relatively constant in value is the __________.

    a. Greenwich hour angle
    b. local hour angle
    c. sidereal hour angle
    d. meridian angle
1096: With the passage of an occluded front the temperature __________.

    a. rises rapidly
    b. remains about the same
    c. drops rapidly
    d. depends on whether warm type or cold type occlusion
1097: The velocity of a rotary tidal current will be decreased when the Moon is __________.

    a. at apogee
    b. new
    c. full
    d. All of the above
1098: A chart position enclosed by a square is a(n) __________.

    a. fix
    b. estimated position
    c. dead reckoning position
    d. running fix
1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?

    a. 356°
    b. 003°
    c. 022°
    d. 038°
1101: In the North Sea area, you sight a buoy showing an uninterrupted quick-flashing white light. Which of the four topmarks shown will this buoy be fitted with under the IALA Buoyage system? (D031NG )

    a. A
    b. B
    c. C
    d. D
1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .

    a. 9.9 nm
    b. 14.3 nm
    c. 15.7 nm
    d. 17.4 nm
1103: The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?

    a. The Flinders bar
    b. The heeling magnet
    c. Quadrantal soft iron spheres
    d. Bar magnets in the binnacle
1104: Which condition(s) is(are) necessary for the formation of dew?

    a. Clear skies
    b. Calm air
    c. Earth's surface cooler than the dew point of the air
    d. All of the above
1105: The Light List shows that a navigational light has a nominal range of 22 miles and a height above water of 48 feet (14.6 meters). Your height of eye is 35 feet (10.7 meters) and the visibility is 20.0 miles. At what approximate range will you first sight the light?

    a. 10.5 nm
    b. 13.2 nm
    c. 14.7 nm
    d. 32.0 nm
1106: The legend/symbol which designates an occluded front is represented by a __________.

    a. red line
    b. purple line
    c. blue line
    d. dashed blue line
1108: Preferred channel buoys indicate the preferred channel to transit by __________.

    a. odd or even numbers
    b. the color of their top band
    c. the location of the buoy in the channel junction
    d. the buoy's light rhythms
1108: Preferred channel buoys indicate the preferred channel to transit by __________.

    a. odd or even numbers
    b. the color of their top band
    c. the location of the buoy in the channel junction
    d. the buoy's light rhythms
1109: You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?

    a. 000°
    b. 056°
    c. 090°
    d. 146°
1110: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?

    a. At the predicted time
    b. 30 minutes before the predicted time
    c. One hour after the predicted time
    d. 30 minutes before flood, one hour after an ebb
1111: Black double-cone topmarks are the most important feature, by day, of cardinal marks. Which of the four topmarks shown indicates the best navigable water lies to the west of the buoy? (D030NG )

    a. A
    b. B
    c. C
    d. D
1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30°N and 60°N is commonly called the __________.

    a. prevailing westerlies
    b. horse latitudes
    c. trade winds
    d. subpolar low pressure belts
1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30°N and 60°N is commonly called the __________.

    a. prevailing westerlies
    b. horse latitudes
    c. trade winds
    d. subpolar low pressure belts
1113: A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.

    a. the horizontal component of the permanent magnetism
    b. deviation caused by the vessel's inclination from the vertical
    c. induced magnetism in the horizontal soft iron
    d. induced magnetism in the vertical soft iron
1114: Mechanical lifting of air by the upslope slant of the terrain is called __________.

    a. vertical lifting
    b. convective lifting
    c. advective lifting
    d. topographic lifting
1115: Which light characteristic may be used on a special purpose mark?

    a. Flashing
    b. Occulting
    c. Equal interval
    d. Quick flashing
1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.

    a. cold front
    b. occluded front
    c. stationary front
    d. warm front
1118: When entering from seaward, a buoy displaying a single-flashing red light indicates __________.

    a. a junction with the preferred channel to the left
    b. the starboard side of the channel
    c. a sharp turn in the channel to the right
    d. a wreck to be left on the vessel's port side
1119: The position labeled "D" was plotted because __________. (D051NG )

    a. the vessel's speed changed at 1125
    b. a dead reckoning position is plotted within 30 minutes of a running fix
    c. a dead reckoning position is plotted for each course change
    d. All of the above
1120: You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?

    a. 090°
    b. 132°
    c. 180°
    d. 222°
1121: The articulated light is superior to other types of buoys because __________.

    a. the radar reflectors reflect better signals
    b. fog horn signals travel farther to sea
    c. it is equipped with strobe lights
    d. it has a reduced watch circle
1122: A barometer showing falling pressure indicates the approach of a __________.

    a. high pressure system
    b. low pressure system
    c. high dew point
    d. low dew point
1123: What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?

    a. Quadrantal spheres
    b. Heeling magnets
    c. Athwartships magnets
    d. Fore-and-aft magnets
1124: The region containing 3/4 of the mass of the atmosphere and the region to which are confined such phenomena as clouds, storms, precipitation and changing weather conditions is called __________.

    a. stratosphere
    b. troposphere
    c. stratopause
    d. tropopause
1125: The Light List shows that a navigational light has a nominal range of 19 miles and a height above water of 52 feet (15.8 meters). Your height of eye is 42 feet (12.8 meters) and the visibility is 10.0 miles. At what approximate range will you first sight the light?

    a. 10.0 miles
    b. 16.0 miles
    c. 17.3 miles
    d. 19.0 miles
1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.

    a. front
    b. isobar
    c. isotherm
    d. equipotential line
1127: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.

    a. at slack water
    b. at flood tide
    c. when there is a following current
    d. at high water
1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?

    a. 10 January
    b. 27 March
    c. 22 June
    d. 8 October
1129: The motion of celestial bodies relative to other celestial bodies is known as __________.

    a. space motion
    b. apparent motion
    c. diurnal motion
    d. actual motion
1130: During daylight savings time the meridian used for determining the time is located farther __________.

    a. west in west longitude and east in east longitude
    b. east in west longitude and west in east longitude
    c. west
    d. east
1131: On navigational aids, what does the light characteristic "Fl(2+1)" mean?

    a. A flashing light combined with a fixed light of greater brightness
    b. Light flashes combined in groups, with a different number of flashes in each group
    c. A light showing groups of two or more flashes at regular intervals
    d. A fixed light varied at regular intervals by groups of two or more flashes of greater brightness
1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

    a. radio beacon
    b. 5-fathom curve
    c. prohibited area
    d. lighted buoy
1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.

    a. radio beacon
    b. 5-fathom curve
    c. prohibited area
    d. lighted buoy
1133: Which compensates for errors introduced when the vessel heels over?

    a. The soft iron spheres on the arms of the binnacle
    b. Magnets placed in trays inside the binnacle
    c. A single vertical magnet beneath the compass
    d. The Flinders bar
1134: The Earth's irregular heating is caused by __________.

    a. the time of day
    b. the seasons
    c. geography
    d. All of the above
1135: A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.

    a. GHA of 285°50'
    b. SHA of 74°10'
    c. SHA of 285°50'
    d. LHA of 74°10'E
1136: When a warm air mass overtakes and replaces a cold air mass, the contact surface is called a(n) __________.

    a. warm front
    b. cold front
    c. line squall
    d. occluded front
1137: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.

    a. become weak and variable
    b. exceed the predicted velocities
    c. become reversing currents
    d. have either a double ebb or a double flood
1138: On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. You must pass __________.

    a. northward of the buoy
    b. southward of the buoy
    c. eastward of the buoy
    d. westward of the buoy
1139: A star is observed at lower transit. The line of position derived from this sight is __________.

    a. on the prime vertical
    b. a latitude line
    c. a longitude line
    d. of no special significance
1140: What is the light characteristic of a lighted, preferred-channel buoy?

    a. Group flashing
    b. Composite group flashing
    c. Interrupted quick flashing
    d. Fixed and flashing
1141: What is characteristic of an isophase light?

    a. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse
    b. 2 sec. flash, 5 sec. eclipse
    c. 1 sec. flash, 1 sec. eclipse
    d. 6 sec. flash, 3 sec. eclipse
1142: Which weather conditions would you expect to find 100 miles East of position "B"? (D049NG )

    a. Winds NW at 20.5 knots, steady warm temperature, high seas
    b. Winds calm, falling temperature, clear skies, high seas
    c. Winds WSW, steady temperature, scattered clouds, moderate seas
    d. None of the above
1144: Freezing salt water spray should be anticipated when the air temperature drops below what temperature?

    a. 32°F (0.0°C)
    b. 28°F (-2.2°C)
    c. 0°F (-17.8°C)
    d. -40°F (-28.9°C)
1145: The GHA of a star __________.

    a. increases at a rate of approximately 15° per hour
    b. increases at a rate of approximately 4° per hour
    c. decreases at a rate of approximately 15° per hour
    d. decreases at a rate of approximately 4° per hour
1145: The GHA of a star __________.

    a. increases at a rate of approximately 15° per hour
    b. increases at a rate of approximately 4° per hour
    c. decreases at a rate of approximately 15° per hour
    d. decreases at a rate of approximately 4° per hour
1146: What is true about a front?

    a. A front is a boundary between two air masses.
    b. There are abrupt temperature differences on opposite sides of a front.
    c. The pressure tendencies are different on opposite sides of a front.
    d. All of the above
1147: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at which time in relation to the predicted time of the favorable current?

    a. One hour after
    b. At the predicted time
    c. 30 minutes before
    d. 30 minutes before flood, one hour after an ebb
1148: The numeral in the center of a wind rose circle on a pilot chart indicates the __________.

    a. total number of observations
    b. average wind force on the Beaufort scale
    c. average wind force in knots
    d. percentage of calms
1149: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights, as shown, on your starboard beam. You should __________. (D047NG )

    a. ensure your ship will NOT block the channel or obstruct the range while at anchor
    b. drop the anchor immediately as the range lights mark an area free of obstructions
    c. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor
    d. NOT drop the anchor until the lights are in line
1150: You are on course 312°T. To check the speed of your vessel you should observe a celestial body on which bearing?

    a. 312°
    b. 000°
    c. 090°
    d. 222°
1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?

    a. A safe-water buoy will display red and white vertical stripes of reflective material.
    b. All reflective material is white because it is the most visible at night.
    c. A special-purpose mark will display either red or green reflective material to agree with its shape.
    d. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color.
1152: When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.

    a. 3 meters
    b. 20 meters
    c. 100 meters
    d. 200 meters
1153: Heeling error is defined as the change of deviation for a heel of __________.

    a. 2°While the vessel is on an intercardinal heading
    b. 1°While the vessel is on a compass heading of 000°
    c. 2° and is constant on all headings
    d. 1° while the vessel is on a compass heading of 180°
1154: The speed at which an ocean wave system advances is called __________.

    a. wave length
    b. ripple length
    c. group velocity
    d. wave velocity
1155: Which aid is NOT marked on a chart with a magenta circle?

    a. Radar station
    b. Aero light
    c. Radio beacon
    d. Radar transponder beacon
1156: When cold air displaces warm air you have a(n) __________.

    a. cold front
    b. occluded front
    c. stationary front
    d. warm front
1157: How many slack tidal currents usually occur each day on the east coast of the United States?

    a. One
    b. Two
    c. Three
    d. Four
1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )

    a. Cirrostratus
    b. Cirrocumulus
    c. Altocumulus
    d. Nimbostratus
1159: Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by __________.

    a. the differing light colors
    b. one system having odd numbers while the other system has even numbers
    c. one system using horizontal bands while the other system uses vertical stripes
    d. the difference in the periods of the light
1160: What will be the velocity of the tidal current at 0.2 mile SSW of Clason Point, NY, at 1125 on 17 April 1983?

    a. 0.5 knot
    b. 0.8 knot
    c. 1.1 knots
    d. 1.9 knots
1161: What is characteristic of an occulting light?

    a. 1 sec. flash, 2 sec. eclipse, 1 sec. flash, 5 sec. eclipse
    b. 5 sec. flash, 5 sec. eclipse
    c. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse
    d. 6 sec. flash, 6 sec. eclipse
1162: A line connecting all possible positions of your vessel at any given time is a __________.

    a. longitude line
    b. latitude line
    c. line of position
    d. fix
1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.

    a. divisional parts
    b. coefficients
    c. fractional parts
    d. equations
1164: The largest waves (heaviest chop) will usually develop where the wind blows __________.

    a. at right angles to the flow of the current
    b. against the flow of the current
    c. in the same direction as the flow of the current
    d. over slack water
1165: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )

    a. Maury lightship is visible for 17 miles.
    b. There is a dangerous eddy southeast of Beito Island.
    c. There is a 12-meter deep west of Beito Island and inside the 5-meter line.
    d. The bottom to the south-southeast of the lightship is soft coral.
1166: A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.

    a. upper front aloft
    b. cyclone
    c. occluded front
    d. cold front
1167: The velocity of the current in large coastal harbors is __________.

    a. unpredictable
    b. predicted in Tidal Current Tables
    c. generally constant
    d. generally too weak to be of concern
1168: Which type of cloud is indicated by the number 4? (D039NG )

    a. Altocumulus
    b. Cirrostratus
    c. Cumulus
    d. Altostratus
1169: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "O" represents __________. (D042NG )

    a. sandstorms
    b. thunderstorms
    c. snow
    d. rain showers
1170: Which statement concerning the illustration is correct? (Soundings and heights are in meters) (D010NG )

    a. Maury Lightship swings about her anchor on a circle with a 21-meter diameter.
    b. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum.
    c. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island.
    d. The position of the lightship is indicated by the center of the star on the symbol's mast.
1171: A light that has a light period shorter than its dark period is described as __________.

    a. flashing
    b. pulsating
    c. occulting
    d. alternating
1172: Which position shown would likely have stratus or stratocumulus clouds, occasional light drizzle, steady southerlies around 10 knots, and steady temperatures? (D049NG )

    a. B
    b. C
    c. D
    d. E
1173: When adjusting a magnetic compass for error, a deviation table should be made __________.

    a. before correcting for any deviation
    b. after correcting for variation
    c. after adjusting the fore-and-aft and athwartships permanent magnets
    d. before the quadrantal correctors are placed on the compass
1174: Your vessel is enroute from Japan to Seattle and is located at position I on the weather map. You should experience which weather condition? (D013NG )

    a. Clear skies with warm temperatures
    b. Steady precipitation
    c. Overcast skies with rising temperature
    d. Thundershowers
1175: Solid green arrows on the main body of a pilot chart indicate __________.

    a. prevailing wind directions
    b. prevailing ocean current directions
    c. probable surface current flow
    d. shortest great circle routes
1176: After a cold front passes, the barometric pressure __________.

    a. drops, and the temperature drops
    b. drops, and the temperature rises
    c. rises, and the temperature drops
    d. rises, and the temperature rises
1177: The magnitude of three stars is indicated. Which star is the brightest?

    a. Canopus - 0.9
    b. Vega + 0.1
    c. Antares + 1.2
    d. Cannot be determined; magnitude indicates size not brightness
1178: The range of tide is the __________.

    a. distance the tide moves out from the shore
    b. difference between the heights of high and low tide
    c. duration of time between the high and low tide
    d. maximum depth of the water at high tide
1179: Which type of cloud is indicated by the number 3? (DO39NG )

    a. Cirrocumulus
    b. Altocumulus
    c. Nimbostratus
    d. Cumulus
1180: You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?

    a. 180°
    b. 238°
    c. 328°
    d. 090°
1181: An occulting light is one in which __________.

    a. the period of darkness exceeds the period of light
    b. there is only a partial eclipse of the light
    c. the periods of light and darkness are equal
    d. the period of light exceeds the period of darkness
1182: Referring to the illustration, which wind speed is reported in position C? (D049NG )

    a. 3 knots
    b. 10 knots
    c. 20 knots
    d. 30 knots
1183: The principal purpose of magnetic compass adjustment is to __________.

    a. reduce the variation as much as possible
    b. reduce the deviation as much as possible
    c. reduce the magnetic dip as much as possible
    d. allow the compass bowl to swing freely on its gimbals
1184: Your position X is at LAT 35°S. Which winds are you experiencing? (D009NG )

    a. Northeasterly
    b. Northwesterly
    c. Southeasterly
    d. Southwesterly
1185: An orange and white buoy with a rectangle on it displays __________.

    a. directions
    b. distances
    c. locations
    d. All of the above
1186: As a cold front passes an observer, pressure __________.

    a. drops and winds become variable
    b. rises and winds become gusty
    c. drops and winds become gusty
    d. rises and winds become variable
1187: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.

    a. 016°
    b. 106°
    c. 254°
    d. 286°
1188: The magnitude of three stars is indicated. Which star is the brightest?

    a. Antares + 1.2
    b. Altair + 0.9
    c. Vega + 0.1
    d. Cannot be determined; magnitude indicates size not brightness
1189: Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the ____________ .

    a. Greenwich celestial meridian
    b. hour circle of the body
    c. local celestial meridian
    d. vertical circle of the body
1190: Which type of cloud is indicated by the number 2? (D039NG )

    a. Cumulus
    b. Cirrostratus
    c. Stratocumulus
    d. Altostratus
1191: You plot a fix using three lines of position and find they intersect in a triangle. The actual position of the vessel __________.

    a. is outside of the triangle
    b. may be anywhere in the triangle
    c. may be inside or outside of the triangle
    d. is the geometric center of the triangle
1192: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?

    a. 284°
    b. 303°
    c. 329°
    d. 342°
1193: If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________.

    a. increases
    b. remains the same
    c. decreases
    d. is unimportant and may be neglected
1194: In the Northern Hemisphere, an observer at point II in the weather system should experience a wind shift from the __________. (D014NG )

    a. southwest, clockwise to northwest
    b. northeast, clockwise to west-southwest
    c. northeast, counterclockwise to northwest
    d. east, counterclockwise to south-southwest
1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

    a. dead reckoning position
    b. fix
    c. estimated position
    d. None of the above
1195: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.

    a. dead reckoning position
    b. fix
    c. estimated position
    d. None of the above
1196: In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________.

    a. warm front
    b. tropical cyclone
    c. anticyclone
    d. cold front
1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.

    a. 014°
    b. 076°
    c. 170°
    d. 256°
1198: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a dust storm? (D042NG )

    a. I
    b. H
    c. O
    d. P
1199: The Sailing Directions (Enroute) contain information on __________.

    a. well-charted inner dangers
    b. port facilities
    c. coastal anchorages
    d. offshore traffic separation schemes
1200: You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which the current does not exceed 0.3 knot?

    a. 0911 to 0955
    b. 0940 to 1010
    c. 0955 to 1044
    d. 0935 to 1017
1201: What is NOT true concerning color sectors of lights?

    a. Color sectors are expressed in degrees from the light toward the vessel.
    b. Color sectors may indicate dangerous waters.
    c. Color sectors may indicate the best water across a shoal.
    d. Color sectors may indicate a turning point in a channel.
1202: As shown in the illustration, which wind speeds are reported at position A? (D049NG )

    a. 10 knots
    b. 15 knots
    c. 20 knots
    d. 25 knots
1203: If the compass heading and the magnetic heading are the same then __________.

    a. the deviation has been offset by the variation
    b. there is something wrong with the compass
    c. the compass is being influenced by nearby metals
    d. there is no deviation on that heading
1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )

    a. A
    b. B
    c. C
    d. D
1205: How is the annual rate of change for magnetic variation shown on a pilot chart?

    a. Gray lines on the uppermost inset chart
    b. Red lines on the main body of the chart
    c. In parenthesis on the lines of equal magnetic variation
    d. Annual rate of change is not shown.
1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.

    a. passage of a warm front
    b. passage of a cold front
    c. winds shifting counterclockwise in the Northern Hemisphere
    d. stationary high pressure systems
1207: What will be the velocity of the tidal current at New London Harbor Entrance, CT, at 1615 EST (ZD +5) on 26 December 1983?

    a. 0.2 knot
    b. 0.4 knot
    c. 0.7 knot
    d. 0.9 knot
1208: Which type of cloud is indicated by the number 1? (D039NG )

    a. Cirrus
    b. Altostratus
    c. Altocumulus
    d. Nimbostratus
1209: You are on course 201°T. To check the speed of your vessel you should observe a celestial body on which bearing?

    a. 090°
    b. 111°
    c. 180°
    d. 201°
1210: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )

    a. Alter course to the right to 309°T or more to bring the range in line.
    b. Maintain course as it is normal for the range to open as you get close.
    c. Alter course to the left until the range closes, then steer to the left of 306°T.
    d. Alter course to the left to close the range, then alter course to 309°T.
1211: Red sectors of navigation lights warn mariners of __________.

    a. floating debris
    b. heavily trafficked areas
    c. recently sunken vessels
    d. shoals or nearby land
1213: If the magnetic heading is greater than the compass heading, the deviation is __________.

    a. east
    b. west
    c. north
    d. south
1214: The letter B in the diagram represents the __________. (D006NG )

    a. sensible horizon
    b. visible horizon
    c. celestial horizon
    d. geoidal horizon
1215: Daylight savings time is a form of zone time that adopts the time __________.

    a. two zones to the east
    b. two zones to the west
    c. one zone to the east
    d. one zone to the west
1216: In the Northern Hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a __________.

    a. cold front has passed
    b. low pressure center is approaching
    c. stationary front exists
    d. high pressure center has passed
1217: What will be the velocity and direction of the tidal current at Old Ferry Point, NY, at 1340 EST (ZD +5) on 5 February 1983?

    a. 0.8 knot at 060°T
    b. 0.8 knot at 240°T
    c. 1.0 knot at 076°T
    d. 1.4 knots at 076°T
1217: What will be the velocity and direction of the tidal current at Old Ferry Point, NY, at 1340 EST (ZD +5) on 5 February 1983?

    a. 0.8 knot at 060°T
    b. 0.8 knot at 240°T
    c. 1.0 knot at 076°T
    d. 1.4 knots at 076°T
1219: Which sextant in illustration D043NG reads 29°42.5'? (D043NG )

    a. A
    b. B
    c. C
    d. D
1220: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.

    a. the position of underwater cables
    b. a hazard to navigation
    c. the port side of the channel
    d. safe water
1221: On a chart, the characteristic of the light on a lighthouse is shown as flashing white with a red sector. The red sector __________.

    a. indicates the limits of the navigable channel
    b. indicates a danger area
    c. is used to identify the characteristics of the light
    d. serves no significant purpose
1222: On entering from seaward, a starboard side daymark will __________.

    a. show a fixed red light if lighted
    b. show a Morse (A) white light
    c. be square in shape
    d. have an even number if numbered
1223: The difference between magnetic heading and compass heading is called __________.

    a. variation
    b. deviation
    c. compass error
    d. drift
1224: NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the conversion table found __________.

    a. in the Light List
    b. in Bowditch Vol. II
    c. on the chart
    d. All of the above
1225: The term "Western Rivers," when it refers to regulations requiring towing vessels to carry navigational-safety equipment, charts or maps, and publications, includes the _____________ .

    a. Mississippi River and its tributaries
    b. Port Allen - Morgan City Alternate Route
    c. Red River and the Old River
    d. All of the above
1226: Cumulonimbus clouds are most likely to accompany a(n) __________.

    a. high pressure system
    b. cold front
    c. warm front
    d. occluded front
1227: What will be the direction and velocity of the tidal current at Provincetown Harbor, MA, at 1405 DST (ZD +4) on 5 May 1983?

    a. 0.0 knot at 135°T
    b. 0.2 knot at 135°T
    c. 0.4 knot at 315°T
    d. 0.6 knot at 315°T
1228: "An electronic or electric device that indicates the rate of turn of a vessel," defines a/an _____________ .

    a. magnetic compass
    b. gyro-compass
    c. swing meter
    d. odometer
1229: The initial great circle course angle between LAT 23°00'S, LONG 42°00'W and LAT 34°00'S, LONG 18°00'E is 063.8°. What is the true course?

    a. 063.8°T
    b. 116.2°T
    c. 243.8°T
    d. 296.2°T
1230: Weather forecast messages are usually __________.

    a. given only to TV stations
    b. transmitted only by commercial broadcast stations
    c. broadcast in plain language
    d. broadcast immediately on VHF Channel 16 and 2182 kHz
1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?

    a. Geographical positions outlining the area of the sector
    b. True bearings as observed from the light toward a vessel
    c. True bearings as observed from a vessel toward the light
    d. Bearings given in the Light List are always magnetic
1232: Entering from seaward, triangular-shaped daymarks are used to mark __________.

    a. the starboard side of the channel
    b. the centerline of the channel
    c. an obstruction where the preferred channel is to starboard
    d. special purpose areas
1233: Deviation is the angle between the __________.

    a. true meridian and the axis of the compass card
    b. true meridian and the magnetic meridian
    c. magnetic meridian and the axis of the compass card
    d. axis of the compass card and the degaussing meridian
1234: Which information does the outer ring of a compass rose on a nautical chart provide?

    a. Variation
    b. True directions
    c. Magnetic directions
    d. Annual rate of variation change
1235: Weather information provided by the National Weather Service (NWS) advisories should be used along with __________.

    a. the Tide Tables and Tidal Current Tables
    b. the local Notice to Mariners
    c. weather maps and local knowledge
    d. any U.S. Coast Pilot
1236: After the passage of a cold front the visibility_______. _

    a. does not change
    b. improves rapidly
    c. improves only slightly
    d. becomes poor
1237: What will be the velocity of the tidal current at Port Royal, VA, at 1505 DST (ZD +4) on 4 June 1983?

    a. 0.0 knot
    b. 0.1 knot
    c. 0.4 knot
    d. 0.7 knot
1238: What will be the height of tide at Three Mile Harbor Entrance, Gardiners Bay, NY, at 0700 (ZD +5) on 14 Nov 1983?

    a. 1.1 feet (0.3 meters)
    b. 1.7 feet (0.5 meters)
    c. 1.9 feet (0.6 meters)
    d. 2.2 feet (0.7 meters)
1239: While taking weather observations, you determine that the wind is blowing from the northeast. You would record the wind direction in the weather log as __________.

    a. 045°
    b. 090°
    c. 135°
    d. 225°
1240: Weather information is available from __________.

    a. commercial radio broadcasts
    b. the Coast Guard on scheduled marine information broadcasts
    c. VHF-FM continuous marine weather broadcasts provided by the National Weather Service
    d. All of the above
1241: Which picture shows a fixed and flashing light? (D034NG )

    a. A
    b. B
    c. C
    d. D
1242: Daymarks marking the starboard side of the channel when going towards the sea are __________.

    a. green squares
    b. green triangles
    c. red squares
    d. red triangles
1243: Magnetic heading differs from compass heading by __________.

    a. compass error
    b. true heading
    c. variation
    d. deviation
1245: You can follow the approach of a dangerous cyclonic storm by inspecting __________.

    a. a newspaper, a weather map, a weather fax, or a weather forecast
    b. the National Weather Service Observing Handbook No.1, Marine Surface Observations
    c. the Coast Pilot or Sailing Directions
    d. the sky overhead
1246: What weather change accompanies the passage of a cold front in the Northern Hemisphere?

    a. Wind shift from northeast clockwise to southwest
    b. Steady dropping of barometric pressure
    c. Steady precipitation, gradually increasing in intensity
    d. A line of cumulonimbus clouds
1247: What is the predicted velocity of the tidal current 2 miles west of Southwest Ledge for 2330 DST (ZD +4) on 7 September 1983?

    a. 1.3 knots
    b. 1.6 knots
    c. 1.9 knots
    d. 2.2 knots
1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?

    a. 2.1 feet
    b. 1.7 feet
    c. 1.2 feet
    d. 0.6 foot
1249: What is the light characteristic of a lighted, preferred-channel buoy?

    a. Fixed and flashing
    b. Continuous quick
    c. Isophase
    d. Composite group-flashing
1250: Daylight savings time is a form of zone time that adopts the time __________.

    a. one zone to the east
    b. one zone to the west
    c. two zones to the east
    d. two zones to the west
1251: A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________.

    a. 1.0 second duration
    b. 1.5 seconds duration
    c. 2.0 seconds duration
    d. 3.0 seconds duration
1252: Port side daymarks may be __________.

    a. numbered
    b. octagonal
    c. black and white
    d. of any shape
1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.

    a. deviation
    b. variation
    c. compass error
    d. dip
1254: Lighted white and orange buoys must show which color light?

    a. Orange
    b. White
    c. Red
    d. Alternating yellow and white
1255: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.

    a. extension of the low pressure ridge
    b. direction of circulation and pressure gradient
    c. recurvature effect
    d. the wind circulation and forward motion of the storm
1256: A cold front moving in from the northwest can produce __________.

    a. thunderstorms, hail, and then rapid clearing
    b. increasing cloud cover lasting for several days
    c. lengthy wet weather
    d. low ceilings with thick cirrus clouds
1257: What will be the velocity of the tidal current 1.0 mile southwest of Lewis Pt., RI, at 1501 EST (ZD +5) on 4 April 1983?

    a. 0.7 knot
    b. 1.4 knots
    c. 1.6 knots
    d. 1.9 knots
1258: You should log all barometer readings taken at sea __________.

    a. regularly
    b. at least once during each watch
    c. more often under changeable weather conditions
    d. All of the above
1259: General information on enroute weather and climate is found in __________.

    a. the Sailing Directions and the Coast Pilot
    b. a weather fax
    c. the Local Notice to Mariners
    d. the Light List
1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?

    a. -.3 foot (-0.1 meter)
    b. -.6 foot (-0.2 meter)
    c. 1.3 feet (0.4 meter)
    d. 1.6 feet (0.5 meter)
1261: A light having characteristics which include color variations is defined as __________.

    a. switching
    b. alternating
    c. oscillating
    d. fluctuating
1262: A safe water daymark has what shape?

    a. Triangular
    b. Diamond
    c. Circular
    d. Octagonal
1263: The compass deviation changes as the vessel changes __________.

    a. geographical position
    b. speed
    c. heading
    d. longitude
1265: When reporting wind direction, you should give the direction in __________.

    a. true degrees
    b. magnetic compass degrees
    c. relative degrees
    d. isobaric degrees
1266: A line of clouds, sharp changes in wind direction, and squalls are most frequently associated with a(n) __________.

    a. occluded front
    b. warm front
    c. cold front
    d. warm sector
1267: What will be the velocity of the tidal current at Coxsackie, NY, at 0945 EST (ZD +5) on 11 March 1983?

    a. 0.3 knot
    b. 0.7 knot
    c. 1.2 knots
    d. 1.9 knots
1268: On a nautical chart, the inner ring of a compass rose indicates __________.

    a. true directions
    b. compass error
    c. deviation
    d. magnetic directions
1269: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?

    a. 20.1 miles
    b. 16.0 miles
    c. 12.8 miles
    d. 7.6 miles
1271: Which word indicates color variation in the characteristics of a light?

    a. Opposing
    b. Changing
    c. Reversing
    d. Alternating
1272: What are the colors of a mid-channel daymark?

    a. Black and red
    b. Red and white
    c. Green and red
    d. Green and white
1273: Deviation changes with a change in __________.

    a. latitude
    b. heading
    c. longitude
    d. sea conditions
1274: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a sandstorm? (D042NG )

    a. H
    b. O
    c. P
    d. K
1275: How is variation indicated on a small-scale nautical chart?

    a. Magnetic compass table
    b. Magnetic meridians
    c. Isogonic lines
    d. Variation is not indicated on small-scale nautical charts.
1276: Which weather change accompanies the passage of a cold front in the Northern Hemisphere?

    a. Wind shift from northeast, clockwise to southwest
    b. Steady dropping of barometric pressure
    c. Steady precipitation, gradually increasing in intensity
    d. A line of cumulonimbus clouds
1277: The velocity and direction of the tidal current at Port Morris, NY, at 1135 DST (ZD +4) on 13 May 1983 will be __________.

    a. negligible at 220°T
    b. 3.1 knots at 045°T
    c. 1.2 knots at 220°T
    d. 1.0 knot at 045°T
1278: The difference between the heights of low and high tide is the __________.

    a. depth
    b. distance
    c. range
    d. period
1279: For 3 November 1983, at 0830 EST (ZD +5) at Catskill, NY, what is the predicted height of tide?

    a. +0.1 foot (+0.0 m)
    b. -0.6 foot (-0.2 m)
    c. +0.9 foot (+0.3 m)
    d. -1.3 feet (-0.4 m)
1280: A current perpendicular to a vessel's track has the greatest effect on the vessel's course made good __________.

    a. at high vessel speeds
    b. at low vessel speeds
    c. in shallow water
    d. in deep water
1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.

    a. set
    b. frequency
    c. period
    d. function
1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.

    a. set
    b. frequency
    c. period
    d. function
1282: Entering from sea, a daymark on the port side of the channel would be indicated on a chart by a __________.

    a. red triangle with the letter R
    b. white triangle with the letters RG
    c. green square with the letter G
    d. white square with the letters GR
1283: The error in a magnetic compass caused by the vessel's magnetism is called __________.

    a. variation
    b. deviation
    c. compass error
    d. bearing error
1284: The Sailing Directions (Enroute) contain information on all of the following EXCEPT __________.

    a. ocean currents
    b. outer dangers to navigation
    c. tidal currents
    d. major port anchorages
1285: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the time to intercept if you make 13 knots?

    a. 4h 55m
    b. 4h 36m
    c. 3h 59m
    d. 3h 44m
1286: Which condition will occur after a cold front passes?

    a. Temperature rises
    b. Stratus clouds form
    c. Pressure decreases
    d. Humidity decreases
1287: What will be the velocity of the tidal current 4.5 miles east of Smith Point, VA, at 0630 DST (ZD +4) on 6 May 1983?

    a. 0.3 knot
    b. 0.5 knot
    c. 0.7 knot
    d. 1.0 knot
1288: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 2310 EST (ZD +5)?

    a. 19.2 feet (5.9 meters)
    b. 20.8 feet (6.3 meters)
    c. 24.7 feet (7.5 meters)
    d. 25.8 feet (7.9 meters).
1289: A body can only be observed at lower transit when __________.

    a. the declination is the opposite name to the latitude
    b. the algebraic sum of the colatitude and declination exceeds 90°
    c. the observer is in high latitudes above either polar circle
    d. the body is circumpolar
1290: In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?

    a. National Geospatial-Intelligence Agency
    b. U.S. Hydrological Survey
    c. U.S. Coast Guard
    d. American Meteorological Service
1291: The period of a lighted aid to navigation refers to the __________.

    a. date of construction or establishment
    b. length of time between flashes of the light
    c. time required for the longest flash of each cycle
    d. time required for the light to complete each cycle
1292: A triangular daymark would be colored __________.

    a. red
    b. red and white
    c. green
    d. green and white
1293: Deviation is caused by __________.

    a. changes in the earth's magnetic field
    b. nearby magnetic land masses or mineral deposits
    c. magnetic influence inherent to that particular vessel
    d. the magnetic lines of force not coinciding with the lines of longitude
1295: The best estimate of the wind direction at sea level can be obtained from observing the direction of the __________.

    a. cloud movement
    b. vessel heading
    c. waves
    d. swells
1296: After a cold front passes the barometric pressure usually __________.

    a. fluctuates
    b. remains the same
    c. remains the same, with clouds forming rapidly
    d. rises, often quite rapidly, with clearing skies
1297: What will be the velocity of the tidal current at Bournedale, MA, at 1135 DST (ZD +4) on 3 May 1983?

    a. 1.1 knots
    b. 2.3 knots
    c. 3.0 knots
    d. 3.6 knots
1298: The vertex of a great circle track is in LONG 109°E. An eastbound vessel would cross the equator in LONG __________.

    a. 161°W
    b. 161°E
    c. 19°E
    d. 19°W
1299: What will be the time (ZD +5) of the second high tide at Weymouth Fore River Bridge, MA, on 12 November 1983?

    a. 1639
    b. 1643
    c. 1647
    d. 1650
1300: You are approaching a sea buoy which emits a racon signal. This signal is triggered by which type of radar?

    a. 3 cm
    b. 10 cm
    c. Both 3 cm and 10 cm
    d. Signal does not depend on radar type.
1301: The four standard light colors used for lighted aids to navigation are red, green, white, and __________.

    a. purple
    b. orange
    c. blue
    d. yellow
1302: What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?

    a. Color and shape
    b. Size
    c. Method of construction
    d. Signal characteristics
1303: Compass deviation is caused by __________.

    a. magnetism from the earth's magnetic field
    b. misalignment of the compass
    c. magnetism within the vessel
    d. a dirty compass housing
1304: The distance to the nearest vertex from any point on a great circle track cannot exceed __________.

    a. 5400 nautical miles
    b. 5840 nautical miles
    c. 6080 nautical miles
    d. 10,800 nautical miles

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