This is an interactive test. Read each question and select the proper answer by clicking on the appropriate answer. If a "Y" appears, your choice is correct. If a "N" appears, more study may be in order.
11: A buoy having red and green horizontal bands would have a light characteristic of __________.
N a. interrupted quick flashing Y b. composite group flashing N c. Morse (A) N d. quick flashing 35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 47: The range of tide is the __________.
N a. distance the tide moves out from the shore N b. duration of time between high and low tide Y c. difference between the heights of high and low tide N d. maximum depth of the water at high tide 63: A "full service" Loran-C receiver will provide __________.
N a. matching pulse rates of at least 20 stations N b. an automatic on-and-off switch N c. a horizontal matching of all delayed hyperbolic signals Y d. automatic signal acquisition and cycle matching 87: A tide is called diurnal when __________.
Y a. only one high and one low water occur during a lunar day N b. the high tide is higher and the low tide is lower than usual N c. the high tide and low tide are exactly six hours apart N d. two high tides occur during a lunar day 92: When utilizing a Pacific Coast chart, the reference plane of soundings is __________.
N a. mean low water springs N b. mean low water Y c. mean lower low water N d. lowest normal low water 125: The GMT is 0445 and your zone description is +1. Your zone time is __________.
N a. 0445 Y b. 0345 N c. 0545 N d. 1545 171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
Y a. safe water N b. a fish trap area N c. a hazard to navigation N d. a bifurcation in the channel 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?
N a. The current is westerly at 0.5 knot. N b. You must increase speed to compensate for the current. N c. The current cannot be determined. Y d. The drift is 0.25 knot. 298: A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
Y a. 7°W N b. 73°E N c. 73°W N d. 173°W 300: Which of the symbols shown represents a warm front? (D018NG )
N a. A N b. B Y c. C N d. D 345: A navigator fixing a vessel's position by radar __________.
N a. should never use radar bearings N b. should only use radar bearings when the range exceeds the distance to the horizon Y c. can use radar information from one object to fix the position N d. must use information from targets forward of the beam 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 441: A yellow buoy may exhibit a(n) __________.
N a. fixed red light Y b. flashing light N c. white light N d. occulting light 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?
N a. 1612 N b. 1630 Y c. 1653 N d. 1718 484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.
Y a. 30.05 inches of mercury N b. 30.05 millimeters of mercury N c. 30.05 millibars N d. falling 534: What is TRUE concerning an anemometer on a moving vessel?
N a. It measures true wind speed. N b. It measures true wind speed and true wind direction. Y c. It measures apparent wind speed. N d. It measures apparent wind speed and true wind direction. 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?
N a. 50 to 80 miles Y b. 80 to 100 miles N c. 100 to 150 miles N d. 150 to 250 miles 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?
Y a. The ARPA will generate data as if the target was still being tracked by radar. N b. The ARPA will give an audible and/or visual lost target alarm. N c. The ARPA will generate data based on sea return echoes from the vicinity where the target was lost. N d. The ARPA has lost all "memory" of the target and must recompute the target data. 675: 15° of latitude is equal to __________.
N a. 600 miles Y b. 900 miles N c. 1200 miles N d. 1500 miles 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?
N a. 209° Y b. 270° N c. 299° N d. 000° 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 )
N a. 30243, 90008, 30848 N b. 31003, 99049, 38427 Y c. 31003, 99008, 30844 N d. 31063, 99049, 58427 899: A latitude line will be obtained by observing a body __________.
N a. on the prime vertical N b. on the celestial horizon Y c. at lower transit N d. on the Greenwich meridian 912: The Light List Does NOT contain information on __________.
N a. the Global Positioning System (GPS) Y b. aeronautical lights useful for marine navigation N c. radio beacon systems N d. radio direction finder calibration stations 924: The form of cloud often known as "mackerel sky" which is generally associated with fair weather is __________.
N a. nimbostratus N b. stratus Y c. cirrocumulus N d. cumulonimbus 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 )
Y a. 10256, 2023/ N b. 10780, 2074/ N c. 00256, 0023/ N d. 10256, 2074/ 1056: The steepness of a cold front depends on __________.
N a. the direction of wind around the front Y b. its velocity N c. the temperature of the air behind the front N d. the precipitation generated by the front 1140: What is the light characteristic of a lighted, preferred-channel buoy?
N a. Group flashing Y b. Composite group flashing N c. Interrupted quick flashing N d. Fixed and flashing 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 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 __________.
N a. in the Light List N b. in Bowditch Vol. II N c. on the chart Y d. All of the above 1242: Daymarks marking the starboard side of the channel when going towards the sea are __________.
Y a. green squares N b. green triangles N c. red squares N d. red triangles 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?
N a. 20.1 miles N b. 16.0 miles Y c. 12.8 miles N d. 7.6 miles 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1278: The difference between the heights of low and high tide is the __________.
N a. depth N b. distance Y c. range N d. period 1326: A cloud sequence of cirrus, cirrostratus, and altostratus clouds followed by rain usually signifies the approach of a(n) __________.
N a. occluded front N b. stationary front Y c. warm front N d. cold front 1373: The reaction of a gyrocompass to an applied force is known as __________.
Y a. precession N b. earth rate N c. gyroscopic inertia N d. gravity effect 1401: The maximum distance at which a light may be seen under existing visibility conditions is called __________.
N a. nominal range Y b. luminous range N c. charted range N d. geographic range 1434: What is NOT a characteristic of cardinal marks?
N a. Yellow and black bands N b. White lights Y c. Square or triangular topmarks N d. Directional orientation to a hazard 1462: Altocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 3 N c. 4 Y d. 5 1502: You are running parallel to the coast and take a running fix using bearings of the same object. If you are making less speed than used for the running fix, in relation to the position indicated by the fix, you will be __________.
Y a. closer to the coast N b. farther from the coast N c. on the track line ahead of the fix N d. on the track line behind the fix 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 1646: Which picture in illustration D034NG shows a flashing light? (D034NG )
N a. A N b. B Y c. C N d. D 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1754: The dumping of refuse in a lock is permitted __________.
N a. when approved by the lockmaster N b. when locking downbound Y c. at no time N d. during high water only 1765: Which meteorological feature controls the climate of the Gulf and the Gulf Coast area during late spring and summer?
Y a. The Bermuda High N b. The doldrums N c. The horse latitudes N d. Tropical cyclones 1808: A white buoy with an open-faced orange diamond on it indicates __________.
Y a. danger N b. vessels are excluded from the area N c. the buoy is a mooring buoy N d. operating restrictions are in effect 1926: The prime vertical is the great circle on the celestial sphere that passes through the __________.
N a. celestial poles and the zenith Y b. zenith, nadir and the east point of the horizon N c. celestial poles and the celestial body N d. zenith, nadir and celestial body 1955: The letter A in illustration D006NG represents the __________.
N a. geoidal horizon Y b. sensible horizon N c. celestial horizon N d. visible horizon 1958: The spinning of a celestial body about its axis is known as __________.
Y a. rotation N b. revolution N c. space motion N d. nutation 2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
Y a. U.S. Army Corps of Engineers Regulations (Blue Book) N b. Nautical Almanac for the year N c. Sailing Directions N d. Light List Vol. V 2216: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres out. Y b. Move the quadrantal spheres in. N c. If the spheres are in as far as possible replace them with smaller spheres. N d. If the spheres are out as far as possible replace them with smaller spheres. 2274: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are to port you should lower the athwartships tray. N b. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should reverse the magnets. N c. If the red ends of the magnet are aft, and the fore-and-aft tray is at the top, you should add some more magnets. Y d. If the red ends of the magnets are aft you should lower the fore-and-aft tray. 2317: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and your height of eye is 25 feet (7.6 meters), at what approximate distance will you sight the light?
Y a. 10.0 miles N b. 12.9 miles N c. 14.2 miles N d. 17.0 miles 2632: A section of the river that is narrower than usual and is often navigable from bank to bank is a __________.
Y a. chute N b. stabilized channel N c. slough N d. navigable pass 2790: A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 800 feet, where is the approximate location of the pivot point of the unit?
N a. At the head of the tow Y b. 250 feet from the head of the tow N c. 400 feet from the head of the tow N d. 600 feet from the head of the tow 2804: The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used __________.
N a. when the declination and latitude are of different names N b. when the declination is greater than and the same name as the latitude N c. if the vessel is stopped or making bare steerageway Y d. on a fast vessel on northerly or southerly headings 2842: The draw span of a floating drawbridge may be marked with __________.
N a. two white lights Y b. a yellow diamond N c. flashing blue lights N d. three red lights on each side of the draw 2989: On 13 November 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 110°31.2'. The height of eye is 46 feet and the index error is 2.0' off the arc. The horizontal parallax is 61.3'. What is the observed altitude (Ho)?
N a. 70°41.4 N b. 70°15.4' Y c. 70°11.4' N d. 70°02.2 3122: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to ___.
N a. 96 characters Y b. 158 characters N c. 256 characters N d. 384 characters