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.
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?
Y a. 0659 N b. 0652 N c. 1859 N d. 1852 104: What should you apply to a fathometer reading to determine the depth of water?
N a. Subtract the draft of the vessel. Y b. Add the draft of the vessel. N c. Subtract the sea water correction . N d. Add the sea water correction. 159: The apparent wind can be zero when the true wind is from __________.
N a. ahead and equal to the ship's speed Y b. astern and equal to the ship's speed N c. ahead and equal to twice the ship's speed N d. astern and equal to twice the ship's speed 186: In the doldrums you will NOT have __________.
N a. high relative humidity N b. frequent showers and thunderstorms Y c. steep pressure gradients N d. frequent calms 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?
N a. 060°T N b. 090°T Y c. 150°T N d. 240°T 250: Weather systems in the middle latitudes generally travel from __________.
Y a. west to east N b. east to west N c. north to south N d. None of the above 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?
N a. 001° at 0.7 knot Y b. 018° at 0.4 knot N c. 052° at 0.6 knot N d. 089° at 0.9 knot 314: Which of these sextant errors is nonadjustable?
N a. Prismatic error N b. Graduation error N c. Centering error Y d. All of the above 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 __________.
N a. abyssal plain Y b. continental shelf N c. borderland N d. offshore terrace 457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4).
N a. 3.0 feet N b. 3.5 feet N c. 4.0 feet Y d. 4.4 feet 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?
N a. 313° N b. 314° Y c. 316° N d. 317° 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?
N a. 30.42 inches (1030 millibars) Y b. 30.45 inches (1031 millibars) N c. 30.50 inches (1032 millibars) N d. 30.53 inches (1033 millibars) 614: A marine chronometer should be rewound once every __________.
N a. 12 hours Y b. day N c. 3 days N d. week 635: A low HDOP (Horizontal Dilution of Precision) number such as 2 indicates a __________.
N a. poor fix Y b. good fix N c. poor signal quality N d. good signal quality 665: 17 degrees of latitude is equal to __________.
N a. 68 miles N b. 510 miles Y c. 1020 miles N d. 4080 miles 714: When using the ARPA in heavy rain, which action should you take?
N a. Increase the radar gain to pick up weak echoes through the rain. N b. Increase the STC setting to reduce close-in spurious signals. Y c. Navigate as though the effective range of the radar has been reduced. N d. Increase the range of the inner and outer guard rings. 740: A very light breeze that causes ripples on a small area of still water is a __________.
Y a. cat's paw N b. hog's breath N c. williwaw N d. chinook 744: A hand held instrument used to measure distances between objects and the ship is a __________.
N a. vernier N b. psychrometer N c. hygrometer Y d. stadimeter 848: It is unlawful to approach within how many yards of a northern right whale?
N a. 200 N b. 300 N c. 400 Y d. 500 862: The U.S. Coast Guard publishes __________.
Y a. Light Lists N b. U.S. Coast Pilots N c. Radio Navigational Aids N d. All of the above 884: Which cloud type is normally associated with thunderstorms?
N a. Cirrus N b. Stratus N c. Cumulus Y d. Cumulonimbus 915: The Sun's center may be coincident with both the celestial equator and the observer's prime vertical circle when __________.
N a. it crosses the December solstitial point N b. it crosses the June solstitial point N c. it is in upper transit Y d. its declination is zero 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 961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?
Y a. Brazil N b. Tanzania N c. New Zealand N d. Norway 962: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. underlined letters N b. boldfaced print N c. italics Y d. capital letters 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 )
N a. 91521 Y b. 83322 N c. 81408 N d. 01615 974: Which cloud commonly produces a halo about the Sun or Moon?
Y a. Cirrostratus N b. Cirrocumulus N c. Altostratus N d. Altocumulus 981: The characteristic of a lighted cardinal mark may be __________.
Y a. very quick flashing N b. flashing N c. fixed N d. occulting 1119: The position labeled "D" was plotted because __________. (D051NG )
N a. the vessel's speed changed at 1125 N b. a dead reckoning position is plotted within 30 minutes of a running fix Y c. a dead reckoning position is plotted for each course change N 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?
N a. 090° Y b. 132° N c. 180° N d. 222° 1138: On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. You must pass __________.
N a. northward of the buoy N b. southward of the buoy N c. eastward of the buoy Y d. westward of the buoy 1202: As shown in the illustration, which wind speeds are reported at position A? (D049NG )
N a. 10 knots Y b. 15 knots N c. 20 knots N d. 25 knots 1262: A safe water daymark has what shape?
N a. Triangular N b. Diamond N c. Circular Y d. Octagonal 1263: The compass deviation changes as the vessel changes __________.
N a. geographical position N b. speed Y c. heading N d. longitude 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 1293: Deviation is caused by __________.
N a. changes in the earth's magnetic field N b. nearby magnetic land masses or mineral deposits Y c. magnetic influence inherent to that particular vessel N d. the magnetic lines of force not coinciding with the lines of longitude 1306: What type of clouds are associated with a cold front?
N a. Altostratus and fracto-cumulus N b. Altostratus and cirrus N c. Cirrus and cirrostratus Y d. Cumulus and cumulonimbus 1340: The annual change in variation for an area can be found in __________.
N a. the handbook for Magnetic Compass Adjustment, Pub 226 Y b. the center of the compass rose on a chart of the area N c. the compass deviation table N d. Variation does not change. 1424: Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________.
N a. always be nearer to the equator Y b. always be nearer to the elevated pole N c. be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere N d. be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions 1429: A celestial body will cross the prime vertical circle when the latitude is numerically __________.
Y a. greater than the declination and both are of the same name N b. less than the declination and both are of the same name N c. greater than the declination and both are of contrary name N d. less than the declination and both are of contrary name 1483: The most accurate method of determining gyrocompass error while underway is by __________.
Y a. comparing the gyro azimuth of a celestial body with the computed azimuth of the body N b. comparing the gyro heading with the magnetic compass heading N c. determining from the chart the course made good between celestial fixes N d. It cannot be determined accurately at sea due to drift of unknown currents. 1498: A true bearing of a charted object, when plotted on a chart, will establish a __________.
N a. fix Y b. line of position N c. relative bearing N d. range 1694: In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and outward N d. counterclockwise and inward 1726: How can you estimate the position of a tropical storm's center?
N a. With a radio weather bulletin or weather fax N b. using shipboard radar N c. observe the wind direction and apply Buys Ballot's law Y d. All of the above 1778: Illustration D037NG represents a movable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at A if the lock walls and piers are not awash? (D037NG )
Y a. One red light N b. Two red lights N c. Three red lights N d. One green light 1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y b. a weather fax N c. the Coast Pilot or Sailing Directions N d. the sky overhead 2111: Vessels regularly navigating Ohio and Mississippi rivers above Cairo, Illinois, and their tributaries, shall at all times have on board a copy of __________.
N a. Tide Tables N b. U.S. Coast Pilot Y c. U.S. Army Corps of Engineers Navigation Regulations (Blue Book) N d. Sailing Directions 2210: A dead reckoning (DR) plot __________.
Y a. ignores the effect of surface currents N b. is most useful when in sight of land N c. must be plotted using magnetic courses N d. may be started at an assumed position 2222: By convention, the south pole of a magnet is painted __________.
N a. red Y b. blue N c. white N d. black 2360: What U.S. agency is responsible for NAVAREA warnings?
N a. Coast Guard N b. National Oceanic and Atmospheric Administration N c. National Ocean Service Y d. National Geospatial-Intelligence Agency 2370: In the United States, short-range radio navigational warnings are broadcast by the __________.
Y a. Coast Guard N b. Corps of Engineers N c. NOAA N d. harbor master of the nearest port 2372: In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks illustrated in diagram D031NG would be fitted to this buoy? (D031NG )
N a. A N b. B Y c. C N d. D 2376: A large group of stars revolving around a center is known as a __________.
N a. cluster N b. shower N c. constellation Y d. galaxy 2416: An orange and white buoy indicating a vessel-exclusion area will be marked with what symbol?
N a. Open-faced diamond Y b. Diamond with a cross N c. Circle N d. Square 2459: The controlling depth of the river is __________.
N a. the minimum depth of the river prescribed in the channel maintenance program N b. the edge of a dredged channel N c. the highest level to which the river may rise without flooding Y d. the least available water in a channel which limits the draft of boats and tows 2678: A vessel crossing a river on the Western Rivers, must keep out of the way of a power-driven vessel __________.
N a. descending the river with a tow N b. ascending the river with a tow N c. ascending the river without a tow Y d. All of the above 2820: A towboat is pushing barges ahead at a dangerously fast speed when __________.
N a. the towboat vibrates when backing down N b. the roostertail exceeds the height of the main deck N c. a strain is placed on the face wires Y d. water comes over the foredeck of the lead barges 2932: If the main channel under a bridge is marked with lights of the lateral system the adjacent bridge piers should be marked with __________.
N a. occulting white lights Y b. fixed yellow lights N c. fixed white lights N d. flashing yellow lights 2938: You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
N a. 000° N b. 021° N c. 189° Y d. 272° 3084: An ECDIS is required to display which information?
Y a. Soundings N b. Waypoints N c. Meteorological data N d. Radar targets