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.
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 )
N a. Alter course to 053°T and pass the buoy close aboard on either side N b. Alter course to 060° and ensure that the bearings decrease Y c. Maintain course and ensure that the bearings increase N d. Alter course towards the buoy and leave the buoy well clear on either side 127: Mean low water is the average height of __________.
N a. the surface of the sea N b. high waters and low waters Y c. all low waters N d. the lower of the two daily low tides 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 __________.
N a. DR plot Y b. track line N c. heading N d. estimated course 265: It is 1200 local time for an observer at 54°E longitude. Which statement is TRUE?
N a. It is afternoon at Greenwich. N b. It is midnight at 126°E longitude. Y c. The observer is in time zone -4. N d. All of the above are true. 274: Which of the four adjustable errors in the sextant causes side error?
Y a. Horizon glass not being perpendicular to the frame N b. Index mirror not being perpendicular to the frame N c. Telescope not being parallel to the frame N d. Elliptical centering error 291: A buoy marking a wreck will show a(n) __________.
Y a. white light FL (2) and a topmark of 2 black spheres N b. occulting green light and may be lettered N c. yellow light and will be numbered N d. continuous quick white light and may be numbered 431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.
N a. the shape of an unlighted buoy N b. the light color of a lighted buoy N c. the color of the topmost band Y d. whether the number is odd or even 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) ?
N a. 0548 Y b. 0602 N c. 0618 N d. 0634 538: Which symbol shown represents a stationary front? (D018NG )
Y a. A N b. B N c. C N d. D 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?
N a. 3.190 inches Y b. 3.249 inches N c. 3.529 inches N d. 3.714 inches 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. 697: The set of the current is the __________.
N a. speed of the current at a particular time N b. maximum speed of the current N c. direction from which the current flows Y d. direction in which the current flows 817: Which current would you encounter on a direct passage from London, England, to Cape Town, South Africa?
N a. Falkland Current N b. Brazil Current N c. Norway Current Y d. Benguela Current 845: During one synodic rotation, a body makes one complete turn relative to the __________.
N a. Earth Y b. Sun N c. stars N d. vernal equinox 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?
N a. 1.5 miles Y b. 2.0 miles N c. 6.0 miles N d. 12.7 miles 893: One point of a compass is equal to how many degrees?
N a. 7.5 Y b. 11.25 N c. 17.5 N d. 22.5 969: The population of northern right whales, an endangered species, numbers approximately __________.
Y a. 300 N b. 5000 N c. 100,000 N d. 1,000,000 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 )
N a. A Y b. B N c. C N d. D 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 )
N a. A Y b. B N c. C N d. D 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?
N a. At the predicted time Y b. 30 minutes before the predicted time N c. One hour after the predicted time N d. 30 minutes before flood, one hour after an ebb 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 1141: What is characteristic of an isophase light?
N a. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse N b. 2 sec. flash, 5 sec. eclipse Y c. 1 sec. flash, 1 sec. eclipse N d. 6 sec. flash, 3 sec. eclipse 1213: If the magnetic heading is greater than the compass heading, the deviation is __________.
Y a. east N b. west N c. north N d. south 1243: Magnetic heading differs from compass heading by __________.
N a. compass error N b. true heading N c. variation Y d. deviation 1303: Compass deviation is caused by __________.
N a. magnetism from the earth's magnetic field N b. misalignment of the compass Y c. magnetism within the vessel N d. a dirty compass housing 1334: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "H" represents __________. (D042NG )
N a. ice N b. snow N c. rain Y d. hail 1519: You are preparing a weather report form, WS Form B-80. Your position is LAT 10°38'S, LONG 00°14'E. How would this be encoded? (D041NG )
N a. LAT 10.6°S, LONG 00.2°E N b. L106S, 30002 N c. 10385, 0014E Y d. 99106, 30002 1568: You are approaching a vertical lift bridge. You know the span is fully open when __________.
N a. three white lights in a vertical line are lit N b. a red light starts to flash at about 60 times a minute N c. a yellow light is illuminated on the bridge pier Y d. there is a range of green lights under the lift span 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 1614: Hot air can hold __________.
N a. less moisture than cold air Y b. more moisture than cold air N c. the same amount of moisture as cold air N d. moisture independent of air temperature 1626: Which instrument is used to measure the relative humidity of the air?
N a. A hydrometer Y b. A hygrometer N c. A spectrometer N d. A barograph 1677: The position labeled "E" was plotted because __________. (D051NG )
N a. a dead reckoning position is plotted within a half-hour of each course change Y b. a dead reckoning position is plotted for each speed change N c. the position is a running fix 1125 N d. the vessel's position was fixed at 1145 1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.
N a. NNW N b. WSW Y c. ESE N d. SSW 1743: In the Northern Hemisphere, if your vessel is in a hurricane's navigable semicircle it should be positioned with the wind on the __________.
Y a. starboard quarter, hold course and make as much speed as possible N b. port bow, hold course and make as much speed as possible until the hurricane has passed N c. port quarter, maintain course and make as much speed as possible N d. starboard bow and heave to until the hurricane has passed 1755: Which weather system produces strong cold winds called "Northers" during the winter months in the Gulf of Mexico?
N a. An anticyclone N b. A high pressure system N c. A cyclone Y d. Both A and B 1757: Where would you obtain data on currents for areas of the world not covered by the U.S. National Ocean Service?
N a. In the Coast Pilot N b. In the Nautical Almanac N c. In the List of Lights Y d. In the Sailing Directions 1801: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" Y b. an anticyclone N c. a low front or an occluded front N d. the "doldrums" 1869: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 1968: The Earth has the shape of a(n) __________.
N a. sphere Y b. oblate spheroid N c. spheroid of revolution N d. oblate eggoid 1988: The parallel of latitude at 23°27'N is the __________.
Y a. Tropic of Cancer N b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 1994: Fomalhaut is found in what constellation?
N a. Leo N b. Taurus Y c. Pisces N d. Canis Major 2060: What is the relative bearing of an object broad on the starboard quarter?
N a. 045° N b. 090° Y c. 135° N d. 225° 2115: 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. Light List Vol. V N c. U.S. Coast Pilot N d. None of the above 2147: What lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over blue Y b. Red over amber (yellow) N c. Red over green N d. None of the above 2236: Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?
N a. She has the right of way. N b. She shall propose the manner of passage. N c. She shall initiate the maneuvering signals. Y d. All of the above 2270: The lubber's line of a magnetic compass __________.
N a. always shows true north direction Y b. indicates the vessel's heading N c. is always parallel to the vessel's transom N d. is located on the compass card 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. 2342: What happens because of augmentation?
Y a. The Moon appears larger as the elevation increases. N b. The Sun appears larger when viewed against the darker background of the horizon. N c. The horizon appears elevated when observing a bright Sun or Moon at low altitudes. N d. The Moon appears larger at the full Moon. 2529: A bridge over a navigable waterway is being repaired. There is a traveler platform under the bridge's deck that significantly reduces the vertical clearance. If required by the CG district commander, how will this be indicated at night?
N a. Illumination by flood lights Y b. A quick flashing red light at each lower corner N c. A strobe light visible both up and downstream N d. Fixed amber lights under the extreme outer edges of the traveler 2646: During daylight savings time the meridian used for determining the time is located farther __________.
Y a. east N b. west N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
N a. crossing the river N b. descending the river Y c. ascending the river N d. proceeding towards sea 2690: Right ascension is primarily used by the navigator for __________.
N a. calculating amplitudes N b. calculating great circle sailings by the Ageton method N c. entering the Air Navigation Tables (Selected Stars) Pub 249 Y d. plotting on star finders 2729: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ships fog horn 5.5 seconds after the signal was sounded. What is the distance to the shore?
N a. 3825 ft (1166 meters) N b. 3450 ft (1052 meters) Y c. 3072 ft (936 meters) N d. 2475 ft (754 meters) 2752: A daymark used to indicate the safe water in a channel will have which of the shapes shown? (D045NG )
N a. A N b. B Y c. C N d. D 2821: The height of tide is the __________.
N a. difference between the depth of the water at high tide and the depth of the water at low tide N b. depth of water at a specific time due to tidal effect Y c. difference between the depth of the water and the area's tidal datum N d. difference between the depth of the water and the high water tidal level 2959: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. time of the next navigational satellite N b. distance to the next port Y c. speed of the vessel over the ground or through the water N d. None of the above 3002: The diurnal variation of pressure is most noticeable __________.
N a. above the polar circles N b. in a low pressure area N c. during periods of low temperatures Y d. in the doldrums 3026: A compass card without north-seeking capability that is used for relative bearings is a(n) __________.
N a. bearing circle Y b. pelorus N c. bearing bar N d. alidade 3068: Which of the following data layer categories is NOT displayed on ECDIS?
N a. Notice to Mariners information N b. ECDIS warnings and messages Y c. Ship hydrodynamic information N d. Hydrographic Office data 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