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.
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 130: The distance between the surface of the water and the tidal datum is the __________.
N a. range of tide Y b. height of tide N c. charted depth N d. actual water depth 176: Which wind pattern has the most influence over the movement of frontal weather systems over the North American continent?
N a. Subpolar easterlies N b. Northeast trades Y c. Prevailing westerlies N d. Dominant southwesterly flow 209: The West Wind Drift is located __________.
Y a. near 60°S N b. on each side of the Equatorial Current N c. in the North Atlantic between Greenland and Europe N d. in the South Pacific near 5°S 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 305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
Y a. red can buoy N b. black can buoy N c. red conical buoy N d. black conical buoy 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?
N a. East to northeast N b. East to southeast Y c. North to northwest N d. South to southeast 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 452: When navigating in high latitudes and using a chart based on a Lambert conformal projection, __________.
Y a. a straight line drawn on the chart approximates a great circle N b. the chart should not be used outside of the standard parallels N c. the course angle is measured at the mid-longitude of the track line N d. distance cannot be measured directly from the chart 485: A phase correction is applied to observations of __________.
N a. the Sun N b. stars Y c. planets N d. All of the above 555: The letter D shown represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 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)?
N a. 4°10.2' N b. 4°14.3' Y c. 4°17.0' N d. 4°24.1' 682: Which table is NOT found in the U.S. Coast Pilots?
N a. Climatological table Y b. Luminous range table N c. Meteorological table N d. Coastwise distance table 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 705: The precession of the equinoxes occurs in a(n) __________.
N a. easterly direction Y b. westerly direction N c. northerly direction N d. southerly direction 780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.
N a. barometer N b. wind vane Y c. anemometer N d. thermometer 805: If the right ascension of a body is 9 hours, it also __________.
Y a. is 135° N b. corresponds to an SHA for the body of 45° N c. means that the GP of the body is in the western hemisphere N d. All of the above 816: Cyclones that have warm sectors usually move __________.
N a. westerly Y b. parallel to the isobars in the warm sector N c. toward the nearest high pressure area N d. faster than the accompanying cold front 873: Compass error is equal to the __________.
N a. deviation minus variation N b. variation plus compass course Y c. combined variation and deviation N d. difference between true and magnetic heading 874: Altocumulus clouds are defined as __________.
N a. high clouds Y b. middle clouds N c. low clouds N d. vertical development clouds 937: The north equatorial current flows to the __________.
N a. east N b. northeast N c. southwest Y d. west 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 __________.
N a. windward side N b. leeward side N c. safe semicircle Y d. dangerous semicircle 973: The heading of a vessel is indicated by what part of the compass?
N a. Card N b. Needle Y c. Lubber's line N d. Gimbals 984: The bases of middle clouds are located at altitudes of between __________.
N a. 3,000 to 6,500 feet (914 to 1981 meters) Y b. 6,500 to 20,000 feet (1981 to 6096 meters) N c. 10,000 to 35,000 feet (3048 to 10,668 meters) N d. 20,000 to 60,000 feet (6096 to 18,288 meters) 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 __________.
N a. outside of the triangle N b. anywhere in the triangle N c. on the line of position from the nearest object, between the other two lines of position Y d. in the geometric center of the triangle 1040: An occluded front is usually caused by a __________.
N a. cold front becoming stationary N b. warm front becoming stationary Y c. cold front overtaking a warm front N d. warm front dissipating 1048: The velocity of the current in large coastal harbors is __________.
N a. unpredictable N b. generally too weak to be of concern Y c. predicted in Tidal Current Tables N d. generally constant 1071: A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the __________.
Y a. north side of the mark N b. west side of the mark N c. east side of the mark N d. south side of the mark 1144: Freezing salt water spray should be anticipated when the air temperature drops below what temperature?
N a. 32°F (0.0°C) Y b. 28°F (-2.2°C) N c. 0°F (-17.8°C) N d. -40°F (-28.9°C) 1240: Weather information is available from __________.
N a. commercial radio broadcasts N b. the Coast Guard on scheduled marine information broadcasts N c. VHF-FM continuous marine weather broadcasts provided by the National Weather Service Y d. All of the above 1482: Which statement concerning current is TRUE?
N a. Current can be determined by measuring the direction and distance between simultaneous EP and DR positions. Y b. The drift of the current should be averaged out on a one hour basis. N c. After the current is determined, it should not be used for further plotting because it is an unknown variable. N d. The distance between a simultaneous DR position and fix is equal to the drift of the current. 1534: You are preparing a weather report form, WS Form B-80. Your position is LAT 22°31'S, LONG 138°19'W. How would this be encoded? (D041NG )
N a. LAT 22.5°S, LONG 138.3°W Y b. 99225, 51383 N c. L2231, 53819 N d. 2231S, 5383W 1538: The winds of the "roaring forties" are strongest near __________.
N a. 40°N N b. 50°N N c. 40°S Y d. 50°S 1582: Sextant C in illustration D043NG reads __________. (D043NG )
N a. 30°45.9' N b. 29°56.0' N c. 29°52.0' Y d. 29°47.5' 1584: A decrease in barometric pressure is associated with all of the following except __________.
N a. rising warm air N b. proximity to a low pressure area N c. inward spiraling circulation Y d. clear dry weather 1589: 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 __________.
N a. smoother seas and warmer water Y b. steeper waves, closer together N c. long swells N d. cirrus clouds 1597: The dense black cumulonimbus clouds surrounding the eye of a hurricane are called __________.
N a. spiral rainbands Y b. cloud walls N c. funnel clouds N d. cyclonic spirals 1624: A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.
N a. atmospheric pressure N b. wind speed Y c. relative humidity and dew point N d. wind chill factor 1641: The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.
N a. cirrus cloud N b. cumulus cloud N c. cumulonimbus cloud Y d. nimbostratus cloud 1644: Which scale is used to estimate wind speed by observing sea conditions __________.
N a. Metric scale N b. Wind scale N c. Coriolis scale Y d. Beaufort scale 1682: Which of the listed properties does warm air possess?
N a. It rises above cooler air and cools as it rises. N b. Atmospheric pressure drops as warm air rises. N c. Moisture in warm air condenses as the air is cooled. Y d. All of the above 1868: Illustration D036NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter A in the illustration? (D036NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 1969: The precession of the equinoxes of the Earth is __________.
N a. the gradual increase in the period of rotation caused by the effects of the Moon N b. the irregularity of the Earth's orbit caused by influences of the Sun and Moon N c. caused by the elliptical shape of the Earth's orbit Y d. similar to a top spinning with its axis tilted 2056: This illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter C? (D038NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No lights 2114: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
N a. Sailing Directions N b. Nautical Almanac for the year N c. U.S. Coast Pilot Y d. U.S. Army Corps of Engineers Regulations (Blue Book) 2175: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, which light(s) will be shown at D if the lock walls and piers are not awash?
N a. One amber light Y b. One red light N c. Two red lights N d. Three red lights 2189: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends are to port and the athwartships tray is at the bottom, you should add some more magnets. N b. If the blue ends are to port and the athwartships tray is at the top, you should add some more magnets. N c. If the red ends are to port, you should lower the athwartships tray. Y d. If the red ends are to port and the tray is at the bottom, you should raise the tray. 2306: In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown would be fitted to the buoy? (D031NG )
Y a. A N b. B N c. C N d. D 2351: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. running fix N b. probable position N c. fix Y d. dead-reckoning position 2379: The winter solstice is the point where the Sun is at __________.
N a. maximum declination north Y b. maximum declination south N c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2474: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. Y b. If the blue ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should reverse the magnets. N d. If the blue ends of the magnets are to starboard, you should raise the athwartships tray. 2505: At the approaches to Savannah, GA, with the wind coming out of the west, the wind-driven current will be flowing approximately __________.
N a. 280° N b. 260° N c. 100° Y d. 080° 2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.
N a. north side of the mark N b. west side of the mark N c. east side of the mark Y d. south side of the mark 2656: What is the equivalent of 0 min. 16 sec. in arc units?
N a. 0°32' N b. 0°16' Y c. 0°04' N d. 0°01' 2689: The letter D in illustration D006NG represents __________. (D006NG )
Y a. geometrical horizon N b. visible horizon N c. celestial horizon N d. sensible horizon 2696: You must draw a plotting sheet covering latitudes 52°S to 56°S and longitudes 179°W to 175°E. If the distance between latitude 52°S to 56°S is 24 inches, what is the distance between the meridians of 1° of longitude?
N a. 3.2 inches Y b. 3.5 inches N c. 4.0 inches N d. 4.2 inches 2704: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the starboard side of a vessel __________.
N a. proceeding from seaward N b. crossing the river N c. ascending the river Y d. descending the river 2750: When pushing a tow and approaching barges tied off to the shore, you should __________.
N a. increase speed so you will pass faster Y b. decrease speed while passing so you won't create a suction N c. do nothing different as the barges should be tied off properly N d. move to the opposite side of the channel from the barges and increase speed 3017: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.
N a. 3 hours N b. 6 1/4 hours Y c. 12 1/2 hours N d. 18 3/4 hours 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