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 28: When using a buoy as an aid to navigation which of the following should be considered?
N a. The buoy should be considered to always be in the charted location. N b. If the light is flashing, the buoy should be considered to be in the charted location. Y c. The buoy may not be in the charted position. N d. The buoy should be considered to be in the charted position if it has been freshly painted. 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 __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 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 264: Which of the four adjustable errors in the sextant is the principle cause of index error?
N a. Telescope not being parallel to the frame Y b. Index mirror and horizon glass not being parallel N c. Index mirror not being perpendicular to the frame N d. Horizon glass not being perpendicular to the frame 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?
N a. Cn 240°, 28.0 knots N b. Cn 270°, 28.0 knots N c. Cn 180°, 30.0 knots Y d. Cn 090°, 32.5 knots 293: The use of pulse groups and extremely precise timing at each Loran-C station makes possible the use of __________.
N a. high frequency pulses N b. combinations of high and low frequency pulses Y c. the same frequency for all stations in a chain N d. varied long and short pulses 348: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
N a. center bearings N b. tangent bearings N c. objects that are close aboard Y d. ranges 429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
N a. 127°E Y b. 53°E N c. 27°E N d. 27°W 432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.
N a. the meridian through the object of the bearing Y b. the meridian through the ship's position N c. the meridian midway between the ship and the object N d. any meridian 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 474: Which indication on the barometer is most meaningful in forecasting weather?
N a. The words "Fair -- Change -- Rain" Y b. The direction and rate of change of barometric pressure N c. The actual barometric pressure N d. The relative humidity 518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.
Y a. selective availability is set to zero N b. the satellites are all below 15° in elevation N c. your vessel is equipped with a Doppler receiver N d. the horizontal dilution of precision is high 641: Buoys which mark isolated dangers are painted with alternating _____________ .
Y a. red and black bands N b. green and black bands N c. red and white stripes N d. green and white bands 667: The navigable semicircle of a typhoon in the Southern Hemisphere is the area __________.
N a. behind the typhoon, measured from 90° to 180°From each side of the storm's track Y b. to the right of the storm's track N c. ahead of the typhoon, measured from the storm's track to 90° on each side N d. measured from due south, counterclockwise 180° 695: An azimuth angle for a body is measured from the __________.
Y a. observer's meridian N b. Greenwich meridian N c. body's meridian N d. zenith distance 730: In the Northern Hemisphere, the largest waves or swells created by a typhoon or hurricane will be located __________.
N a. in the southeast quadrant of the storm N b. directly behind the storm center Y c. forward and to the right of its course N d. behind and to the left of its course 809: The compass rose on a nautical chart indicates both variation and __________.
N a. deviation Y b. annual rate of variation change N c. precession N d. compass error 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 830: The highest frequency of tropical cyclones in the North Atlantic Ocean occurs during __________.
N a. January, February and March N b. April, May and June Y c. August, September and October N d. July, November and December 946: The wind circulation around a high pressure center in the Northern Hemisphere is __________.
N a. counterclockwise and moving towards the high N b. counterclockwise and moving outward from the high N c. clockwise and moving towards the high Y d. clockwise and moving outward from the high 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?
N a. 18.0 nm N b. 14.8 nm Y c. 11.7 nm N d. 6.0 nm 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 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) __________.
N a. cold front N b. occluded front Y c. stationary front N d. warm front 1156: When cold air displaces warm air you have a(n) __________.
Y a. cold front N b. occluded front N c. stationary front N d. warm front 1166: A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.
N a. upper front aloft N b. cyclone N c. occluded front Y d. cold front 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?
Y a. 0.2 knot N b. 0.4 knot N c. 0.7 knot N d. 0.9 knot 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 1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?
N a. 2.1 feet N b. 1.7 feet N c. 1.2 feet Y d. 0.6 foot 1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?
N a. -.3 foot (-0.1 meter) Y b. -.6 foot (-0.2 meter) N c. 1.3 feet (0.4 meter) N d. 1.6 feet (0.5 meter) 1276: Which weather change accompanies the passage of a cold front in the Northern Hemisphere?
N a. Wind shift from northeast, clockwise to southwest N b. Steady dropping of barometric pressure N c. Steady precipitation, gradually increasing in intensity Y d. A line of cumulonimbus clouds 1377: What is the velocity of the tidal current at the east end of Pollock Rip Channel at 1700 DST (ZD +4) on 23 July 1983?
N a. 0.6 knot ebbing N b. 0.8 knot flooding Y c. 1.5 knots flooding N d. 1.9 knots flooding 1454: Atmospheric pressure may be measured with a(n) __________.
N a. barograph N b. aneroid barometer N c. mercurial barometer Y d. All of the above 1464: A line of position derived from a loran reading is a section of a(n) __________.
N a. straight line N b. arc N c. parabola Y d. hyperbola 1550: Cirrus clouds are indicated by which number? (D039NG )
Y a. 1 N b. 4 N c. 5 N d. 7 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1684: Which type of frontal passage is associated with a relatively narrow band of precipitation?
Y a. A cold front N b. A warm front N c. A stationary front N d. None of the above 1686: Which of the following statements concerning frontal movements is TRUE?
N a. The temperature rises after a cold front passes. N b. The barometric pressure rises when a warm front passes. Y c. A cold front generally passes faster than a warm front. N d. A warm front usually has more violent weather associated with it than a cold front. 1718: A hurricane is characterized by winds of __________.
N a. up to 33 knots N b. 34 to 47 knots N c. 48 to 63 knots Y d. 64 knots or greater 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 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" 1841: The letter A as shown represents the __________. (D006NG )
Y a. sensible horizon N b. geoidal horizon N c. visible horizon N d. celestial horizon 1883: Pressure gradient is a measure of __________.
N a. a high-pressure area Y b. pressure difference over horizontal distance N c. pressure difference over time N d. vertical pressure variation 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 2073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. a radio transmitter N b. a government facility or station N c. inconspicuous Y d. conspicuous 2152: Permanent magnetism is found in __________.
Y a. hard iron N b. soft iron N c. vertical iron only N d. horizontal iron only 2209: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. You should now adjust the compass until it reads __________.
Y a. 268° N b. 270° N c. 274° N d. Do not adjust the compass, just record the error. 2224: By convention, the north seeking ends of a compass' magnets are colored __________.
N a. black N b. blue Y c. red N d. white 2300: When a magnetic compass is not in use for a prolonged period of time it should __________.
Y a. be shielded from direct sunlight N b. be locked into a constant heading N c. have any air bubbles replaced with nitrogen N d. have the compensating magnets removed 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2335: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high. If the visibility is 17 miles and your height of eye is 25 feet, at what approximate distance will you sight the light?
N a. 10.0 miles Y b. 12.9 miles N c. 14.2 miles N d. 17.0 miles 2373: The vertical distance from the tidal datum to the level of the water is the __________.
N a. actual water depth N b. range of tide N c. charted depth Y d. height of tide 2418: While proceeding downriver, you sight a red triangular-shaped daymark on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.
N a. special purpose signal Y b. passing daymark N c. mark with no lateral significance N d. crossing daymark 2446: What is the equivalent of 47 min. 20 sec. in arc units?
N a. 8°27' Y b. 11°50' N c. 13°42' N d. 13°56' 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2660: In the celestial equator system of coordinates what is equivalent to the longitude of the Earth system of coordinates?
N a. Zenith distance N b. Azimuth angle N c. Declination Y d. Greenwich hour angle 3012: The draw span of a floating drawbridge may be marked with __________.
Y a. a yellow light showing Morse Code (B) N b. a yellow and white diamond N c. flashing blue lights N d. three red lights on each side of the draw 3126: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS will not provide information on another vessel if that vessel is indistinguishable in radar sea clutter. N b. AIS can be relied upon as the sole means to determine risk of collision and safe speed. N c. AIS is designed to replace ARPA, maneuvering boards, and visual bearings as a means to ascertain the risk of collision. Y d. AIS provides the other vessel's identity, dimensions and navigational status regardless of visibility.