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.
10: The wind at Frying Pan shoals has been northwesterly at an average velocity of 22 knots. The predicted set and drift of the rotary current are 125° at 0.6 knot. What current should you expect?
Y a. 119° at 0.9 knot N b. 172° at 1.1 knots N c. 225° at 0.6 knot N d. 340° at 0.4 knot 45: The navigator aboard a ship at approximately 165°E longitude observes the Sun at ZT 14-25-04 on 21 September. What is the GMT and Greenwich date of the observation?
Y a. 03-25-04, 21 September N b. 02-25-04, 21 September N c. 01-25-04, 21 September N d. 01-25-04, 20 September 67: What is the definition of height of tide?
Y a. The vertical distance from the tidal datum to the level of the water at any time N b. The vertical difference between the heights of low and high water N c. The vertical difference between a datum plane and the ocean bottom N d. The vertical distance from the surface of the water to the ocean floor 85: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 123: If the radio signal ground wave extends out for less distance than the minimum skywave distance, there is an area in which no signal is received. This is called the __________.
Y a. skip zone N b. blackout zone N c. diffraction zone N d. shadow zone 132: The value of sixty nautical miles per degree of geodetic latitude is most correct at __________.
N a. the equator Y b. latitude 45° N c. the poles N d. all latitudes 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 519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?
N a. Surging Y b. Spilling N c. Plunging N d. Converging 525: In the celestial equator system of coordinates, what is comparable to latitude on the terrestrial sphere?
N a. Altitude N b. Right ascension N c. Celestial meridians Y d. Declination 553: The beam width of your radar is 2°. The left tangent bearing of a small island, as observed on the PPI scope, is 056°pgc. If the gyro error is 2°E, what bearing would you plot on the chart?
N a. 052° N b. 056° Y c. 059° N d. 060° 566: You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most likely __________.
N a. in the right semicircle N b. in the left semicircle N c. on the storm track ahead of the center Y d. on the storm track behind the center 585: What great circle is always needed to form the astronomical triangle?
N a. Celestial Equator N b. Prime Meridian Y c. Celestial Meridian N d. Prime Vertical Circle 607: The charted depth alongside the south face of Mystic Pier, Charlestown, MA, is 35 feet. Your maximum draft is 38 feet. You wish to have 2 feet under the bottom, on a rising tide, when you go alongside to discharge a heavy lift. What is the earliest time after 0900 EST (ZD +5), on 2 February 1983, that you can dock?
N a. 1020 N b. 1050 N c. 1127 Y d. 1137 610: The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true wind __________.
N a. must be from dead ahead N b. speed must be zero Y c. must be from dead astern N d. must be on the beam 613: Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.
N a. a submerged submarine Y b. ducting N c. sub-refraction N d. ionospheric skip waves 665: 17 degrees of latitude is equal to __________.
N a. 68 miles N b. 510 miles Y c. 1020 miles N d. 4080 miles 716: Standard atmospheric pressure in inches of mercury is __________.
N a. 30.00 N b. 28.92 Y c. 29.92 N d. 29.00 778: The navigable semicircle of a hurricane in the Northern Hemisphere is that area of the storm measured __________.
N a. from true north clockwise to 180°T N b. from true north counterclockwise to 180°T N c. from the bow counterclockwise to 180° relative Y d. from the direction of the storm's movement counterclockwise 180° 870: Vessels should maintain a sharp lookout, especially during December through March, when navigating the right whale's only known calving grounds which lie off the coasts of __________.
N a. Nova Scotia N b. Maine and Massachusetts Y c. Georgia and NE Florida N d. California and Mexico 907: In which month will the equatorial counter current be strongest?
N a. January N b. April Y c. August N d. October 976: The atmosphere in the vicinity of a high pressure area is called a(n) __________.
Y a. anticyclone N b. cold front N c. occluded front N d. cyclone 1009: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 34°F, and the wet bulb thermometer reads 31°F. Using the ships code card, how would you encode the air temperature groups in the report? (D041NG )
N a. 10340, 2127/ N b. 10111, 2104/ Y c. 10011, 2104/ N d. 10340, 2031/ 1168: Which type of cloud is indicated by the number 4? (D039NG )
N a. Altocumulus N b. Cirrostratus N c. Cumulus Y d. Altostratus 1219: Which sextant in illustration D043NG reads 29°42.5'? (D043NG )
N a. A N b. B N c. C Y d. D 1232: Entering from seaward, triangular-shaped daymarks are used to mark __________.
Y a. the starboard side of the channel N b. the centerline of the channel N c. an obstruction where the preferred channel is to starboard N d. special purpose areas 1234: Which information does the outer ring of a compass rose on a nautical chart provide?
N a. Variation Y b. True directions N c. Magnetic directions N d. Annual rate of variation change 1280: A current perpendicular to a vessel's track has the greatest effect on the vessel's course made good __________.
N a. at high vessel speeds Y b. at low vessel speeds N c. in shallow water N d. in deep water 1335: Plain language is usually used on marine weather __________.
Y a. forecasts N b. observations N c. analyses N d. reports 1397: What will be the velocity of the tidal current at Port Jefferson Harbor Entrance, NY, at 1600 EST (ZD +5) on 23 December 1983?
N a. 0.9 knot Y b. 1.1 knots N c. 1.6 knots N d. 2.0 knots 1426: Fog is most commonly associated with a(n) __________.
Y a. warm front at night N b. low pressure area N c. anticyclone N d. cold front in the spring 1430: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet high (12.8 meters). If the visibility is 6 miles and your height of eye is 20 feet (6.1 meters), at what approximate distance will you sight the light?
N a. 20.1 miles Y b. 10.0 miles N c. 7.6 miles N d. 6.0 miles 1440: A mercurial barometer at sea is subject to rapid variations in height ("pumping") due to the pitch and roll of the vessel. To avoid this error, measurements of atmospheric pressure at sea are usually measured with a(n) __________.
N a. syphon barometer N b. cistern barometer Y c. aneroid barometer N d. fortin barometer 1449: The presence of stratus clouds and a dying wind will usually result in __________.
N a. heavy rain N b. heavy snow Y c. thick fog N d. clearing skies 1449: The presence of stratus clouds and a dying wind will usually result in __________.
N a. heavy rain N b. heavy snow Y c. thick fog N d. clearing skies 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 1512: You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?
N a. The arc should be converted into a straight line using offsets and then run forward. N b. An arc should never be run forward. Y c. The position of the object observed should be advanced to the new time and a new arc swung using the radius of the old arc. N d. The distance between LOP's should be added to the radar range and a new arc swung. 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 1527: Your vessel is on course 270°T, speed 10 knots. The apparent wind is from 10° off the port bow, speed 30 knots. From which direction is the true wind?
N a. 345°T Y b. 255°T N c. 165°T N d. 075°T 1585: The sidereal day begins when the __________.
Y a. first point of Aries is over the upper branch of the reference meridian N b. Sun is over the lower branch of the reference meridian N c. Sun is over the upper branch of the reference meridian N d. first point of Aries is over the lower branch of the reference meridian 1610: When the navigational channel passes under a fixed bridge, the edges of the channel are marked on the bridge with what lights?
Y a. Red lights N b. Three white lights in a vertical line N c. Red lights on the LDB and green lights on the RDB N d. Yellow lights 1616: Which picture in illustration D034NG shows a Morse (A) light? (D034NG )
N a. A N b. B N c. C Y d. D 1649: If you count 20 seconds between seeing lightning and hearing the thunder, how far is the storm away from you?
N a. 2 miles Y b. 4 miles N c. 6 miles N d. 8 miles 1663: What is the primary source of the earth's weather?
N a. The oceans N b. The moon Y c. The sun N d. The solar system 1720: In the Southern Hemisphere winds in a low pressure system rotate in a __________.
Y a. clockwise direction N b. northeasterly direction N c. northerly direction N d. counterclockwise direction 1772: The GP of a body for a high altitude sight is determined from the declination and the __________.
Y a. Greenwich hour angle N b. azimuth N c. zenith distance N d. right ascension 1907: Information about direction and velocity of rotary tidal currents is found in the __________.
N a. Tide Tables N b. Nautical Almanac Y c. Tidal Current Tables N d. Mariner's Guide 2129: 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, what light(s) will be shown at B if the lock walls and piers are not awash?
N a. No lights Y b. Three red lights N c. Two red lights N d. One red light 2158: Permanent magnetism is caused by __________.
N a. operation of electrical equipment and generators on board ship Y b. the earth's magnetic field affecting the ship's hard iron during construction N c. the horizontal component of the earth's magnetic field acting on the horizontal soft iron N d. the vertical component of the earth's magnetic field acting on the vertical soft iron 2174: By convention, the Earth's north magnetic pole is colored __________.
N a. red N b. white Y c. blue N d. black 2380: The navigation regulations applicable to a U.S. inland waterway can be found in the __________.
N a. Notices to Mariners N b. Channel Reports N c. Sailing Directions Y d. Coast Pilots 2424: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to starboard may display which of the topmarks shown? (D046NG )
Y a. A N b. B N c. C N d. D 2536: A revised print of a chart is made __________.
N a. after every major hydrographic survey of the area covered by the chart N b. when there are numerous corrections to be made or the corrections are extensive Y c. when a low-stock situation occurs and minor corrections are made N d. every two years to update the magnetic variation information 2606: The measurement of local time is based on the passage of the Sun over the __________.
N a. upper branch of the observer's meridian Y b. lower branch of the observer's meridian N c. upper branch of the Greenwich meridian N d. lower branch of the Greenwich meridian 2644: The sidereal day begins __________.
N a. when the sun is over the first point of Aries N b. when the first point of Aries is over 180° longitude Y c. when the first point of Aries is over the upper branch of the reference meridian N d. at 0000 on 1 January (Sidereal Date) 2718: A power-driven vessel operating in a narrow channel with a following current, on the Western Rivers, is meeting an upbound vessel. Which statement is TRUE?
N a. The downbound vessel has the right-of-way. N b. The downbound vessel must initiate the required maneuvering signals. N c. The downbound vessel must propose the manner and place of passage. Y d. All of the above 2776: For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?
N a. Personal correction Y b. Instrument correction N c. Phase N d. Dip correction 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° 2966: You take a bearing of 264° of a lighthouse. Which bearing of another object would give the best fix?
N a. 291° N b. 059° Y c. 182° N d. 239° 3052: The Sailing Directions contain information on __________.
N a. required navigation lights N b. lifesaving equipment standards N c. casualty reporting procedures Y d. currents in various locations 3090: NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of __________.
N a. 156.8, 157.1, 162.55 MHz N b. 162.55, 162.00, 171.5 KHz Y c. 162.55, 162.40, 162.475 MHz N d. 2182, 2638, 2670 KHz