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.
20: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
Y a. 77 miles N b. 82 miles N c. 87 miles N d. 93 miles 40: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1600 and turn for 8 knots, at what point will you lose the ebb current?
N a. Billingsport N b. Marcus Hook Y c. Mile 63 N d. Mile 52 70: The station located at "A" is the __________. (D001NG )
N a. on station N b. off station Y c. master station N d. secondary station 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 133: The line connecting the Loran-C master station with a secondary station is called the __________.
N a. focus line Y b. base line N c. side line N d. center line 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 171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
Y a. safe water N b. a fish trap area N c. a hazard to navigation N d. a bifurcation in the channel 191: Safe water buoys may show ONLY __________.
N a. flashing red lights N b. flashing green lights Y c. white lights N d. yellow lights 236: The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.
N a. doldrums N b. horse latitudes Y c. trade winds N d. prevailing westerlies 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.
Y a. northeast N b. west-southwest N c. northwest N d. south-southeast 411: When entering from seaward, a buoy displaying a single-flashing red light would indicate __________.
N a. a junction with the preferred channel to the left N b. a sharp turn in the channel to the right Y c. the starboard side of the channel N d. a wreck to be left on the vessel's port side 422: If you are sailing from the East Coast of the United States to the Caribbean Sea, which publication would contain information on weather, currents, and storms?
N a. Sailing Charts of the Caribbean Sea Y b. Pilot Charts of the North Atlantic N c. Light Lists, Atlantic and Gulf Coast N d. Tidal Current Tables 436: A wind vane on a moving vessel shows __________.
N a. dead reckoning wind direction N b. true wind direction Y c. apparent wind direction N d. estimated wind direction 447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?
Y a. 5.3 feet (1.6 m) N b. 5.6 feet (1.7 m) N c. 6.2 feet (1.9 m) N d. 6.8 feet (2.7 m) 509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.
N a. straight line Y b. arc N c. parabola N d. line parallel to the coast 535: The tropical year differs from which year by 20 minutes?
N a. Astronomical year N b. Natural year N c. Equinoctial year Y d. Sidereal year 604: Chronometer error may be found by __________.
N a. radio time signal N b. comparison with a timepiece of known error N c. applying the prevailing chronometer rate to previous readings Y d. All of the above 718: You are to sail from Elizabethport, NJ, on 22 May 1983 with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 27 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD +4) you can sail on the afternoon of 22 May and pass over the obstruction with 3 feet of clearance?
Y a. 1407 N b. 1331 N c. 1303 N d. 1242 749: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 249° Y b. 256° N c. 262° N d. 268° 761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.
N a. be spherical N b. display a white light N c. be lettered Y d. show a quick flashing light 799: In Region A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
N a. green can buoy N b. red can buoy Y c. green conical buoy N d. red conical buoy 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 28 935: The Light List shows that a navigational light has a nominal range of 5 miles and a height above water of 21 feet (6.4 meters). Your height of eye is 32 feet (9.8 meters) and the visibility is 1.0 mile. At what approximate range will you first sight the light?
N a. 1.0 mile Y b. 1.5 miles N c. 5.0 miles N d. 11.7 miles 952: What is TRUE concerning new editions of Light Lists?
N a. Supplements to new editions are issued monthly by the U.S. Coast Guard. N b. New editions are published by the National Ocean Service. Y c. New editions are corrected through the date shown on the title page. N d. None of the above 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 981: The characteristic of a lighted cardinal mark may be __________.
Y a. very quick flashing N b. flashing N c. fixed N d. occulting 1044: The dry-bulb temperature is 78°F and the wet-bulb temperature is 62°F. What is the relative humidity?
N a. 16% N b. 24% Y c. 39% N d. 79% 1060: Isobars on a weather map are useful in predicting __________.
N a. temperature N b. dew point Y c. wind velocity N d. relative humidity 1072: What is the approximate geographic range of Assateague Light, VA, if your height of eye is 52 feet (15.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 14.1 nm N b. 21.8 nm Y c. 23.0 nm N d. 50.2 nm 1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30°N and 60°N is commonly called the __________.
Y a. prevailing westerlies N b. horse latitudes N c. trade winds N d. subpolar low pressure belts 1318: You are to sail from Elizabethport, N.J., on 17 November 1983 with a maximum draft of 27 feet. You will pass over an obstruction in the channel near Sandy Hook that has a charted depth of 25.5 feet. The steaming time from Elizabethport to the obstruction is 1h 50m. What is the earliest time (ZD +5) you can sail on 17 November and pass over the obstruction with 2 feet of clearance?
N a. 0059 Y b. 0121 N c. 0159 N d. 0221 1324: When daylight savings time is kept, the time of tide and current calculations must be adjusted. One way of doing this is to __________.
Y a. add one hour to the times listed under the reference stations N b. subtract one hour from the time differences listed for the subordinate stations N c. apply no correction as the times in the reference stations are adjusted for daylight savings time N d. add 15° to the standard meridian when calculating the time difference 1425: Which is an inferior planet?
N a. Mars Y b. Venus N c. Neptune N d. Pluto 1443: At the master gyrocompass, the compass card is attached to the __________.
N a. spider element Y b. sensitive element N c. link arm N d. pickup transformer 1492: You are planning a voyage from San Francisco to Japan. Which publication contains information on the ocean routes?
N a. Coast Pilot Y b. Sailing Directions (Planning Guide) N c. Sailing Directions (Enroute) N d. World Port Index 1507: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
N a. come right N b. come left N c. wait until the lights are no longer in a vertical line Y d. continue on the present course 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 1567: Buoys and day beacons exhibiting a yellow triangle or square painted on them are used __________.
N a. in minor harbors where the controlling depth is 10 feet (3 meters) or less N b. on isolated stretches of the ICW to mark undredged areas Y c. where the ICW and other waterways coincide N d. at particularly hazardous turns of the channel 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1758: The climate of the eastern Gulf coast __________.
N a. is humid and subtropical throughout the year N b. has an east coast marine type of climate N c. has a Mediterranean type of climate Y d. varies from warm to subtropical 1992: The parallel of latitude at 23°27'S is the __________.
N a. Tropic of Cancer Y b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 2050: The point where the vertical rise or fall of tide has stopped is referred to as __________.
N a. slack water N b. the rip tide Y c. the stand of the tide N d. the reverse of the tide 2080: You are on course 030°T. The relative bearing of a lighthouse is 45°. What is the true bearing?
N a. 015° Y b. 075° N c. 255° N d. 345° 2091: The velocity of the current in large coastal harbors is __________.
N a. unpredictable N b. generally constant N c. generally too weak to be of concern Y d. predicted in Tidal Current Tables 2141: What lights would you see on the Illinois water way 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. Red over green N b. Green over red Y c. Red over amber (yellow) N d. Green over amber (yellow) 2222: By convention, the south pole of a magnet is painted __________.
N a. red Y b. blue N c. white N d. black 2309: The plane of the ecliptic is inclined to the plane of the celestial equator by what angle?
N a. 00°23' Y b. 23°27' N c. 45°00' N d. 90°00' 2309: The plane of the ecliptic is inclined to the plane of the celestial equator by what angle?
N a. 00°23' Y b. 23°27' N c. 45°00' N d. 90°00' 2346: The first point of Aries is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south Y c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2400: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light on the facility light up. What does this indicate?
N a. A barge at the facility has commenced transferring a hazardous cargo. N b. A barge carrying a hazardous cargo is mooring or unmooring at the facility. N c. The facility is warning a barge to shut down transfer operations due to weather conditions (electrical storm, tornado, hurricane, etc.). Y d. There is danger at the facility due to a fire or cargo release. 2470: You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?
N a. 016° Y b. 074° N c. 254° N d. 270° 2470: You are on course 344°T and take a relative bearing of a lighthouse of 090°. What is the true bearing to the lighthouse?
N a. 016° Y b. 074° N c. 254° N d. 270° 2509: All persons or vessels within the lock area, including the lock approach channels, come under the authority of the __________.
N a. dockmaster N b. dock captain Y c. lockmaster N d. lock foreman 2597: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. fix N b. running fix Y c. estimated position N d. dead-reckoning position 2702: You must draw a plotting sheet covering latitudes 46°N to 48°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 2 7/8 inches, what is the distance between latitude 46°N and 48°N?
Y a. 8.4 inches N b. 8.1 inches N c. 7.9 inches N d. 7.7 inches 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) 2801: Mean high water is used __________.
N a. as the reference for soundings on the Gulf coast of the U.S. Y b. to indicate the shoreline where there is a large tidal fluctuation N c. as the reference plane for bottom contour lines N d. as the sounding datum for rivers, lakes, etc. regulated by locks 2940: On the Corps of Engineer's Navigation Maps, the channel is __________.
N a. midway between the banks N b. indicated by depths (in feet) Y c. indicated by a broken line N d. not indicated 2982: You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix? -
Y a. 019° N b. 084° N c. 166° N d. 281°