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 29: You are approaching a multiple-span bridge at night. The main navigational channel span will be indicated by __________.
N a. a quick flashing red or green aid to navigation N b. a steady blue light in the center of the span Y c. 3 white lights in a vertical line in the center of the span N d. a flashing green light in the center of the span 80: When the moon is at first quarter or third quarter phase, what type of tides will occur?
N a. Apogean N b. Perigean Y c. Neap N d. Spring 177: How many high waters usually occur each day on the East Coast of the United States?
N a. One Y b. Two N c. Three N d. Four 276: The region of high pressure extending around the Earth at about 35°N latitude is called the __________.
N a. prevailing westerlies Y b. horse latitudes N c. troposphere N d. doldrums 309: 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. What course should you steer at 12 knots to have the maximum CPA?
N a. 332° N b. 339° Y c. 346° N d. 357° 352: Which chart projection would be most suitable for marine surveying?
N a. Gnomonic N b. Lambert conformal N c. Mercator Y d. Polyconic 358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983?
N a. 015° Y b. 125° N c. 162° N d. 225° 437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?
N a. 22.4 feet (6.8 meters) Y b. 23.4 feet (7.2 meters) N c. 24.9 feet (7.6 meters) N d. 25.7 feet (7.8 meters) 444: A sylphon cell is a part of a __________.
N a. maximum thermometer Y b. barograph N c. thermograph N d. hygrometer 478: The velocity of the apparent wind can be more than the true wind, and come from the same direction, if certain conditions are present. One condition is that the __________.
N a. ship's speed must be less than the true wind velocity N b. true wind must be from dead astern N c. true wind velocity must be faster than the ship's speed Y d. true wind must be from dead ahead 489: You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?
Y a. Get underway and be in deep, open-ocean water when the tsunami arrives. N b. Increase the scope of the anchor cable and drop the second anchor underfoot at short stay. N c. Get underway and be close inshore on the side of the island away from the tsunami. N d. Plant both anchors with about a 60° angle between them, and let out a long scope to each anchor. 520: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
Y a. 5-fathom curve N b. prohibited area N c. lighted buoy N d. radio beacon 533: You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0°. If bearings are measured in relation to the flash, what type of bearings are produced?
Y a. Relative N b. True N c. Compass N d. Magnetic 603: What is the approximate wave length of an X Band Radar operating on a frequency of approximately 9500 MHz?
Y a. 3 cm N b. 10 cm N c. 30 cm N d. 100 cm 660: What is the length of a nautical mile?
N a. 1,850 meters N b. 5,280 feet N c. 1,760 yards Y d. 6,076 feet 716: Standard atmospheric pressure in inches of mercury is __________.
N a. 30.00 N b. 28.92 Y c. 29.92 N d. 29.00 725: The First Point of Aries is the position of the Sun on the celestial sphere on or about __________.
Y a. March 21 N b. June 21 N c. September 21 N d. December 21 841: Under the IALA-A Buoyage system, a buoy marking the port hand of the channel when approaching from seaward may NOT have a __________.
N a. red light Y b. conical shape N c. group-flashing light N d. square topmark 869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.
Y a. January through March N b. April through May N c. June through August N d. September through November 904: All of the following are associated with cumulonimbus clouds EXCEPT __________.
Y a. steady rainfall N b. hail storms N c. thunderstorms N d. tornadoes or waterspouts 954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.
N a. altostratus N b. stratus N c. cumulus Y d. cirrus 958: You are preparing a weather report form. Twenty-five percent of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 062° relative at 13 knots. You are on course 238°T at 22 knots. How should you encode group Nddff? (D041NG )
Y a. 20220 N b. 20613 N c. 30219 N d. 32413 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 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% 1084: As the temperature of an air mass decreases, the __________.
N a. absolute humidity decreases Y b. relative humidity increases N c. specific humidity decreases N d. dew point rises 1222: On entering from seaward, a starboard side daymark will __________.
N a. show a fixed red light if lighted N b. show a Morse (A) white light N c. be square in shape Y d. have an even number if numbered 1230: Weather forecast messages are usually __________.
N a. given only to TV stations N b. transmitted only by commercial broadcast stations Y c. broadcast in plain language N d. broadcast immediately on VHF Channel 16 and 2182 kHz 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 1300: You are approaching a sea buoy which emits a racon signal. This signal is triggered by which type of radar?
Y a. 3 cm N b. 10 cm N c. Both 3 cm and 10 cm N d. Signal does not depend on radar type. 1366: Clouds appearing in the following order: cirrus, cirrostratus, altostratus, stratus, and nimbostratus usually indicate the approach of a(n) __________.
Y a. warm front N b. occluded front N c. medium front N d. cold front 1445: The planet Mars will have its greatest magnitude when at __________.
N a. conjunction Y b. opposition N c. east quadrature N d. west quadrature 1462: Altocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 3 N c. 4 Y d. 5 1550: Cirrus clouds are indicated by which number? (D039NG )
Y a. 1 N b. 4 N c. 5 N d. 7 1569: Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.
N a. an increase in temperature N b. an increase in the wave period N c. the wind velocity Y d. the decrease in atmospheric pressure 1571: Which sextant in illustration D043NG reads 29°42.7'? (D043NG )
Y a. A N b. B N c. C N d. D 1616: Which picture in illustration D034NG shows a Morse (A) light? (D034NG )
N a. A N b. B N c. C Y d. D 1634: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
Y a. red light N b. white light N c. green light N d. light characteristic of Morse (A) 1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.
N a. pressure gradient Y b. Coriolis effect N c. aurora borealis N d. ballistic deflection 1786: You are downbound approaching a lock and see 3 green lights in a vertical line. This indicates __________.
N a. that the lock chamber is open and ready to receive your tow N b. that you should hold up until the signal changes to 2 green lights Y c. the upstream end of the river wall N d. the upstream end of the land wall 2059: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D038NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 2119: Which stock number indicates an NGA (NIMA) chart designed for fixing positions at sea and DR plotting while on a long voyage?
Y a. WOAGN520 N b. PILOT16 N c. 16BCO16212 N d. WOPZC5245 2178: The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?
N a. They are not subject to permanent magnetism; no check is necessary. N b. Semiannually Y c. Annually N d. Every five years 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 2354: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of magnets are to port you should lower the athwartships tray. N c. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y d. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. 2434: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are aft you should lower the fore-and-aft tray. Y b. If the red ends of the magnets are forward, and the fore-and-aft tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to port you should raise the athwartships tray. N d. If the red ends of the magnets are to port, and the athwartships tray is at the top, you should reverse the magnets. 2438: The radar control that reduces weak echoes out to a limited distance from the ship is the __________.
Y a. sensitivity time control (sea-clutter control) N b. receiver gain control N c. brilliance control N d. fast time constant (differentiator) 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. 2539: Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is on the __________.
N a. north side of the mark N b. west side of the mark Y c. east side of the mark N d. south side of the mark 2674: In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceeding downstream will __________.
N a. have the upper band red N b. show a red light if lighted N c. have a characteristic of composite group flashing if lighted Y d. All of the above 2682: Sidereal time is used by navigators when __________.
N a. used with the equation of time Y b. used in the form of LHA Aries N c. calculating the time of moonrise N d. determining local apparent time 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 2707: You will find information about the duration of slack water in the __________.
Y a. Tidal Current Tables N b. Tide Tables N c. American Practical Navigator N d. Sailing Directions 2739: A daymark used to indicate the starboard side of the channel when approaching from seaward will have the shape indicated by what letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2762: You take a bearing of 176° of a lighthouse. Which bearing of another object would give the best fix?
Y a. 079° N b. 151° N c. 176° N d. 292° 2816: The length of a wave is the length __________.
N a. of the wave's crest N b. of the wave's trough N c. measured from crest to trough Y d. measured from crest to crest 2895: A white buoy with an orange rectangle on it is a(n) __________.
N a. junction buoy N b. safe water buoy Y c. informational buoy N d. All of the above 2920: Navigation charts of the Upper Mississippi River are published by __________.
N a. National Ocean Service N b. Lake Survey Y c. Corps of Engineers, U.S. Army N d. U.S. Coast Guard 2970: The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel __________.
N a. ascending the river Y b. descending the river N c. crossing the river N d. proceeding from seaward 3107: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
Y a. Port of origin N b. Name of vessel N c. Course and speed over ground N d. Draft of vessel