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.
2: On an isomagnetic chart, the line of zero variation is the __________.
N a. zero variation line N b. isogonic line N c. variation line Y d. agonic line 6: Wind velocity varies __________.
N a. directly with the temperature of the air mass Y b. directly with the pressure gradient N c. inversely with the barometric pressure N d. inversely with the absolute humidity 63: A "full service" Loran-C receiver will provide __________.
N a. matching pulse rates of at least 20 stations N b. an automatic on-and-off switch N c. a horizontal matching of all delayed hyperbolic signals Y d. automatic signal acquisition and cycle matching 65: The LMT of LAN is 1210. Your longitude is 70°30'E. Which time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?
N a. 1842 N b. 1652 Y c. 0728 N d. 0652 82: On the west coast of North America, charted depths are taken from __________.
N a. high water N b. mean tide level N c. mean low water Y d. mean lower low water 185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W N b. 52°30'W N c. 60°00'W Y d. 67°30'W 294: What is a nonadjustable error of the sextant?
Y a. Prismatic error N b. Index error N c. Side error N d. Error of collimation 401: You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?
Y a. Alter course to port and leave the buoy to starboard. N b. Alter course to starboard and leave the buoy to port. N c. Alter course and leave the buoy near by on either side. N d. Alter course and pass the buoy well-off on either side. 415: If the Sun's observed altitude is 54°30', what is the zenith distance?
Y a. 35°30' N b. 45°30' N c. 12°30' N d. 14°30' 444: A sylphon cell is a part of a __________.
N a. maximum thermometer Y b. barograph N c. thermograph N d. hygrometer 472: Which conic projection chart features straight lines which closely approximate a great circle?
N a. Polyconic Y b. Lambert conformal N c. Orthographic N d. Stereographic 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. 722: Which publication would describe the explosive anchorages in the ports on the east coast of the United States?
N a. Sailing Directions N b. Pilot Rules for Inland Waters Y c. Coast Pilot N d. Notice to Mariners 733: What would give the best radar echo?
N a. The beam of a three masted sailing vessel with all sails set. N b. A 110-foot fishing vessel with a radar reflector in its rigging. N c. A 300-foot tanker, bow on. Y d. A 600-foot freighter, beam on. 735: The period of the Earth's revolution from perihelion to perihelion is the __________.
N a. astronomical year Y b. anomalistic year N c. solar year N d. sidereal year 757: The term "flood current" refers to that time when the water __________.
Y a. is flowing towards the land N b. is moving towards the ocean N c. level is not changing N d. level is rising because of heavy rains 812: You are informed of defects or changes in aids to navigation by __________.
N a. Local Notice to Mariners N b. Weekly Notice to Mariners N c. marine broadcasts Y d. All of the above 833: The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the __________.
N a. north magnetic pole N b. south magnetic pole N c. magnetic prime vertical meridian Y d. magnetic equator 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 872: Which agency publishes the Light Lists?
Y a. United States Coast Guard N b. National Ocean Service N c. Oceanographic Office N d. Army Corps of Engineers 942: Light Lists for coastal waters are __________.
N a. published every year and require no corrections N b. published every second year and must be corrected N c. published every five years and require no correction Y d. accurate thru NM number on title page and must be corrected 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 1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?
N a. 10 January Y b. 27 March N c. 22 June N d. 8 October 1154: The speed at which an ocean wave system advances is called __________.
N a. wave length N b. ripple length Y c. group velocity N d. wave velocity 1216: In the Northern Hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a __________.
Y a. cold front has passed N b. low pressure center is approaching N c. stationary front exists N d. high pressure center has passed 1256: A cold front moving in from the northwest can produce __________.
Y a. thunderstorms, hail, and then rapid clearing N b. increasing cloud cover lasting for several days N c. lengthy wet weather N d. low ceilings with thick cirrus clouds 1278: The difference between the heights of low and high tide is the __________.
N a. depth N b. distance Y c. range N d. period 1331: When trying to sight a lighthouse you notice a glare from a town in the background. The range at which the light may be sighted due to this glare is __________.
Y a. considerably reduced N b. increased slightly due to extra lighting N c. unchanged N d. increased if the light is red or green due to contrast with the glare 1359: The distance in longitude from the intersection of a great circle and the equator to the lower vertex is how many degrees of longitude?
N a. 45° Y b. 90° N c. 135° N d. 180° 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 1402: As a vessel changes course to starboard, the compass card in a magnetic compass __________.
N a. first turns to starboard then counterclockwise to port N b. also turns to starboard N c. turns counterclockwise to port Y d. remains aligned with compass north 1427: Determine the duration of the first PM slack water on 3 March 1983, east of the Statue of Liberty, when the current is less than 0.1 knot?
N a. 10 minutes Y b. 13 minutes N c. 16 minutes N d. 19 minutes 1544: The height of a tide can be increased by __________.
Y a. a storm surge N b. a high pressure area N c. the jet stream N d. a cold front 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 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 1629: Air temperature varies with __________.
N a. the altitude above sea level N b. the season of the year N c. the latitude or distance from the equator Y d. All of the above 1753: On a weather map, a large letter "H" means __________.
Y a. a high pressure area with cool, dry air, and fair weather N b. a high pressure area with warm, moist air, and inclement weather N c. horse latitudes, with rough seas and strong winds N d. a heavy squall line near the "H" 1764: What natural feature is responsible for the rather even climate found on the Florida peninsula throughout the year?
N a. Strong masses of continental air Y b. The Gulf Stream N c. The Bermuda high N d. The cool waters of the Sargasso sea 1775: The letter A in illustration D006NG represents the __________.
N a. celestial horizon N b. geoidal horizon Y c. sensible horizon N d. visible horizon 1831: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
N a. red conical buoy N b. black can buoy Y c. red can buoy N d. black conical buoy 1832: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic northeast or magnetic southeast?
N a. Flinders bar N b. Heeling magnets N c. Fore-and-aft magnets Y d. Quadrantal spheres 1880: A vessel heading SSW is on a course of __________.
Y a. 202.5° N b. 225.0° N c. 247.5° N d. 270.0° 1910: What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?
N a. Phase Y b. Parallax N c. Semidiameter N d. Augmentation 2192: Off Fire Island, NY, with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 256° N b. 170° Y c. 076° N d. 014° 2272: Mars will not be visible __________.
N a. at elongation angles near 180° N b. from quadrature to opposition Y c. at conjunction N d. at opposition 2272: Mars will not be visible __________.
N a. at elongation angles near 180° N b. from quadrature to opposition Y c. at conjunction N d. at opposition 2348: Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on the __________.
N a. north side of the mark Y b. west side of the mark N c. east side of the mark N d. south side of the mark 2436: Aphelion is the point where the Sun __________.
N a. and Moon and Earth form a right angle N b. and Moon and Earth are in line N c. crosses the celestial equator Y d. is farthest from the Earth 2486: What is the equivalent of 23 min. 20 sec. in arc units?
N a. 16°40' N b. 12°32' N c. 9°28' Y d. 5°50' 2680: The angle measured eastward from the vernal equinox along the celestial equator often expressed in time units is the __________.
N a. Greenwich sidereal time Y b. right ascension N c. local sidereal time N d. sidereal hour angle 2705: Information about the direction and velocity of rotary tidal currents is found in the __________.
Y a. Tidal Current Tables N b. Mariner's Guide N c. Tide Tables N d. Nautical Almanac 2768: Which type of daymark is used to mark the starboard side of the channel when entering from sea?
N a. Red and white octagon N b. Black and white diamond Y c. Red triangle N d. Green square 2792: You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?
N a. 081° N b. 238° Y c. 201° N d. 234° 2890: While passing through Memphis, the weather report on the TV news indicates that a cold front is crossing western Kentucky and Tennessee. Tomorrow's weather will be dominated by a high pressure area. What weather should you expect tomorrow?
N a. Light, southerly winds; high humidity and possibly fog Y b. Moderate winds from the northwest, clear visibility and cooler temperatures N c. Low overcast; mild temperatures with light, steady rain or drizzle N d. Scattered clouds with light, southeasterly winds; high humidity and possibly fog 2959: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. time of the next navigational satellite N b. distance to the next port Y c. speed of the vessel over the ground or through the water N d. None of the above 3033: A navigator fixing a vessel's position by radar __________.
Y a. can use radar information from one object to fix the position N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon N d. must use information from targets forward of the beam 3035: A major advantage of the NAVTEX system when compared to other systems is that __________.
N a. the information can be received on an ordinary FM radio Y b. warnings are printed out for reading when convenient N c. broadcasts are at scheduled times N d. a low frequency band is used for long distance transmission 3054: In illustration D051NG, the position labeled C was plotted because __________.
Y a. running fixes are better estimates of true position than dead-reckoning positions are N b. the vessel's course changed from due North to due East N c. the vessel's speed changed N d. All of the above are correct 3072: ECDIS must give an alarm for which of the following cases?
N a. When the specified limit for deviation from the planned route is exceeded N b. If the ship, within a specified time set by the watch officer, is going to cross a safety contour N c. If the ship, within a specified time set by the watch officer, is going to cross the boundary of a prohibited area Y d. All of the above 3088: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
N a. an alarm if engine speed is suddenly increased Y b. an alarm if a new position has not been calculated within the last two seconds N c. an indication of a change in the number of satellites N d. None of the above.