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.
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 213: When using GPS, how many theoretical position lines are required for a two-dimensional fix?
N a. 1 N b. 2 Y c. 3 N d. 4 258: 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. cirrus clouds N b. long swells N c. smoother seas and warmer water Y d. steeper waves, closer together 280: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the port side of the channel Y b. safe water N c. a hazard to navigation N d. the position of underwater cables 285: The apparent wind is zero when the true wind is __________.
N a. zero N b. from ahead and equal to the ship's speed Y c. from astern and equal to the ship's speed N d. from astern and is twice the ship's speed 307: The time meridian that is used when computing the currents for Pensacola Bay, Florida, is __________.
N a. 60°W N b. 75°W Y c. 90°W N d. 105°W 314: Which of these sextant errors is nonadjustable?
N a. Prismatic error N b. Graduation error N c. Centering error Y d. All of the above 325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'?
N a. 30°30'E N b. 59°30'W N c. 120°30'W Y d. 149°30'E 340: Information about the direction and velocity of rotary tidal currents is found in the __________.
N a. Mariner's Guide N b. Nautical Almanac N c. Tide Tables Y d. Tidal Current Tables 367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983?
N a. 0936 N b. 0942 Y c. 0951 N d. 1001 368: A great circle crosses the equator at 134°E. It will also cross the equator at what other longitude?
Y a. 46°W N b. 124°W N c. 134°W N d. 34°E 454: On what does the operation of an aneroid barometer depend?
Y a. Thin, metal, air tight cell N b. Curved tube containing alcohol N c. Column of mercury supported by atmospheric pressure N d. Expansion of mercury in a closed tube 551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?
N a. A topmark triangular in shape N b. A topmark spherical in shape Y c. Lettering on the buoy N d. A topmark consisting of two cones with the points up 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 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 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 642: Which government agency publishes the U.S. Coast Pilot?
N a. Army Corps of Engineers N b. National Geospatial-Intelligence Agency Y c. National Ocean Service N d. U.S. Coast Guard 752: Which publication would NOT be used on a voyage from Houston to New York?
N a. Coast Pilot N b. Light List N c. Radio Navigational Aids Y d. Sailing Directions (Enroute) 755: The sidereal day begins when the __________.
N a. Sun is over the lower branch of the reference meridian N b. Sun is over the upper branch of the reference meridian N c. first point of Aries is over the lower branch of the reference meridian Y d. first point of Aries is over the upper branch of the reference meridian 776: You are navigating in pilotage waters using running fixes. The maximum time between fixes should be about __________.
N a. 4 hours N b. 1 hour Y c. 30 minutes N d. 5 minutes 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 986: A warm air mass is characterized by __________.
Y a. stability N b. instability N c. gusty winds N d. good visibility 1094: A light, feathery deposit of ice caused by the sublimation of water vapor directly into the crystalline form, on objects whose temperatures are below freezing, is called __________.
N a. dew Y b. frost N c. glaze N d. snow 1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.9 nm N b. 14.3 nm Y c. 15.7 nm N d. 17.4 nm 1127: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
Y a. at slack water N b. at flood tide N c. when there is a following current N d. at high water 1131: On navigational aids, what does the light characteristic "Fl(2+1)" mean?
N a. A flashing light combined with a fixed light of greater brightness Y b. Light flashes combined in groups, with a different number of flashes in each group N c. A light showing groups of two or more flashes at regular intervals N d. A fixed light varied at regular intervals by groups of two or more flashes of greater brightness 1137: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
Y a. become weak and variable N b. exceed the predicted velocities N c. become reversing currents N d. have either a double ebb or a double flood 1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 014° Y b. 076° N c. 170° N d. 256° 1243: Magnetic heading differs from compass heading by __________.
N a. compass error N b. true heading N c. variation Y d. deviation 1330: You are located within a stationary high pressure area. Your aneroid barometer is falling very slowly. This indicates a(n) __________.
N a. wind shift of 180° N b. large increase in wind velocity Y c. decrease in the pressure of the system N d. increase in the intensity of the system 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 1413: The gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction is called __________.
N a. damping error N b. ballistic deflection N c. quadrantal error Y d. speed error 1474: You are on course 061°T. To check the longitude of your vessel you should observe a celestial body on which bearing?
Y a. 090° N b. 180° N c. 241° N d. 061° 1600: Zenith distance is equal to __________.
Y a. 90° - Ho N b. 90° - d N c. Ho° + d N d. 90° - z 1666: The process by which the temperature and/or moisture characteristics of an air mass changes is called __________.
N a. sublimation or condensation Y b. modification N c. consolidation N d. association 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 1695: Compared to a low pressure system, generally the air in a high is __________.
N a. warmer, less dense, and less stable Y b. cool, more dense, and drier N c. muggy and cloudy N d. extremely moist with high relative humidity 1714: Which statement concerning storm surges on the Great Lakes is FALSE?
Y a. They are common along the deeper areas of the lakes. N b. They cause rapid differences in levels between one end of the lake and the other. N c. The greatest water level difference occurs when the wind is blowing along the longitudinal axis of the lake. N d. If the wind subsides rapidly, a seiche effect will most likely occur. 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 1749: If the current and wind are in opposite directions, the sea surface represents __________.
N a. a greatly reduced wind speed Y b. a higher wind speed than what really exists N c. a lower wind speed than what really exists N d. more turbulent winds 1941: 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. red can buoy N b. red conical buoy N c. green can buoy Y d. green conical buoy 1952: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in longitude Y b. Geocentric libration N c. Diurnal libration N d. Physical libration 1996: When approaching a lock entrance, the visual signal displayed when a single lock is ready for entrance is a flashing __________.
N a. red light Y b. green light N c. amber light N d. white light 2298: The period of rotation of the Moon on its axis is __________.
N a. about 19 years N b. 365 days Y c. about 27.3 days N d. 24 hours 2310: Which weather instrument measures atmospheric pressure?
N a. Beaufort scale N b. Anemometer N c. Sling psychrometer Y d. Barometer 2336: The period of revolution of the Moon is __________.
N a. 24 hours Y b. about 27.3 days N c. 365 days N d. about 19 years 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 2626: What information is found in the chart title?
N a. Date of the first edition N b. Date of the edition and, if applicable, the revision Y c. Information on the sounding datum N d. Information on which IALA buoyage system applies 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 2679: Under the U.S. Aids to Navigation System on the Western Rivers, a daymark on the right descending bank will __________.
Y a. be green N b. have an odd number N c. indicate the gage reading N d. have yellow retroreflective markings 2700: In the horizon system of coordinates what is equivalent to the meridian angle of the celestial equator system?
Y a. Azimuth angle N b. Zenith distance N c. Colatitude N d. Altitude 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2779: The buoy indicated by the letter B in illustration D044NG is a __________.
N a. nun N b. can Y c. spar N d. pillar 2814: In low latitudes the range of the diurnal variation of pressure is up to __________.
N a. 0.5 millibar Y b. 3.0 millibars N c. 6.0 millibars N d. 10.0 millibars 2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )
N a. A N b. B Y c. C N d. D 2918: Which agency maintains federal aids to navigation?
N a. Corps of Engineers Y b. Coast Guard N c. National Ocean Service N d. Maritime Administration 3016: The radar control that shortens all echoes on the display and reduces clutter caused by rain or snow is the __________.
N a. sensitivity time control (sea clutter control) N b. receiver gain control N c. brilliance control Y d. fast time constant (differentiator) 3103: In general, on how many radio channels will an automatic identification system (AIS) operate?
N a. 1 Y b. 3 N c. 4 N d. 12 3121: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to___.
N a. 64 characters N b. 96 characters Y c. 158 characters N d. 256 characters