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.
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 52 105: If the GMT is 1500, the time at 75°E longitude is __________.
N a. 1000 N b. 1500 N c. 1700 Y d. 2000 134: The recording fathometer produces a graphic record of the __________.
N a. bottom contour only up to depths of 100 fathoms Y b. depth underneath the keel against a time base N c. contour of the bottom against a distance base N d. depth of water against a distance base 149: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
N a. 339° Y b. 333° N c. 326° N d. 320° 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. 4 259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )
N a. convergence zone N b. squall line Y c. convergence line N d. weather boundary 363: Your dead reckoning position should be plotted __________.
N a. whenever an estimated position is plotted N b. when it agrees with your loran position N c. when coming on or going off soundings Y d. at least every hour on the hour in the open waters of the sea 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 396: Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?
N a. 9.0 knots N b. 10.2 knots Y c. 11.0 knots N d. 12.0 knots 405: At upper transit, if the zenith distance is 34°, the geographical distance from the observer to a body's GP is __________.
N a. 510 miles N b. 1220 miles Y c. 2040 miles N d. 2260 miles 462: For what purpose would using a Lambert conformal chart be more convenient than using a Mercator?
Y a. Plotting radio bearings over a long distance N b. Determining latitude and longitude of a fix N c. Measuring rhumb line distances N d. Measuring rhumb line directions 536: You are enroute from Puerto Rico to New York. A hurricane makes up and is approaching. If the wind veers steadily, this indicates that your vessel is __________.
Y a. in the dangerous semicircle N b. in the navigable semicircle N c. directly in the path of the storm N d. in the storm center 652: What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?
Y a. National Ocean Service N b. National Imagery and Mapping Agency N c. U.S. Coast Guard N d. U.S. Naval Observatory 732: What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?
N a. Light List Y b. Coast Pilot N c. Sailing Directions N d. Pilot Chart 769: What does not contribute to the commercial GPS receiver position error?
N a. Satellite clock Y b. Ship's speed N c. Atmospheric/Ionospheric propagation N d. Satellites' orbits 801: You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?
Y a. Alter course to leave the buoy to port N b. Alter course to leave the buoy to starboard N c. Pass the buoy close aboard on either side N d. Pass the buoy well clear on either side 903: Eight points of a compass are equal to how many degrees?
N a. 45 Y b. 90 N c. 180 N d. 360 906: In the Northern Hemisphere, an area of counterclockwise wind circulation surrounded by higher pressure is a __________.
Y a. low N b. high N c. warm front N d. cold front 999: You are preparing a weather report form, WS Form B-80. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff? (D041NG )
N a. 80208 N b. 72218 N c. 72318 Y d. 62324 1038: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 54°F, and the wet bulb thermometer reads 50°F. How would you encode the air temperature groups in the report? (D041NG )
N a. 1054/, 2050/ Y b. 10122, 2008/ N c. 1054/, 2047/ N d. 054//, 047// 1050: The passing of a low pressure system can be determined by periodically checking the __________.
N a. thermometer N b. hygrometer Y c. barometer N d. anemometer 1055: The radius of a circle of equal altitude for a body equals the body's __________.
N a. declination N b. polar distance N c. altitude Y d. zenith distance 1058: You are preparing a weather report form, WS Form B-80. Your position is LAT 64°42'N, LONG 02°28'W. How would this be encoded? (D041NG )
N a. 90647, 90024 N b. 0647N, 00025 Y c. 99647, 70025 N d. 9064N, 9025W 1068: A vessel sighting a northern right whale dead ahead should __________.
N a. maintain course and speed Y b. alter course to give a wide clearance N c. report the whale's position to the Canadian Coast Guard N d. All of the above 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 1164: The largest waves (heaviest chop) will usually develop where the wind blows __________.
N a. at right angles to the flow of the current Y b. against the flow of the current N c. in the same direction as the flow of the current N d. over slack water 1181: An occulting light is one in which __________.
N a. the period of darkness exceeds the period of light N b. there is only a partial eclipse of the light N c. the periods of light and darkness are equal Y d. the period of light exceeds the period of darkness 1203: If the compass heading and the magnetic heading are the same then __________.
N a. the deviation has been offset by the variation N b. there is something wrong with the compass N c. the compass is being influenced by nearby metals Y d. there is no deviation on that heading 1228: "An electronic or electric device that indicates the rate of turn of a vessel," defines a/an _____________ .
N a. magnetic compass N b. gyro-compass Y c. swing meter N d. odometer 1257: What will be the velocity of the tidal current 1.0 mile southwest of Lewis Pt., RI, at 1501 EST (ZD +5) on 4 April 1983?
Y a. 0.7 knot N b. 1.4 knots N c. 1.6 knots N d. 1.9 knots 1263: The compass deviation changes as the vessel changes __________.
N a. geographical position N b. speed Y c. heading N d. longitude 1303: Compass deviation is caused by __________.
N a. magnetism from the earth's magnetic field N b. misalignment of the compass Y c. magnetism within the vessel N d. a dirty compass housing 1303: Compass deviation is caused by __________.
N a. magnetism from the earth's magnetic field N b. misalignment of the compass Y c. magnetism within the vessel N d. a dirty compass housing 1337: What will be the time of maximum flood current at Sagamore Bridge on the Cape Cod Canal during the morning of 6 December 1983 (ZD +5)?
Y a. 0708 N b. 0712 N c. 0716 N d. 1020 1353: The difference in degrees between true north and magnetic north is called __________.
Y a. variation N b. deviation N c. drift N d. compass error 1363: True heading differs from magnetic heading by __________.
N a. deviation Y b. variation N c. compass error N d. northerly error 1587: In general, the most effective period for observing stars and planets occurs during the darker limit of __________.
N a. sunset Y b. civil twilight N c. nautical twilight N d. astronomical twilight 1648: A sign of thunderstorm development is a cumulus cloud __________.
N a. darkening, growing in size and forming an anvil top N b. that shows extensive vertical development N c. creating cold downdrafts that are felt on the ground Y d. All of the above 1734: The eye of the hurricane has __________.
N a. very high barometric pressure N b. average barometric pressure Y c. the lowest barometric pressure N d. no change in barometric pressure 1776: A vessel operating on the Great Lakes, and whose position is southeast of an eastward-moving storm center, would NOT experience __________.
N a. a falling barometer N b. lowering clouds and drizzle Y c. a northeast wind N d. rain or snow 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 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 1930: The phase correction should be applied to sights of Venus and Mars __________.
N a. during day time observations only Y b. during twilight observations only N c. at all times N d. when observed at altitudes of less than 25° 1948: "Space motion" is the __________.
N a. action causing precession of the equinoxes Y b. motion of a body in the solar system relative to the stars N c. motion of a celestial body in its orbit N d. irregularity in the motion of the Earth caused by other celestial bodies 1961: What kind of pressure systems travel in tropical waves?
N a. Subsurface pressure N b. Terrastatic pressure N c. High pressure Y d. Low pressure 2010: A vessel heading ESE is on a course of __________.
Y a. 112.5° N b. 135.0° N c. 157.5° N d. 180.0° 2074: When approaching a lock and at a distance of not more than a mile, vessels desiring a single lockage shall sound which signal?
Y a. One long blast followed by one short blast N b. One short blast followed by one long blast N c. Two short blasts N d. Two long blasts 2163: The letter C in illustration D006NG represents the __________.
N a. visible horizon N b. geoidal horizon Y c. celestial horizon N d. sensible horizon 2314: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. N b. If the blue ends of the magnets are aft you should lower the fore-and-aft tray. Y c. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets. N d. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the bottom, you should reverse the magnets. 2388: The reference point for determination of GMT is the passage of the mean sun over what line?
N a. First point of Aries N b. Observer's meridian N c. 0° longitude Y d. 180° longitude 2420: You are on course 355°T and take a relative bearing of a lighthouse of 275°. What is the true bearing of the lighthouse?
N a. 080° N b. 085° N c. 280° Y d. 270° 2481: The letter D as shown represents the __________. (D006NG )
N a. celestial horizon N b. sensible horizon Y c. geometrical horizon N d. visible horizon 2590: A plane perpendicular to the polar axis will never form what line on the Earth's surface?
N a. Great circle N b. Equator N c. Small circle Y d. Meridian 2600: A parallel of latitude other than the equator is a __________.
N a. great circle N b. loxodromic curve Y c. small circle N d. gnomonic curve 2619: In low latitudes, a first quarter Moon will always rise at about __________.
N a. sunrise Y b. 1200 LMT N c. sunset N d. 2400 LMT 2689: The letter D in illustration D006NG represents __________. (D006NG )
Y a. geometrical horizon N b. visible horizon N c. celestial horizon N d. sensible horizon 2991: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
N a. objects that are close aboard Y b. ranges N c. tangent bearings N d. center bearings 3030: Isogonic lines are lines on a chart indicating __________.
Y a. points of equal variation N b. points of zero variation N c. the magnetic latitude N d. magnetic dip 3117: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
Y a. Time stamp N b. IMO number N c. Type of vessel N d. Vessel's maximum displacement 3129: Which of the following statements is TRUE regarding automatic identification systems (AIS) ?
Y a. The master may, at his/her discretion, turn off the AIS if he/she believes that it may compromise the safety or security of the vessel. N b. Under no circumstances shall AIS be turned off while underway as this could endanger the vessel and those around her. N c. AIS is always required to be operating if the vessel is in or in the vicinity of a VTS area. N d. AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline.