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.
11: A buoy having red and green horizontal bands would have a light characteristic of __________.
N a. interrupted quick flashing Y b. composite group flashing N c. Morse (A) N d. quick flashing 88: Which position includes the effects of wind and current?
N a. Dead reckoning position N b. Leeway position Y c. Estimated position N d. Set position 91: A preferred-channel buoy will show a __________.
N a. white light whose characteristic is Morse (A) N b. group-occulting white light N c. composite group-flashing (2 + 1) white light Y d. composite group-flashing (2 + 1) red or green light 166: On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________.
N a. geostrophic winds N b. doldrums N c. horse latitudes Y d. prevailing westerlies 269: The wind at Frying Pan shoals has been south-southwesterly at an average velocity of 30 knots. The predicted set and drift of the rotary current are 232° at 0.8 knot. What current should you expect?
N a. 065° at 1.2 knots N b. 092° at 1.3 knots N c. 139° at 0.6 knot Y d. 224° at 0.4 knot 278: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?
N a. 84 miles N b. 79 miles N c. 74 miles Y d. 66 miles 305: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
Y a. red can buoy N b. black can buoy N c. red conical buoy N d. black conical buoy 312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.
N a. 11.5 fathoms Y b. 12.6 fathoms N c. 69.0 feet N d. 78.6 feet 342: A polyconic projection is based on a __________.
N a. plane tangent at one point N b. cylinder tangent at one parallel N c. cone tangent at one parallel Y d. series of cones tangent at selected parallels 429: A great circle crosses the equator at 127°W. It will also cross the equator at what other longitude?
N a. 127°E Y b. 53°E N c. 27°E N d. 27°W 444: A sylphon cell is a part of a __________.
N a. maximum thermometer Y b. barograph N c. thermograph N d. hygrometer 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.
Y a. 30.05 inches of mercury N b. 30.05 millimeters of mercury N c. 30.05 millibars N d. falling 505: The error in the measurement of the altitude of a celestial body, caused by refraction, increases as the __________.
N a. horizontal parallax decreases N b. observer's height above sea level increases N c. humidity of the atmosphere decreases Y d. altitude of the body decreases 569: A line of position formed by sighting two charted objects in line is called a(n) __________.
N a. relative bearing Y b. range line N c. track line N d. estimated position 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 627: You are on a coastwise voyage bound for Marcus Hook, PA. Your speed is 15 knots. You wish to use the flood tide to facilitate docking starboard side to, heading seaward. To have the most favorable tide throughout, you should time your arrival at the entrance to Delaware Bay __________.
N a. for 1 hour before flood begins N b. for 1 hour after flood begins Y c. for 3 hours after flood begins N d. for 1 hour before ebb begins 641: Buoys which mark isolated dangers are painted with alternating _____________ .
Y a. red and black bands N b. green and black bands N c. red and white stripes N d. green and white bands 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 684: The ARPA may swap targets when automatically tracking if two targets __________.
N a. are tracked on reciprocal bearings N b. are tracked at the same range N c. are tracked on the same bearing Y d. pass close together 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 822: Charts should be corrected by using information published in the __________.
N a. Light List N b. American Practical Navigator Y c. Notice to Mariners N d. Coast Pilot 828: The true wind has been determined to be from 210°T, speed 12 knots. You desire the apparent wind to be 30 knots from 10° on the port bow. What course must you steer, and what speed must you make for this to occur?
Y a. 235°T, 18.6 knots N b. 245°T, 20.0 knots N c. 325°T, 22.4 knots N d. 335°T, 23.6 knots 842: Coast Pilots and navigational charts are kept corrected and up-to-date by using the __________.
N a. pilot charts Y b. Notices to Mariners N c. Tide Tables N d. Current Tables 844: A cloud of marked vertical development (often anvil-shaped) would be classified as __________.
N a. cirrus N b. cirrocumulus N c. altocumulus Y d. cumulonimbus 856: The flow of air around an anticyclone in the Southern Hemisphere is __________.
N a. clockwise and outward Y b. counterclockwise and outward N c. clockwise and inward N d. counterclockwise and inward 956: Good weather is usually associated with a region of __________.
N a. low barometric pressure Y b. high barometric pressure N c. falling barometric pressure N d. pumping barometric pressure 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 1021: You are underway in the North Sea on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. To ensure that your vessel remains in the best navigable water you would __________.
N a. continue on course and ensure that the bearings change to the left N b. pass between the buoy and another buoy showing a fixed white light N c. alter course to port and pass the buoy close aboard to either side Y d. alter course to port and pass north of the buoy 1032: What is the approximate geographic range of Point Judith Light, Rhode Island, if your height of eye is 62 feet (18.9 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.6 nm N b. 16.5 nm Y c. 18.6 nm N d. 20.7 nm 1138: On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. You must pass __________.
N a. northward of the buoy N b. southward of the buoy N c. eastward of the buoy Y d. westward of the buoy 1138: On approaching the English Channel on course 080°T, you note the symbol YBY near a charted buoy. You must pass __________.
N a. northward of the buoy N b. southward of the buoy N c. eastward of the buoy Y d. westward of the buoy 1177: The magnitude of three stars is indicated. Which star is the brightest?
Y a. Canopus - 0.9 N b. Vega + 0.1 N c. Antares + 1.2 N d. Cannot be determined; magnitude indicates size not brightness 1215: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the east N b. two zones to the west Y c. one zone to the east N d. one zone to the west 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 1311: What is the characteristic of a quick light?
N a. Shows groups of 2 or more flashes at regular intervals N b. Durations of light and darkness are equal Y c. Shows not less than 60 flashes per minute N d. Shows quick flashes for about 5 seconds followed by a 1 second dark period 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 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 1439: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "G" represents a __________. (D042NG )
N a. weather boundary N b. thunderstorm N c. wide spread sandstorm Y d. severe, line squall 1452: When is the rhumb line distance the same as the great circle distance?
N a. Course 090°T in high latitudes Y b. Course 180°T when you cross the equator N c. Course 045°T in low latitudes N d. The rhumb line distance is always longer than the great circle distance. 1592: A white buoy marked with an orange rectangle indicates __________.
N a. an anchorage N b. a fish net area N c. mid-channel Y d. general information 1636: A type of precipitation that occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level is known as __________.
N a. sleet Y b. hail N c. freezing rain N d. rime 1771: Which type of precipitation is a product of the violent convection found in thunderstorms?
N a. Snow N b. Freezing Rain Y c. Hail N d. Sleet 1778: Illustration D037NG represents a movable dam. If the wickets are down and there are open weirs due to high water, what light(s) will be shown at A if the lock walls and piers are not awash? (D037NG )
Y a. One red light N b. Two red lights N c. Three red lights N d. One green light 1790: A Doppler speed log indicates speed through the water __________.
N a. at all times N b. in the bottom return mode Y c. in the volume reverberation mode N d. only when there is no current 1887: The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
N a. 12.0 miles N b. 11.0 miles N c. 10.0 miles Y d. 9.0 miles 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 2072: The Illustration represents a movable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )
Y a. An amber light under a red light N b. A white square N c. A green triangle N d. A yellow pentagon 2114: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
N a. Sailing Directions N b. Nautical Almanac for the year N c. U.S. Coast Pilot Y d. U.S. Army Corps of Engineers Regulations (Blue Book) 2190: Clouds are classified according to their __________.
N a. size N b. moisture content Y c. altitude and how they were formed N d. location in a front 2345: You should plot your dead reckoning position __________.
N a. from every estimated position N b. every three minutes in pilotage waters N c. only in pilotage waters Y d. from every fix or running fix 2492: A star that suddenly becomes several magnitudes brighter and then gradually fades is a __________.
N a. double star N b. variable star Y c. nova N d. nebula 2518: In low latitudes, the full Moon will always rise at about __________.
N a. sunrise N b. 1200 LMT Y c. sunset N d. 2400 LMT 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 2803: Some locations maintain a zone time of -13. What are the Greenwich time and date if the zone time and date are 0152, 10 January?
Y a. 1252, 9 January N b. 1452, 9 January N c. 0052, 11 January N d. 1452, 11 January 2849: You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?
Y a. 000° N b. 066° N c. 112° N d. 271° 2960: What is NOT found in the Mississippi River System Light List?
Y a. Distance that a lighted aid to navigation can be seen at night N b. Distance between major points on the Mississippi River N c. A color plate showing the details of the aids to navigation used on the Mississippi River N d. Times of Coast Guard broadcasts concerning river stages 3000: All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the __________.
N a. east or west bank Y b. left or right descending bank N c. port or starboard side of the vessel N d. left or right ascending bank 3125: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is designed to replace ARPA, maneuvering boards, and visual bearings as a means to ascertain the risk of collision. Y b. AIS provides near real-time information regarding another vessel's speed over ground and heading regardless of visibility. N c. AIS will not provide information on another vessel if that vessel is indistinguishable in radar sea clutter. N d. AIS can be relied upon as the sole means to determine course changes due to other AIS equipped traffic.