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.
18: A vessel's position should be plotted using bearings of __________.
N a. buoys close at hand Y b. fixed known objects on shore N c. buoys at a distance N d. All of the above 55: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59'E longitude. Your LMT and date are __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 232: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. N b. The bottom to the south-southeast of the lightship is soft coral. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. Y d. There is a dangerous eddy southeast of Beito Island. 257: Spring tides occur __________.
N a. at the start of spring, when the Sun is nearly over the equator N b. only when the Sun and Moon are on the same side of the Earth and nearly in line N c. when the Sun and Moon are at approximately 90° to each other as seen from the Earth Y d. when the Sun, Moon, and Earth are nearly in line, in any order 321: Which buoy may be even numbered?
N a. Mid-channel buoy Y b. Unlighted nun buoy N c. Lighted green buoy N d. All of the above 445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.
N a. upper limb of a celestial body N b. lower limb of a celestial body Y c. centers of the various celestial bodies N d. lower limb of the Sun and Moon; center of the stars and planets 593: Radar makes the most accurate determination of the __________.
N a. direction of a target Y b. distance to a target N c. size of a target N d. shape of a target 594: Barometers are calibrated at a standard temperature of __________.
N a. 0°F Y b. 32°F N c. 60°F N d. 70°F 795: The path of a celestial body during its daily apparent revolution around the Earth is called its __________.
N a. ecliptic Y b. diurnal circle N c. altitude circle N d. circle of position 859: At 1800 ZT on 31 October, your position is LAT 24°50'N, LONG 92°37'W. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
N a. 31123, 99929, 70249 N b. 31183, 99249, 79237 N c. 31243, 99249, 70926 Y d. 01003, 99248, 70926 887: Which current would you encounter on a direct passage from southern Africa to Argentina, South America?
Y a. South Atlantic N b. South Equatorial N c. Agulhas N d. Guinea 966: Most high pressure areas in the United States are accompanied by __________.
N a. precipitation Y b. clear, cool weather N c. humid, sticky weather N d. cool fogs 1049: At 0000 you fix your position and change course to 270°T. At 0030 you again fix your position, and it is 0.5 mile east of your DR. Which statement is TRUE?
N a. The set is 090°, drift 0.5 knot. Y b. The set is 090°, drift 1.0 knot. N c. The set is 270°, drift 0.5 knot. N d. The set is 270°, drift 1.0 knot. 1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?
N a. A safe-water buoy will display red and white vertical stripes of reflective material. N b. All reflective material is white because it is the most visible at night. N c. A special-purpose mark will display either red or green reflective material to agree with its shape. Y d. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color. 1168: Which type of cloud is indicated by the number 4? (D039NG )
N a. Altocumulus N b. Cirrostratus N c. Cumulus Y d. Altostratus 1173: When adjusting a magnetic compass for error, a deviation table should be made __________.
N a. before correcting for any deviation N b. after correcting for variation Y c. after adjusting the fore-and-aft and athwartships permanent magnets N d. before the quadrantal correctors are placed on the compass 1214: The letter B in the diagram represents the __________. (D006NG )
N a. sensible horizon N b. visible horizon N c. celestial horizon Y d. geoidal horizon 1287: What will be the velocity of the tidal current 4.5 miles east of Smith Point, VA, at 0630 DST (ZD +4) on 6 May 1983?
Y a. 0.3 knot N b. 0.5 knot N c. 0.7 knot N d. 1.0 knot 1305: Complete information on weather broadcasts throughout the world is contained in __________.
Y a. Selected Worldwide Marine Weather Broadcasts N b. your local newspaper N c. the Notice to Mariners N d. the daily weather map 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 1432: What benefit is a weather bulletin to a mariner?
N a. It provides a legal reason to cancel a projected voyage. N b. It allows the mariner to make long term weather forecasts. N c. It is of little benefit since the weather changes frequently and rapidly. Y d. It gives the mariner time to prepare for weather changes. 1484: You should plot your dead reckoning position at __________.
N a. every fix or running fix N b. every course change N c. every speed change Y d. All of the above are correct. 1500: In what order should the following sextant adjustments be made? I. Make telescope parallel to frame of sextant. II. Set horizon glass perpendicular to frame of sextant. III. Make index mirror and horizon glass parallel when index arm is set at zero. IV. Set index mirror perpendicular to frame of sextant.
N a. I, II, III, IV N b. I, IV, II, III N c. III, II, IV, I Y d. IV, II, III, I 1509: Your facsimile prognostic chart indicates that you will cross the cold front of a low pressure system in about 24 hours. You should __________.
N a. expect to see cirrus clouds followed by altostratus and nimbostratus clouds N b. alter course to remain in the navigable semicircle Y c. prepare for gusty winds, thunderstorms, and a sudden wind shift N d. expect clear weather, with steady winds and pressure, until the front passes 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 1537: Which sextant in illustration D043NG reads 29°47.5'? (D043NG )
N a. A N b. B Y c. C N d. D 1618: The Light List indicates that a light has a nominal range of 14 miles and is 26 feet high. If the visibility is 4 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?
Y a. 7.5 miles N b. 9.6 miles N c. 11.2 miles N d. 14.0 miles 1639: Sextant D reads __________. (D043NG )
N a. 30°47.5' N b. 29°47.5' Y c. 29°42.5' N d. 29°41.6' 1653: In a weather report, the term "visibility" expresses __________.
N a. how far you can see with the "naked eye" N b. how far you can see with a telescope or binoculars N c. how well you can identify an object at night Y d. the distance in miles at which prominent objects are identifiable 1716: The hurricane season in the North Atlantic Ocean reaches its peak during the month of __________.
N a. June Y b. September N c. November N d. July 1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y b. a weather fax N c. the Coast Pilot or Sailing Directions N d. the sky overhead 1862: What is the relative bearing of an object broad on the starboard quarter?
N a. 090° N b. 105° Y c. 135° N d. 150° 1932: The zenith is the point on the celestial sphere that is __________.
N a. 90° away from the poles Y b. directly over the observer N c. on the eastern horizon N d. over Greenwich 1932: The zenith is the point on the celestial sphere that is __________.
N a. 90° away from the poles Y b. directly over the observer N c. on the eastern horizon N d. over Greenwich 1960: Astronomical refraction causes a celestial body to appear __________.
N a. to the left of its position in the Northern Hemisphere and to the right in the Southern Hemisphere N b. to the right of its position in the Northern Hemisphere and to the left in the Southern Hemisphere Y c. higher than its actual position N d. lower than its actual position 1979: The principal vertical circle is that great circle on the celestial sphere that passes through the __________.
N a. zenith and the celestial body Y b. zenith and the north and south poles N c. poles and Greenwich N d. zenith and is parallel to the horizon 2060: What is the relative bearing of an object broad on the starboard quarter?
N a. 045° N b. 090° Y c. 135° N d. 225° 2084: You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should __________.
Y a. hold your position and not attempt to enter the lock N b. approach the lock slowly under full control N c. proceed at normal speed to enter the lock N d. None of the above 2101: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.
Y a. Broadcast Notice to Mariners N b. Light List Vol. V N c. U.S. Coast Pilot N d. All of the above 2130: You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________.
N a. the light is characterized as alternately flashing N b. the lighthouse has lost power and has switched to emergency lighting N c. it is the identifying light characteristic of the lighthouse Y d. you have entered an area of shoal water or other hazard 2143: What lights would you see on the Illinois water way when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
Y a. Red over amber (yellow) N b. Green over amber (yellow) N c. Red over Green N d. Green over Red 2181: Diagram Number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at D if the lock walls and piers are not awash?
Y a. One red light N b. Two red lights N c. Three red lights N d. No lights 2254: A rock and sand structure extending from the bank of the river toward the channel is known as a __________.
Y a. wingdam N b. towhead N c. cutoff N d. landwall 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2409: You are approaching the first of two drawbridges that span a narrow channel. The second drawbridge is close to the first. Which signals should you sound?
N a. Sound the request-for-opening signal for the first bridge only, who will notify the second bridge of your approach N b. Sound the request-for-opening signal twice in succession to indicate you must pass through both bridges N c. Sound the request-for-opening signal, pause for about 10 seconds, then sound two prolonged blasts. Y d. Sound the request-for-opening signal and, after the bridge acknowledges it, sound the request-for-opening signal for the second bridge. 2430: You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
N a. 197° Y b. 247° N c. 315° N d. 335° 2540: The distance between any two meridians measured along a parallel of latitude and expressed in miles is the __________.
N a. difference in longitude N b. mid-longitude Y c. departure N d. meridian angle 2592: A deadhead is a(n) __________.
Y a. tree or log awash in a nearly vertical position N b. crew member who refuses to work N c. upstream end of a land wall N d. buoy that is adrift 2658: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45°N and latitude 49°N?
N a. 33.1 inches N b. 33.3 inches Y c. 33.6 inches N d. 33.9 inches 2725: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. estimated position N b. dead-reckoning position N c. running fix Y d. fix 2819: The time interval between successive wave crests is called __________.
Y a. wave period N b. wavelength N c. frequency N d. significant wave height 2828: The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.
N a. daily lapse reading Y b. diurnal variation of pressure N c. pressure tendency N d. synoptic pressure 2923: You should plot your dead reckoning position __________.
N a. from every estimated position Y b. from every fix or running fix N c. every three minutes in pilotage waters N d. only in pilotage waters 2932: If the main channel under a bridge is marked with lights of the lateral system the adjacent bridge piers should be marked with __________.
N a. occulting white lights Y b. fixed yellow lights N c. fixed white lights N d. flashing yellow lights 2947: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
N a. fix N b. dead-reckoning position Y c. running fix N d. estimated position 2969: A red triangular daymark marks __________.
N a. the centerline of a navigable channel Y b. the starboard side of a channel N c. a prominent object of navigational interest that has no lateral significance N d. an area of a channel where passing another vessel is permitted 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 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer 3065: Raster-scan chart data is __________.
N a. the only format recognized by IMO/IHO N b. organized into many separate files N c. composed of files that are smaller than vector files Y d. a digitized "picture" of a chart in one format and one layer 3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.
N a. International Maritime Organization Y b. International Hydrographic Organization N c. NASA N d. US Coast Guard