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.
81: A buoy with a composite group-flashing light indicates a(n) __________.
Y a. bifurcation N b. fish net area N c. anchorage area N d. dredging area 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 286° Y b. 254° N c. 106° N d. 016° 215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?
N a. 1148 N b. 1200 Y c. 1212 N d. It cannot be determined from the information given. 358: What will be the set of the rotary current at Nantucket Shoals at 1245 (ZD +5) 14 January 1983?
N a. 015° Y b. 125° N c. 162° N d. 225° 380: Prevailing winds between 30°N and 60°N latitude are from the __________.
N a. east Y b. west N c. north N d. south 424: For an accurate barometer check, you would __________.
N a. check it with a barometer on another vessel N b. take readings from several barometers and average them N c. check it with the barometer at the ship chandlery Y d. check it against radio or National Weather Service reports of the immediate vicinity 444: A sylphon cell is a part of a __________.
N a. maximum thermometer Y b. barograph N c. thermograph N d. hygrometer 446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.
N a. northwest, west, and south Y b. southwest, south, and southeast N c. north, northwest, and east N d. west, northwest, and north 467: At what time after 1400 EST (ZD +5), on 4 January 1983, will the height of the tide at Port Wentworth, GA, be 3.0 feet?
N a. 1612 N b. 1630 Y c. 1653 N d. 1718 486: Tropical cyclones do not form within 5° of the Equator because __________.
N a. there are no fronts in that area N b. it is too hot N c. it is too humid Y d. of negligible Coriolis force 492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth?
N a. Lambert conformal Y b. Oblique gnomonic N c. Mercator N d. Transverse conic 563: Your radar has a beam width of 2°. The radar gyro bearing of the right tangent of an island is 316°. The gyro error is 1°E. Which true bearing should be plotted on the chart?
N a. 313° N b. 314° Y c. 316° N d. 317° 587: Your vessel has a draft of 34 feet. On 8 October 1983 you wish to pass over an obstruction near Jaffrey Point, NH, that has a charted depth of 31 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 0900 DST (ZD +4) that this passage can be made?
N a. 0920 Y b. 1029 N c. 1120 N d. 1159 600: The dangerous semicircle of a typhoon in the Southern Hemisphere is that area __________.
N a. measured from due south clockwise 180° N b. measured from due south counterclockwise 180° Y c. to the left of the storm's track N d. ahead of the typhoon measured from the storm's track to 90° on each side 626: What indicates the arrival of a hurricane within 24 to 36 hours?
N a. The normal swell becoming lower and from a steady direction N b. Long bands of nimbostratus clouds radiating from a point over the horizon N c. The barometer drops 2 millibars between 1000 and 1600 Y d. Unusually good weather with above average pressures followed by a slow fall of 4 millibars in six hours 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 703: Which statement concerning the operation of radar in fog is TRUE?
N a. Radar ranges are less accurate in fog. N b. Navigation buoys will always show up on radar. N c. A sandy beach will show up clearer on radar than a rocky cliff. Y d. Small wooden boats may not show up on radar. 793: The permanent magnetism of a vessel may change in strength due to __________.
N a. a collision with another vessel N b. being moored on a constant heading for a long period of time N c. being struck by lightning Y d. All of the above 825: While steering a course of 150°T, you wish to observe the Sun for a speed check. What would the azimuth have to be?
N a. 000°T N b. 090°T Y c. 150°T N d. 240°T 848: It is unlawful to approach within how many yards of a northern right whale?
N a. 200 N b. 300 N c. 400 Y d. 500 880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
N a. 60° Y b. 90° N c. 45° N d. 30° 893: One point of a compass is equal to how many degrees?
N a. 7.5 Y b. 11.25 N c. 17.5 N d. 22.5 941: While preparing to enter a Brazilian port, you see ahead a red and green horizontally-striped buoy. The upper band is red. What action should you take?
N a. Alter course to leave the buoy to port. Y 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. 1018: An aneroid barometer reading should be corrected for differences in __________.
Y a. elevation N b. temperature N c. wind speed N d. latitude 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// 1046: The probability of a sudden wind may be foretold by __________.
N a. a partly cloudy sky N b. an overcast sky Y c. a fast approaching line of dark clouds N d. the formation of cumulus clouds in the sky 1051: Under the IALA Buoyage Systems, a cardinal mark may NOT be used to __________.
N a. indicate that the deepest water in an area is on the named side of the mark N b. indicate the safe side on which to pass a danger N c. draw attention to a feature in the channel such as a bend, junction, bifurcation, or end of a shoal Y d. indicate the port and starboard sides of well-defined channels 1063: When adjusting a magnetic compass using the fore-and-aft permanent magnets, you should __________.
N a. use the magnets one at a time, putting one in one side and then one on the opposite side, one step higher. N b. use the magnets in pairs, starting at the top, with trays at the highest point of travel Y c. use the magnets in pairs, from the bottom up, with the trays at the lowest point of travel N d. fill all the trays with magnets, then remove them one-by-one until the deviation is removed 1093: The Flinders bar on a magnetic compass compensates for the __________.
Y a. induced magnetism in vertical soft iron N b. induced magnetism in horizontal soft iron N c. permanent magnetism in ship's steel N d. vessel's inclination from the vertical 1196: In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________.
N a. warm front N b. tropical cyclone N c. anticyclone Y d. cold front 1299: What will be the time (ZD +5) of the second high tide at Weymouth Fore River Bridge, MA, on 12 November 1983?
N a. 1639 N b. 1643 N c. 1647 Y d. 1650 1329: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?
N a. 1m 54s fast N b. 2s fast Y c. -2s N d. +2s 1356: The first indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus (thunderclouds) building up Y b. high cirrus clouds gradually changing to cirrostratus and then to altostratus N c. fog caused by the warm air passing over the cooler water N d. low dark clouds accompanied by intermittent rain 1379: The lubber's line on a magnetic compass indicates __________.
N a. compass north Y b. the direction of the vessel's head N c. magnetic north N d. a relative bearing taken with an azimuth circle 1386: The FIRST indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus clouds building up N b. low dark clouds with intermittent rain N c. fog caused by the warm air passing over the cooler water Y d. high clouds gradually followed by lower thicker clouds 1408: An occluded front is caused by a(n) __________.
N a. low pressure area N b. high pressure area N c. area of calm air Y d. cold front overtaking a warm front 1424: Except for N-S courses, and E-W courses on the equator, a great circle track between two points, when compared to a rhumb line track between the same two points, will __________.
N a. always be nearer to the equator Y b. always be nearer to the elevated pole N c. be nearer to the pole in the Northern Hemisphere and nearer to the equator in the Southern Hemisphere N d. be nearer to the pole or the equator depending on the latitudes of the arrival and departure positions 1444: Stratocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 4 Y c. 6 N d. 7 1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.
N a. NNW N b. WSW Y c. ESE N d. SSW 1711: An instrument that indicates wind direction is known as a(n) __________.
Y a. weather vane, wind vane or wind sock N b. hydrometer N c. hygrometer N d. sling psychrometer 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 1830: A vessel heading NNW is on a course of __________.
N a. 274.5° N b. 292.0° N c. 315.5° Y d. 337.5° 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 2004: The velocity of the wind, its steady direction, and the amount of time it has blown determines a wind driven current's __________.
N a. temperature N b. density N c. deflection Y d. speed 2102: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?
N a. 21214 Y b. 11314 N c. 14313 N d. 14114 2131: The white lights in a vertical line on a multiple-span bridge indicate __________.
Y a. the main channel N b. the draw span is inoperable N c. the river is obstructed under that span N d. scaffolding under the span is reducing the vertical clearance 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 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2279: Antares is found in what constellation?
Y a. Scorpio N b. Corvus N c. Libra N d. Corona Borealis 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 2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken?
N a. Use the fore-and-aft magnets and adjust the compass until it reads 358°. Y b. Use the athwartships magnets and adjust the compass until it reads 358°. N c. Use the fore-and-aft magnets and adjust the compass until it reads 000°. N d. Use the quadrantal spheres and adjust the compass until it reads 000°. 2532: You must construct a Mercator plotting sheet on a piece of paper measuring 28" by 32". The area includes latitude 32°S to 39°S and longitude 005°E to 003°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
Y a. 3.38 inches N b. 3.62 inches N c. 3.79 inches N d. 3.95 inches 2570: A plane that cuts the Earth's surface and passes through the poles will always form __________.
N a. the equator N b. a loxodromic curve N c. a small circle Y d. a meridian 2678: A vessel crossing a river on the Western Rivers, must keep out of the way of a power-driven vessel __________.
N a. descending the river with a tow N b. ascending the river with a tow N c. ascending the river without a tow Y d. All of the above 2938: You take a bearing of 176° of a lighthouse. What bearing of another object would give the best fix?
N a. 000° N b. 021° N c. 189° Y d. 272° 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 3120: The short text messaging feature of the automatic identification system (AIS) allows for messages of up to___.
N a. 56 characters N b. 64 characters N c. 128 characters Y d. 158 characters 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. 3130: When may the automatic identification system (AIS) be switched off?
N a. At anytime as long as it is properly logged. Y b. At the Master's professional judgment. N c. Only when the vessel is at anchor or in port. N d. Under no circumstance.