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.
71: A preferred-channel buoy may be __________.
Y a. lettered N b. spherical N c. showing a white light N d. All of the above 109: While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown bearing 053°T. What action should you take? (D021NG )
N a. Alter course to 053° and leave the buoy close aboard on either side N b. Maintain course Y c. Alter course to 060° and ensure that the true bearings decreases N d. Alter course to port to rapidly open the bearing to the right 142: Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals?
N a. Approach charts Y b. General charts N c. Sailing charts N d. Coastal charts 186: In the doldrums you will NOT have __________.
N a. high relative humidity N b. frequent showers and thunderstorms Y c. steep pressure gradients N d. frequent calms 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. 355: During the month of October the Sun's declination is __________.
N a. north and increasing N b. north and decreasing Y c. south and increasing N d. south and decreasing 366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.
N a. left, slightly behind him Y b. right, slightly behind him N c. left, slightly in front of him N d. right, slightly in front of him 401: You are steaming in a westerly direction along the Gulf Coast. You see ahead of you a lighted buoy showing a red isophase light. Which action should you take?
Y a. Alter course to port and leave the buoy to starboard. N b. Alter course to starboard and leave the buoy to port. N c. Alter course and leave the buoy near by on either side. N d. Alter course and pass the buoy well-off on either side. 409: On November 1st the zone time is 1700 EST (ZD +5) in LONG 75°W. What is the corresponding zone time and date in LONG 135°E?
Y a. 0700, November 2nd N b. 0700, November 1st N c. 2200, November 1st N d. 2200, October 31st 421: Daylight savings time is a form of zone time that adopts the time __________.
N a. one zone to the west Y b. one zone to the east N c. two zones to the west N d. two zones to the east 439: If a weather bulletin shows the center of a low pressure system to be 100 miles due east of you, what winds can you expect in the Southern Hemisphere?
Y a. South-southwesterly N b. North-northwesterly N c. South-southeasterly N d. North-northeasterly 471: Yellow lights may appear on __________.
Y a. special purpose buoys N b. vertically-striped buoys N c. horizontally-banded buoys N d. spherical buoys 579: Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.
N a. permanent waves N b. tidal waves Y c. tropical waves N d. tropical storms 583: The radar control used to reduce sea return at close ranges is the __________.
N a. gain control Y b. sensitivity time control N c. fast time constant N d. pulse length control 613: Your radar indicates a target; however, there is no visible object at the point indicated. A large mountain, approximately 50 miles away on the same bearing as the target, is breaking the horizon. You should suspect the radar target is caused by __________.
N a. a submerged submarine Y b. ducting N c. sub-refraction N d. ionospheric skip waves 704: What is TRUE of the history display of a target's past positions on an ARPA?
N a. It provides a graphic display to emphasize which vessel is on a collision course. Y b. In the true presentation, it provides a quick visual check to determine if a vessel has changed course. N c. The display is one of the primary inputs and must be in use when using the trial maneuver capability. N d. It provides a graphic display of a target vessel's relative course, speed, and CPA. 706: A steep barometric gradient indicates __________.
N a. calms N b. light winds Y c. strong winds N d. precipitation 866: Anticyclones are usually characterized by __________.
Y a. dry, fair weather N b. high winds and cloudiness N c. gustiness and continuous precipitation N d. overcast skies 878: At 0600 ZT on 31 January, your position is LAT 00°49'S, LONG 84°27'E. 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. 30243, 90008, 30848 N b. 31003, 99049, 38427 Y c. 31003, 99008, 30844 N d. 31063, 99049, 58427 903: Eight points of a compass are equal to how many degrees?
N a. 45 Y b. 90 N c. 180 N d. 360 1006: An air mass is termed "warm" if __________.
N a. it is above 70°F Y b. the ground over which it moves is cooler than the air N c. it originated in a high pressure area N d. it originated in a low pressure area 1146: What is true about a front?
N a. A front is a boundary between two air masses. N b. There are abrupt temperature differences on opposite sides of a front. N c. The pressure tendencies are different on opposite sides of a front. Y d. All of the above 1185: An orange and white buoy with a rectangle on it displays __________.
N a. directions N b. distances N c. locations Y d. All of the above 1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.
N a. passage of a warm front Y b. passage of a cold front N c. winds shifting counterclockwise in the Northern Hemisphere N d. stationary high pressure systems 1355: The parallax of the Moon is greatest when the Moon is __________.
N a. in the zenith at perigee N b. on the horizon at apogee N c. at its maximum altitude at apogee Y d. on the horizon at perigee 1363: True heading differs from magnetic heading by __________.
N a. deviation Y b. variation N c. compass error N d. northerly error 1411: The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.
N a. under existing visibility conditions N b. under perfect visibility Y c. with ten miles visibility N d. with fifteen miles visibility 1419: The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________.
Y a. nonmagnetic N b. weatherproof N c. corrosion resistant N d. capable of being permanently affixed to the vessel 1443: At the master gyrocompass, the compass card is attached to the __________.
N a. spider element Y b. sensitive element N c. link arm N d. pickup transformer 1480: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom N c. The vertical distance from the surface of the water to the ocean floor Y d. The vertical distance from the tidal datum to the level of the water at any time 1490: In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.
N a. quick flashing light N b. long flashing light Y c. composite group flashing (2 + 1) light N d. group flashing 1521: To avoid error you should read the scale of an aneroid barometer with your eye placed __________.
N a. to the right of the pointer N b. to the left of the pointer Y c. directly in front of the pointer N d. slightly above the meniscus 1545: The change in the length of day becomes greater as latitude increases because of the __________.
N a. inclination of the diurnal circle to the equator N b. decreasing distance between the terrestrial meridians Y c. increased obliquity of the celestial sphere N d. changing distance between the earth and the sun 1663: What is the primary source of the earth's weather?
N a. The oceans N b. The moon Y c. The sun N d. The solar system 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1710: A gale is characterized by a wind speed of __________.
N a. 10 to 20 knots Y b. 34 to 47 knots N c. 48 to 63 knots N d. 64 to 83 knots 1736: Which statement is FALSE concerning the dangerous semicircle of a hurricane?
N a. The actual wind speed is increased by the forward movement of the storm along its track N b. the direction of the wind and the sea might carry a vessel directly into the storm's path N c. The seas are higher Y d. The rain is heavier 1791: The accuracy of an azimuth circle can be checked by __________.
N a. sighting a terrestrial range in line and comparing the observed bearing against the charted bearing N b. aligning the relative bearing markings so that 000° is on the lubber's line and the line of sight passes over the center of the compass N c. ensuring that the alignment marks on the inner face of the circle are in line with those on the repeater on relative bearings of 000° and 090° Y d. comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant 1850: A vessel heading WNW is on a course of __________.
N a. 270.0° Y b. 292.5° N c. 315.0° N d. 337.5° 1916: The prime vertical is the reference point from which the angle of which type of observation is measured?
N a. Sextant angle N b. Azimuth Y c. Amplitude N d. Local apparent noon 2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?
N a. Quadrantal spheres N b. Heeling magnets Y c. Fore-and-aft magnets N d. Athwartships magnets 2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?
N a. Quadrantal spheres N b. Heeling magnets Y c. Fore-and-aft magnets N d. Athwartships magnets 2210: A dead reckoning (DR) plot __________.
Y a. ignores the effect of surface currents N b. is most useful when in sight of land N c. must be plotted using magnetic courses N d. may be started at an assumed position 2236: Which is TRUE of a downbound power-driven vessel, when meeting an upbound vessel on the Western Rivers?
N a. She has the right of way. N b. She shall propose the manner of passage. N c. She shall initiate the maneuvering signals. Y d. All of the above 2271: What is the definition of height of tide?
N a. The vertical distance from the surface of the water to the ocean floor Y b. The vertical distance from the tidal datum to the level of the water at any time N c. The vertical difference between a datum plane and the ocean bottom N d. The vertical difference between the heights of low and high water 2316: Elongation becomes zero at __________.
N a. opposition N b. west quadrature N c. apogee Y d. inferior conjunction 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2360: What U.S. agency is responsible for NAVAREA warnings?
N a. Coast Guard N b. National Oceanic and Atmospheric Administration N c. National Ocean Service Y d. National Geospatial-Intelligence Agency 2364: The immediate surroundings of what constellation contain the most first magnitude stars?
N a. Libra N b. Cassiopeia N c. Pegasus Y d. Orion 2386: The path that the Sun appears to take among the stars is the __________.
N a. zodiac N b. Tropic of Cancer in the Northern Hemisphere Y c. ecliptic N d. line of apsides 2387: You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you navigate __________.
N a. about 5 miles east of Cape Canaveral N b. about 15 miles east of Daytona N c. along the 50-fathom curve Y d. about 20 miles east of Jupiter Inlet 2422: The dimmest stars that could be reasonably used for navigational purposes are of what magnitude?
N a. First Y b. Third N c. Sixth N d. Tenth 2711: Information about currents on the Pacific Coast of the U. S. are found in the __________.
Y a. Tidal Current Tables N b. Nautical Almanac N c. Tide Tables N d. Ocean Current Tables 2839: Privately maintained aids to navigation included in the Light List __________.
N a. are painted white and must use a white light if lighted N b. must be conspicuously marked by a signboard with the words "PRIVATE AID" Y c. must conform to the standards of the U.S. Aids to Navigation System N d. are not permitted in or along first-class waterways and may be authorized for second- and third-class waterways 2842: The draw span of a floating drawbridge may be marked with __________.
N a. two white lights Y b. a yellow diamond N c. flashing blue lights N d. three red lights on each side of the draw 2859: The buoy indicated by the letter C in illustration D044NG is a __________.
N a. nun N b. can N c. spar Y d. pillar 2924: You take a bearing of 264° of a lighthouse. What bearing of another object would give the best fix?
N a. 289° Y b. 350v N c. 081° N d. 120° 2929: On 29 June 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 114°16.9'. The height of eye is 36 feet and the index error is 2.0' on the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?
Y a. 66°31.6' N b. 66°31.0' N c. 66°28.8' N d. 66°26.0' 3021: Which information is found in the chart title?
N a. Chart number Y b. Chart sounding datum N c. Revision and edition date N d. Variation information 3124: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
Y a. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position, course, speed and other safety related information to all those with similar equipment in the area. N b. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position, course, speed and other safety related information to all those with similar equipment in the area. N c. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position, course, speed and other safety related information to all those with similar equipment in the area. N d. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position, course, speed and other safety related information to all those with similar equipment within the area.