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.
9: When displayed under a single-span fixed bridge, red lights indicate __________.
Y a. the channel boundaries N b. that vessels must stop N c. the bridge is about to open N d. that traffic is approaching from the other side 124: An electronic depth finder operates on the principle that __________.
N a. radio signals reflect from a solid surface Y b. sound waves travel at a constant speed through water N c. radar signals travel at a constant speed through water N d. pressure increases with depth 237: Neap tides occur when the __________.
Y a. Moon is in its first quarter and third quarter phases N b. Sun and Moon are on opposite sides of the Earth N c. Moon's declination is maximum and opposite to that of the Sun N d. Sun and Moon are in conjunction 266: The horse latitudes are characterized by __________.
Y a. weak pressure gradients and light, variable winds N b. the formation of typhoons or hurricanes in certain seasons N c. steady winds in one direction for six months followed by wind reversal for the next six months N d. steady winds generally from the southeast in the Southern Hemisphere 270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )
N a. drop the anchor immediately as the range lights mark an area free of obstructions N b. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor Y c. ensure your ship will NOT block the channel or obstruct the range while at anchor N d. NOT drop the anchor until the lights are in line 270: You are entering port and have been instructed to anchor, as your berth is not yet available. You are on a SW'ly heading, preparing to drop anchor, when you observe the range lights as shown on your starboard beam. You should __________. (D047NG )
N a. drop the anchor immediately as the range lights mark an area free of obstructions N b. drop the anchor immediately as a change in the position of the range lights will be an indication of dragging anchor Y c. ensure your ship will NOT block the channel or obstruct the range while at anchor N d. NOT drop the anchor until the lights are in line 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 325: What is the longitude of the geographical position of a body whose Greenwich hour angle is 210°30'?
N a. 30°30'E N b. 59°30'W N c. 120°30'W Y d. 149°30'E 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 479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 114° N b. 158° N c. 295° N d. 340° 646: You have determined that you are in the right semicircle of a tropical cyclone in the Northern Hemisphere. What action should you take to avoid the storm?
N a. Place the wind on the starboard quarter and hold that course. N b. Place the wind on the port quarter and hold that course. N c. Place the wind on the port bow and hold that course. Y d. Place the wind on the starboard bow and hold that course. 648: Weather systems in the middle latitudes generally travel from __________.
N a. north to south Y b. west to east N c. east to west N d. None of the above 672: You are planning to enter an unfamiliar U.S. port. Which publication provides information about channel depths, dangers, obstructions, anchorages, and marine facilities available in that port?
N a. American Practical Navigator N b. Notice to Mariners Y c. Coast Pilot N d. Sailing Directions 697: The set of the current is the __________.
N a. speed of the current at a particular time N b. maximum speed of the current N c. direction from which the current flows Y d. direction in which the current flows 721: Under the IALA Buoyage System, a red and white vertically-striped buoy would NOT indicate __________.
N a. a landfall Y b. the extreme end of an islet N c. a mid-channel N d. a center line 745: Retrograde motion is the __________.
N a. movement of the points of intersection of the planes of the ecliptic and the equator Y b. apparent westerly motion of a planet with respect to stars N c. movement of a superior planet in its orbit about the Sun N d. movement of the celestial north pole in an elliptical pattern in space 1029: Which would be the subject of a NAVAREA warning?
N a. A drifting buoy sighted in mid-ocean N b. Extinguishment of Wolf Trap Light located inside Chesapeake Bay N c. All military exercises on the high seas involving four or more vessels Y d. Off-air times of radio beacons when scheduled for routine maintenance 1180: You are on course 238°T. To check the course of your vessel you should observe a celestial body on which bearing?
N a. 180° N b. 238° Y c. 328° N d. 090° 1189: Concerning a celestial observation, the azimuth angle is measured from the principal vertical circle to the ____________ .
N a. Greenwich celestial meridian N b. hour circle of the body N c. local celestial meridian Y d. vertical circle of the body 1211: Red sectors of navigation lights warn mariners of __________.
N a. floating debris N b. heavily trafficked areas N c. recently sunken vessels Y d. shoals or nearby land 1252: Port side daymarks may be __________.
Y a. numbered N b. octagonal N c. black and white N d. of any shape 1263: The compass deviation changes as the vessel changes __________.
N a. geographical position N b. speed Y c. heading N d. longitude 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 1372: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
N a. cirrus clouds N b. long swells N c. smoother seas and warmer water Y d. steeper waves, closer together 1410: A white buoy marked with an orange rectangle indicates __________.
N a. a fish net area Y b. general information N c. an anchorage N d. mid-channel 1429: A celestial body will cross the prime vertical circle when the latitude is numerically __________.
Y a. greater than the declination and both are of the same name N b. less than the declination and both are of the same name N c. greater than the declination and both are of contrary name N d. less than the declination and both are of contrary name 1616: Which picture in illustration D034NG shows a Morse (A) light? (D034NG )
N a. A N b. B N c. C Y d. D 1641: The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.
N a. cirrus cloud N b. cumulus cloud N c. cumulonimbus cloud Y d. nimbostratus cloud 1673: Information about currents on the Pacific Coast of the U. S. is found in the __________.
N a. Nautical Almanac Y b. Tidal Current Tables N c. Ocean Current Tables N d. Tide Tables 1680: A weather front exists when __________.
N a. air masses of the same temperature meet Y b. air masses of different temperatures meet N c. many clouds create a differential in air density N d. two lows are separated by a ridge of higher pressure 1713: When a tornado moves over the water from land it is called a __________.
N a. tornado Y b. waterspout N c. hurricane N d. cyclone 1754: The dumping of refuse in a lock is permitted __________.
N a. when approved by the lockmaster N b. when locking downbound Y c. at no time N d. during high water only 1761: Chart legends which indicate a conspicuous landmark are printed in __________.
N a. italics N b. underlined letters Y c. capital letters N d. boldfaced print 1766: You are approaching a lock and see a flashing amber light located on the lock wall. You should __________.
N a. stand clear of the lock entrance Y b. approach the lock under full control N c. enter the lock as quickly as possible N d. hang off your tow on the lock wall 1818: In order to utilize the capacity of a lock to its maximum, pleasure craft are locked through with all of the following EXCEPT __________.
N a. coal barges Y b. oil barges N c. sand barges N d. cement barges 1826: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter D in the illustration? (D036NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No light 1869: The illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 2050: The point where the vertical rise or fall of tide has stopped is referred to as __________.
N a. slack water N b. the rip tide Y c. the stand of the tide N d. the reverse of the tide 2061: Fog is likely to occur when there is little difference between the dew point and the __________.
N a. relative humidity Y b. air temperature N c. barometric pressure N d. absolute humidity 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 2159: Induced magnetism is found in __________.
N a. hard iron Y b. soft iron N c. vertical iron only N d. horizontal iron only 2176: The illustration 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? (D037NG )
N a. Three red lights N b. Two red lights Y c. One red light N d. One amber light 2246: The speed of an ocean current is dependent on __________.
Y a. the density of the water N b. the air temperature N c. the presence of a high pressure area near it N d. underwater soil conditions 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 2348: Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on the __________.
N a. north side of the mark Y b. west side of the mark N c. east side of the mark N d. south side of the mark 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 2452: The permanent magnetism of a vessel may change in strength due to __________.
N a. the nature of the cargo being carried N b. changes in heading Y c. major structural repair N d. All of the above 2569: The mean sun used to measure time moves __________.
N a. along the ecliptic at 15° per hour N b. along the celestial equator at 15° per day N c. along the ecliptic at 15° per day Y d. along the celestial equator at 15° per hour 2651: Low pressure disturbances which travel along the intertropical convergence zone are called __________.
Y a. tropical waves N b. tropical disturbances N c. permanent waves N d. tidal waves 2664: The Light List shows a lighted aid to navigation on the right bank. This means that the light can be seen on the port side of a vessel __________.
N a. crossing the river N b. descending the river Y c. ascending the river N d. proceeding towards sea 2672: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
Y a. continue on the present course N b. come left N c. come right N d. wait until the lights are no longer in a vertical line 2672: When you are steering on a pair of range lights and find the upper light is in line above the lower light, you should __________.
Y a. continue on the present course N b. come left N c. come right N d. wait until the lights are no longer in a vertical line 2696: You must draw a plotting sheet covering latitudes 52°S to 56°S and longitudes 179°W to 175°E. If the distance between latitude 52°S to 56°S is 24 inches, what is the distance between the meridians of 1° of longitude?
N a. 3.2 inches Y b. 3.5 inches N c. 4.0 inches N d. 4.2 inches 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?
N a. Strong, gusting winds from the NW with thundershowers N b. Light winds from the northeast with clear skies N c. A "blue norther" Y d. Southerly winds with steady rain; fog or overcast 2894: Fetch is the __________.
N a. distance a wave travels between formation and decay Y b. stretch of water over which a wave-forming wind blows N c. time in seconds required for two crests to pass a given point N d. measurement of a wave's steepness 3009: "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding __________.
N a. northerly on the Atlantic Coast N b. easterly on the Gulf Coast Y c. northerly on the Pacific Coast N d. None of the above 3084: An ECDIS is required to display which information?
Y a. Soundings N b. Waypoints N c. Meteorological data N d. Radar targets 3084: An ECDIS is required to display which information?
Y a. Soundings N b. Waypoints N c. Meteorological data N d. Radar targets 3090: NOAA VHF weather reports are continuously broadcast on VHF channels WX-1, WX-2 and WX-3 on a frequency of __________.
N a. 156.8, 157.1, 162.55 MHz N b. 162.55, 162.00, 171.5 KHz Y c. 162.55, 162.40, 162.475 MHz N d. 2182, 2638, 2670 KHz