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.
103: In Loran-C the high accuracy of atomic time and frequency controls allows each station to operate __________.
N a. at higher frequencies Y b. on schedule, independently N c. at 1,975 kHz N d. in a multiplex phase 141: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042°T, 105 miles from you. What is the time to intercept if you make 10 knots?
N a. 12h 30m N b. 12h 44m Y c. 12h 58m N d. 13h 22m 241: A spherical buoy may be __________.
N a. numbered Y b. lettered N c. green N d. red 267: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )
N a. Alter course to the right to 309°T or more to bring the range in line. Y b. Alter course to the left until the range closes, then steer to the left of 306°T. N c. Alter course to the left to close the range, then alter course to 309°T. N d. Maintain course as it is normal for the range to open as you get close. 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 282: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic describes the light?
N a. It is visible 10 miles. N b. Its distinguishing number is "19M". N c. It has a radar reflector. Y d. None of the above 415: If the Sun's observed altitude is 54°30', what is the zenith distance?
Y a. 35°30' N b. 45°30' N c. 12°30' N d. 14°30' 539: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
Y a. 324°T N b. 306°T N c. 299°T N d. 276°T 556: In a tropical cyclone in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise would be __________.
Y a. in the navigable semicircle N b. in the dangerous semicircle N c. directly in the path of the center N d. ahead of the storm 581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.
N a. red or green to conform with the other lateral aids N b. red and green horizontally-striped N c. solid yellow Y d. white with orange markings 598: A great circle crosses the equator at 141°E. It will also cross the equator at what other longitude?
N a. 180°E N b. 41°E N c. 141°W Y d. 39°W 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 623: An indirect radar echo is caused by a reflection of the main lobe of the radar beam off the observer's vessel. Which of the following is NOT a characteristic of indirect echoes?
N a. Their bearing is almost constant, even when the true bearing of the contact changes appreciably. Y b. They always appear on a bearing of 90°From the true bearing of the contact. N c. The indirect echoes usually appear in shadow sectors. N d. When plotted, their movements are usually abnormal. 651: Which topmark shown identifies an isolated danger? (D023NG )
N a. A Y b. B N c. C N d. D 689: What is the index error of sextant C? (D050NG )
Y a. 0'20" on the arc N b. 1'00" on the arc N c. 2'00" on the arc N d. 5'10" on the arc 823: The greatest directive force is exerted on the magnetic compass when the __________.
N a. needles are nearly in line with the meridian N b. vessel is near the magnetic poles N c. variation is near zero Y d. vessel is near the magnetic equator 837: The Brazil Current flows in which general direction?
N a. Northwesterly Y b. Southwesterly N c. Southeasterly N d. Northerly 847: On a voyage from Halifax, N.S., to Dakar, West Africa, the Canary Current will __________.
N a. set the vessel to the left Y b. set the vessel to the right N c. offer resistance in the form of a head current N d. furnish additional thrust in the form of a fair or following current 883: When changing from a compass course to a true course you should apply __________.
N a. variation N b. deviation Y c. variation and deviation N d. a correction for the direction of current set 888: Recurvature of a hurricane's track usually results in the forward speed __________.
Y a. increasing N b. decreasing N c. remaining the same N d. varying during the day 1012: General information about the location, characteristics, facilities, and services for U.S. and foreign ports may be obtained from which publication?
Y a. World Port Index N b. Sailing Directions N c. Distances Between Ports N d. Coast Pilot 1081: On a voyage along the coast of France, you sight a buoy with the top marks as shown. You are required to steer __________. (D026NG )
N a. west of the buoy N b. east of the buoy Y c. south of the buoy N d. north of the buoy 1096: With the passage of an occluded front the temperature __________.
N a. rises rapidly N b. remains about the same N c. drops rapidly Y d. depends on whether warm type or cold type occlusion 1096: With the passage of an occluded front the temperature __________.
N a. rises rapidly N b. remains about the same N c. drops rapidly Y d. depends on whether warm type or cold type occlusion 1201: What is NOT true concerning color sectors of lights?
Y a. Color sectors are expressed in degrees from the light toward the vessel. N b. Color sectors may indicate dangerous waters. N c. Color sectors may indicate the best water across a shoal. N d. Color sectors may indicate a turning point in a channel. 1241: Which picture shows a fixed and flashing light? (D034NG )
Y a. A N b. B N c. C N d. D 1260: On 26 February 1983, at 1750 EST (ZD +5) what will be the predicted height of tide at New Haven (city dock), CT?
N a. -.3 foot (-0.1 meter) Y b. -.6 foot (-0.2 meter) N c. 1.3 feet (0.4 meter) N d. 1.6 feet (0.5 meter) 1310: An urgent marine storm warning message would be broadcast on __________.
N a. 2670 KHz N b. 156.80 MHz (VHF-FM Ch. 16) Y c. 157.10 MHz (VHF-FM Ch. 22A) N d. None of the above 1310: An urgent marine storm warning message would be broadcast on __________.
N a. 2670 KHz N b. 156.80 MHz (VHF-FM Ch. 16) Y c. 157.10 MHz (VHF-FM Ch. 22A) N d. None of the above 1321: A lighthouse can be identified by its __________.
N a. painted color N b. light color and phase characteristic N c. type of structure Y d. All of the above 1401: The maximum distance at which a light may be seen under existing visibility conditions is called __________.
N a. nominal range Y b. luminous range N c. charted range N d. geographic range 1502: You are running parallel to the coast and take a running fix using bearings of the same object. If you are making less speed than used for the running fix, in relation to the position indicated by the fix, you will be __________.
Y a. closer to the coast N b. farther from the coast N c. on the track line ahead of the fix N d. on the track line behind the fix 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1702: In a cyclone the lowest pressure is found in the __________.
Y a. center N b. outer edge N c. warm front N d. cold front 1729: The first cloud formations you can use to indicate the bearing of the center of a hurricane or tropical storm are __________.
Y a. the point of convergence of the cirrus clouds N b. the direction of movement of thunderstorms on radar N c. the darkest point of the clouds in the "bar" of the storm N d. the point of origin of the altostratus clouds 1767: Which statement describes the prevailing wind direction in mid-winter in the Gulf Coast area?
Y a. 30% to 40% of mid-winter winds are from a northern quadrant. N b. 40% to 50% of mid-winter winds are from a southern quadrant. N c. the winds are variable in speed, but strongest in March. N d. None of the above 1787: What indicates that a tropical cyclone may be within 500 to 1,000 miles of your position?
Y a. A pumping of the barometer up and down a few millibars N b. A sudden wind shift from southwest to northwest followed by steadily increasing winds N c. The normal swell pattern becoming confused, with the length of the swell increasing N d. An overcast sky with steadily increasing rain from nimbostratus clouds 1829: 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 E in the illustration? (D036NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No light 2158: Permanent magnetism is caused by __________.
N a. operation of electrical equipment and generators on board ship Y b. the earth's magnetic field affecting the ship's hard iron during construction N c. the horizontal component of the earth's magnetic field acting on the horizontal soft iron N d. the vertical component of the earth's magnetic field acting on the vertical soft iron 2232: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. Which action should be taken to remove this error during compass adjustment?
N a. If the red ends are to starboard you should raise the athwartships tray. Y b. If the red ends are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends are to port, and the athwartships tray is at the top, you should reverse the magnets. N d. If the red ends are to port, and the athwartships tray is at the top, you should lower the tray. 2299: What condition exists at apogee?
N a. The Earth is closest to the Sun. N b. The Moon is farthest from the Sun. Y c. The Earth is farthest from the Moon. N d. The Moon is between the Earth and the Sun. 2317: The Light List indicates that a light has a nominal range of 13 miles and is 36 feet high (11.0 meters). If the visibility is 7.0 miles and your height of eye is 25 feet (7.6 meters), at what approximate distance will you sight the light?
Y a. 10.0 miles N b. 12.9 miles N c. 14.2 miles N d. 17.0 miles 2349: The summer solstice is the point where the Sun is at __________.
Y a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations N d. 0° declination going to southerly declinations 2426: You are in charge of a power-driven vessel crossing a river on the Western Rivers. You must keep out of the way of __________.
N a. a sail vessel descending the river N b. a power-driven vessel ascending the river N c. a vessel restricted in its ability to maneuver crossing the river Y d. All of the above 2436: Aphelion is the point where the Sun __________.
N a. and Moon and Earth form a right angle N b. and Moon and Earth are in line N c. crosses the celestial equator Y d. is farthest from the Earth 2466: On the Western Rivers, a vessel crossing a river must __________.
N a. only keep out of the way of a power-driven vessel descending the river N b. keep out of the way of any vessel descending the river Y c. keep out of the way of a power-driven vessel ascending or descending the river N d. keep out of the way of any vessel ascending or descending the river 2490: A vertex of the navigational triangle is NOT located at the __________.
N a. elevated pole N b. celestial body N c. zenith Y d. coaltitude 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 2610: A line on the Earth parallel to the equator is a __________.
N a. gnomonic curve Y b. small circle N c. meridian N d. great circle 2709: Under the IALA-B Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which of the topmarks shown? (D046NG )
N a. A N b. B N c. C Y d. D 2714: A current moving across a lock entrance toward the river or toward the dam is called a(n) __________.
N a. cutoff Y b. outdraft N c. lockwash N d. springpool 2730: When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________.
Y a. with bow out, stern in N b. with bow in, stern out N c. parallel to the dock, as close in as possible N d. parallel to the dock, as far out as possible 2832: The Light List indicates that a dayboard is a type MR. You should __________.
Y a. leave it on either side N b. look for the other dayboard forming the range N c. look for an all red daymark N d. check to enter the correct channel at this junction daymark 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 2910: 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° N b. 45° Y c. 90° N d. 30° 2978: Where do you find the semidiameter correction to be used to correct sextant observations of the stars?
N a. It is included in the altitude corrections inside the front cover of the Nautical Almanac. N b. Table 25 in Bowditch contains the correction. N c. A correction of -0.5' should be applied to all star sights. Y d. No semidiameter correction is used. 2994: You take a bearing of 313° and 076° of two objects. Which bearing of a third object will give the best fix?
Y a. 014° N b. 133° N c. 255° N d. 339° 3088: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
N a. an alarm if engine speed is suddenly increased Y b. an alarm if a new position has not been calculated within the last two seconds N c. an indication of a change in the number of satellites N d. None of the above. 3103: In general, on how many radio channels will an automatic identification system (AIS) operate?
N a. 1 Y b. 3 N c. 4 N d. 12 3117: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
Y a. Time stamp N b. IMO number N c. Type of vessel N d. Vessel's maximum displacement