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.
113: The type of transmission used in Loran-C is a __________.
N a. single pulse N b. wide pulse Y c. multipulse N d. narrow pulse 120: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. If you maneuver at 13 knots to avoid the hurricane, what could be the maximum CPA?
Y a. 72 miles N b. 78 miles N c. 83 miles N d. 89 miles 148: When possible, a DR plot should always be started from where?
N a. Any position Y b. A known position N c. An assumed position N d. None of the above 198: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the time to intercept if you make 9 knots?
N a. 7h 44m N b. 7h 12m Y c. 6h 43m N d. 6h 08m 251: A mid-channel buoy, if lighted, will show a __________.
N a. fixed red light Y b. Morse (A) white light N c. green light N d. flashing red light 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 347: The illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates rain? (D042NG )
Y a. N N b. M N c. I N d. G 408: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port?
N a. 174°T N b. 176°T Y c. 178°T N d. 180°T 418: In most cases, the direction of the apparent wind lies between the bow and __________.
Y a. the direction of the true wind N b. true north N c. the beam on the windward side N d. the beam on the lee side 465: When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.
N a. hs to the visible horizon Y b. hs to the sensible horizon N c. hs to the celestial horizon N d. Ho to the celestial horizon 522: All straight lines represent great circle tracks on a chart based on a(n) __________.
N a. Mercator projection N b. polyconic projection N c. orthographic projection Y d. gnomonic projection 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 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 599: Magnetic compass deviation __________.
N a. varies depending upon the bearing used Y b. is the angular difference between magnetic north and compass north N c. is published on the compass rose on most nautical charts N d. is the angular difference between geographic and magnetic meridians 686: The pressure gradient between the horse latitudes and doldrums runs __________.
N a. east to west Y b. north to south N c. northeast to southwest N d. northwest to southeast 735: The period of the Earth's revolution from perihelion to perihelion is the __________.
N a. astronomical year Y b. anomalistic year N c. solar year N d. sidereal year 747: The movement of water away from the shore or downstream is called a(n) __________.
N a. reversing current Y b. ebb current N c. flood current N d. slack current 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 814: Steam smoke will occur when __________.
Y a. extremely cold air from shore passes over warmer water N b. warm dry air from shore passes over cooler water N c. cold ocean water evaporates into warm air N d. cool rain passes through a warm air mass 843: The line which connects the points of zero magnetic dip is __________.
N a. an agonic line Y b. the magnetic equator N c. a magnetic meridian N d. All of the above 891: Under the IALA-A Buoyage System, a buoy indicating the preferred channel is to port would have __________.
N a. an even number N b. an odd number N c. a pillar shape Y d. horizontal bands 971: You are in British waters on course 090°T when you sight a flashing white light with a characteristic of VQ(9)10s. You immediately change course to 030°T. After one hour, you sight another flashing white light with the characteristic of VQ. You must pass well __________.
N a. south of this buoy N b. west of this buoy Y c. north of this buoy N d. east of this buoy 1041: You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white flashing light showing a group of two flashes. The buoy indicates you __________.
N a. must pass south of the buoy N b. must pass north of the buoy Y c. should pass well clear on either side of the buoy N d. must pass the buoy close to starboard 1152: When using GPS without Selective Availability, you may expect your horizontal accuracy to be better than __________.
N a. 3 meters Y b. 20 meters N c. 100 meters N d. 200 meters 1230: Weather forecast messages are usually __________.
N a. given only to TV stations N b. transmitted only by commercial broadcast stations Y c. broadcast in plain language N d. broadcast immediately on VHF Channel 16 and 2182 kHz 1273: Deviation changes with a change in __________.
N a. latitude Y b. heading N c. longitude N d. sea conditions 1275: How is variation indicated on a small-scale nautical chart?
N a. Magnetic compass table N b. Magnetic meridians Y c. Isogonic lines N d. Variation is not indicated on small-scale nautical charts. 1347: What will be the velocity of the tidal current south of Doubling Point, ME, at 1357 EST (ZD +5) on 3 April 1983?
N a. 0.9 knot N b. 1.3 knots Y c. 2.0 knots N d. 2.6 knots 1437: Determine the time after 0300 CST (ZD +6) when the velocity of the tidal current will be 0.5 knot on 16 April 1983, at Port Arthur Canal Entrance, TX.
N a. 0436 Y b. 0507 N c. 0538 N d. 0554 1448: Spring tides occur when the __________.
N a. Moon is in its first quarter or third quarter phase N b. Sun and Moon are in quadrature N c. Moon's declination is maximum and opposite to that of the Sun Y d. Moon is new or full 1488: What defines a great circle?
N a. A curved line drawn on a Mercator Chart N b. A course line that inscribes a loxodromic curve Y c. The shortest distance between any two points on the earth N d. The smallest circle that can be drawn on the face of a sphere 1507: When you are steering on a pair of range lights and find the upper light is above the lower light you should __________.
N a. come right N b. come left N c. wait until the lights are no longer in a vertical line Y d. continue on the present course 1512: You are plotting a running fix. The LOP to be run forward is an arc from a radar range, what technique should be used?
N a. The arc should be converted into a straight line using offsets and then run forward. N b. An arc should never be run forward. Y c. The position of the object observed should be advanced to the new time and a new arc swung using the radius of the old arc. N d. The distance between LOP's should be added to the radar range and a new arc swung. 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 1581: Shown are the symbols used on radio facsimile weather charts. The symbol indicated at letter "I" represents __________. (D042NG )
N a. rain showers Y b. thunderstorms N c. snow storms N d. sand storms 1588: The letter D in illustration D006NG represents the __________.
Y a. geometrical horizon N b. geoidal horizon N c. celestial horizon N d. visible horizon 1619: Sextant A reads __________. (D043NG )
Y a. 29°42.7' N b. 29°45.7' N c. 29°51.8' N d. 30°47.2' 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 1784: If your vessel were proceeding down river (descending), a green square marker with a green reflector border on the right bank would be a __________.
N a. mile board N b. dredging mark Y c. passing daymark N d. crossing daymark 1836: At evening stars, the first stars that should be observed are those with an azimuth in what quadrant?
N a. Southern N b. Western N c. Northern Y d. Eastern 2024: In the North Sea area, you sight a buoy with a quick light showing 3 flashes every 10 seconds. Which topmark in illustration D030NG would be fitted to this buoy under the IALA Buoyage Systems? (D030NG )
N a. A N b. B N c. C Y d. D 2068: 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 )
Y a. One red light N b. Two red lights N c. Three red lights N d. One amber light 2286: Which light signal indicates that you have permission to enter a lock on the Ohio River?
N a. Steady red N b. Flashing amber N c. Steady green Y d. Flashing green 2290: Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________.
Y a. deviation N b. variation N c. local attraction N d. All of the above 2428: If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by __________.
Y a. green can buoys N b. red can buoys N c. green nun buoys N d. red nun buoys 2502: The major factor that causes the color difference between a red star (Betelgeuse) and a blue star (Rigel) is __________.
Y a. its surface temperature N b. the elevation above the horizon N c. the mass of the star N d. the contrast to nearby stars 2705: Information about the direction and velocity of rotary tidal currents is found in the __________.
Y a. Tidal Current Tables N b. Mariner's Guide N c. Tide Tables N d. Nautical Almanac 2722: The paths of intended travel between three or more points is the __________.
N a. course Y b. track N c. bearing N d. course over the ground 2776: For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored?
N a. Personal correction Y b. Instrument correction N c. Phase N d. Dip correction 2816: The length of a wave is the length __________.
N a. of the wave's crest N b. of the wave's trough N c. measured from crest to trough Y d. measured from crest to crest 2844: The signal from a ramark will show on the PPI as a __________.
N a. coded signal on the same bearing and at a greater range then the transponder N b. circle surrounding the transponder Y c. radial line from the transponder to the center of the PPI N d. dashed circle at the same range as the transponder 2908: A daymark used to indicate the port side of the channel when approaching from seaward is indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 3002: The diurnal variation of pressure is most noticeable __________.
N a. above the polar circles N b. in a low pressure area N c. during periods of low temperatures Y d. in the doldrums 3024: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN ?
N a. C 018°T, Sp 6 knots N b. C 079°T, Sp 24 knots N c. C 101°T, Sp 7 knots Y d. C 349°T, Sp 25 knots 3035: A major advantage of the NAVTEX system when compared to other systems is that __________.
N a. the information can be received on an ordinary FM radio Y b. warnings are printed out for reading when convenient N c. broadcasts are at scheduled times N d. a low frequency band is used for long distance transmission 3092: ECDIS must be able to perform all of the following EXCEPT __________.
N a. determine true bearing and distance between two geographical points Y b. determine magnetic compass deviation N c. transform a local datum to the WGS-'84 datum N d. convert "graphical coordinates" to "display coordinates" 3095: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 6 hours Y b. 12 hours N c. 18 hours N d. 24 hours 3105: An automatic identification system (AIS) transponder transmits and receives information broadcasts on _____?
N a. 10 cm, S-band radar N b. 3 cm, X-band radar N c. UHF L-band Y d. VHF maritime band 3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. N b. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. Y c. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels, aircraft and shore stations within the area. N d. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area.