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.
76: In the Northern Hemisphere, a wind that shifts counterclockwise is a __________.
N a. veering wind Y b. backing wind N c. reverse wind N d. chinook wind 95: The difference in local time between an observer on 114°W and one on 119°W is __________.
N a. 1.25 minutes N b. 5 minutes Y c. 20 minutes N d. 75 minutes 99: 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. smoother seas and warmer water Y b. steeper waves, closer together N c. long swells N d. cirrus clouds 117: Mean high water is the average height of __________.
N a. the higher high waters N b. the lower high waters N c. the lower of the two daily tides Y d. all high waters 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 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 326: You are steaming west in the North Atlantic in an extratropical cyclonic storm, and the wind is dead ahead. According to the law of Buys Ballot, the center of low pressure lies to the __________.
Y a. north N b. south N c. east N d. west 352: Which chart projection would be most suitable for marine surveying?
N a. Gnomonic N b. Lambert conformal N c. Mercator Y d. Polyconic 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' 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?
N a. 22.4 feet (6.8 meters) Y b. 23.4 feet (7.2 meters) N c. 24.9 feet (7.6 meters) N d. 25.7 feet (7.8 meters) 445: The values of the Greenwich hour angle and declination, tabulated in all almanacs, are for the __________.
N a. upper limb of a celestial body N b. lower limb of a celestial body Y c. centers of the various celestial bodies N d. lower limb of the Sun and Moon; center of the stars and planets 493: The picture shown represents the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 is not detected due to the shadow effect of the headland. N b. The small island is not detected due to the effect of beam width. Y c. A tangent bearing of the headland to the south-southeast should be corrected by adding one-half of the beam width. N d. Ship No. 2 is not detected due to the reflective mass of the background mountain overpowering the ship's reflective signals. 500: The National Geospatial-Intelligence Agency (formerly the National Imagery and Mapping Agency) would produce a chart of the coast of __________.
N a. Alaska Y b. Canada N c. Puerto Rico N d. Hawaii 555: The letter D shown represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 561: Buoys which mark dredging areas are painted __________.
N a. black Y b. yellow N c. green N d. red 629: The rise and fall of the ocean's surface due to a distant storm is known as __________.
N a. sea N b. waves N c. fetch Y d. swell 877: Cold water flowing southward through the western part of the Bering Strait between Alaska and Siberia is joined by water circulating counterclockwise in the Bering Sea to form the __________.
N a. Alaska Current N b. Subarctic Current N c. Kuroshio Current Y d. Oyashio Current 928: The position labeled "D" was plotted because __________. (D051NG )
Y a. a dead reckoning position is plotted for each course change N b. a dead reckoning position is plotted within 30 minutes of a running fix N c. the vessel's speed changed at 1125 N d. All of the above 970: You are preparing a weather report form, WS Form B-80. The sky is overcast, and the anemometer indicates that the apparent wind is from 144° relative at 8 knots. You are on course 162°T at 15 knots. How should you encode group Nddff? (D041NG )
N a. 91521 Y b. 83322 N c. 81408 N d. 01615 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 1112: Considering the general circulation of the atmosphere, the wind system between latitudes 30°N and 60°N is commonly called the __________.
Y a. prevailing westerlies N b. horse latitudes N c. trade winds N d. subpolar low pressure belts 1151: Buoys are marked with reflective material to assist in their detection by searchlight. Which statement is TRUE?
N a. A safe-water buoy will display red and white vertical stripes of reflective material. N b. All reflective material is white because it is the most visible at night. N c. A special-purpose mark will display either red or green reflective material to agree with its shape. Y d. A preferred-channel buoy displays either red or green reflective material to agree with the top band of color. 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 1258: You should log all barometer readings taken at sea __________.
N a. regularly N b. at least once during each watch N c. more often under changeable weather conditions Y d. All of the above 1269: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?
N a. 20.1 miles N b. 16.0 miles Y c. 12.8 miles N d. 7.6 miles 1279: For 3 November 1983, at 0830 EST (ZD +5) at Catskill, NY, what is the predicted height of tide?
N a. +0.1 foot (+0.0 m) Y b. -0.6 foot (-0.2 m) N c. +0.9 foot (+0.3 m) N d. -1.3 feet (-0.4 m) 1350: You are running parallel to the coast and plotting running fixes using bearings of the same object. You are making more speed than assumed for the running fix. In relation to the position indicated by the fix you will be __________.
N a. closer to the coast Y b. farther from the coast N c. on the track line ahead of the fix N d. on the track line behind the fix 1406: What will act to dissipate fog?
N a. Upwelling cold water N b. Advection of warm air over a colder surface N c. Rain that is warmer than air Y d. Downslope motion of an air mass along a coast 1462: Altocumulus clouds are indicated by which number? (D039NG )
N a. 1 N b. 3 N c. 4 Y d. 5 1570: The navigational triangle uses parts of two systems of coordinates, one of which is the horizon system and the other is the __________.
N a. terrestrial system N b. astronautical system Y c. celestial equator system N d. ecliptic system 1598: A slow, gradual fall of the barometer indicates approaching __________.
N a. gale force winds within 12 hours N b. blizzard conditions Y c. deteriorating or unsettled weather N d. heavy, wind driven rain 1612: The strongest winds and heaviest rains in a hurricane are found in the __________.
N a. outer bands N b. eye Y c. cloud walls N d. spiral rainbands 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 1705: Two well-developed low pressure areas may be separated by a __________.
N a. trough of higher pressure N b. hill of higher pressure Y c. ridge of higher pressure N d. valley of higher pressure 1717: A tropical storm is a tropical cyclone that generates winds of __________.
N a. between 20 and 33 knots Y b. between 34 and 63 knots N c. over 63 knots N d. None of the above 1756: Where would you expect to find climatological and meteorological tables for the Gulf Coast area?
N a. In the publication entitled Radio Aids to Navigation Y b. In the back of Coast Pilot #5 N c. In any Coast Pilot volume N d. Only at the National Weather Service office 1782: You are on course 027°T and take a relative bearing to a lighthouse of 220°. What is the true bearing to the lighthouse?
N a. 113° N b. 193° Y c. 247° N d. 279° 1844: What is the relative bearing of an object sighted dead ahead?
N a. 180° N b. 090° N c. 015° Y d. 000° 1905: In order to insure that the racon signal is visible on your 3 cm radar, the __________.
N a. 10 cm radar should be placed on standby or turned off N b. gain control should be turned to maximum N c. radar should be stabilized, head up Y d. rain clutter control should be off but, if necessary, may be on low 1920: Because the actual center of some planets may differ from the observed center, the navigator applies a correction known as the __________.
Y a. phase correction N b. refraction correction N c. semidiameter correction N d. augmentation correction 2040: A vessel heading NNE is on a course of __________.
Y a. 022.5° N b. 045.0° N c. 067.5° N d. 090.0° 2182: Diagram Number D037NG 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?
N a. No lights Y b. One red light N c. Two red lights N d. Three red lights 2216: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 317°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres out. Y b. Move the quadrantal spheres in. N c. If the spheres are in as far as possible replace them with smaller spheres. N d. If the spheres are out as far as possible replace them with smaller spheres. 2396: Perihelion is the point where the Sun __________.
Y a. is nearest to the Earth N b. is farthest from the Earth N c. is on the opposite side of the Earth from the Moon N d. and Moon and Earth are in line 2439: Which statement about the time diagram in illustration D008NG is TRUE? (D008NG )
Y a. You are in east longitude. N b. The Sun is setting for you. N c. Your date is different from the Greenwich date. N d. The GHA is approximately 160°. 2486: What is the equivalent of 23 min. 20 sec. in arc units?
N a. 16°40' N b. 12°32' N c. 9°28' Y d. 5°50' 2530: The distance between any two meridians measured along a parallel of latitude __________.
N a. increases in north latitude and decreases in south latitude N b. decreases as DLO increases N c. increases with increased latitude Y d. decreases with increased latitude 2542: Which magnetic compass corrector(s) CANNOT be set while the vessel is on a heading of magnetic north or magnetic south?
N a. Athwartships magnets N b. Heeling magnet Y c. Flinders bar N d. All of the above can be set on magnetic north or magnetic south headings. 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 2702: You must draw a plotting sheet covering latitudes 46°N to 48°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 2 7/8 inches, what is the distance between latitude 46°N and 48°N?
Y a. 8.4 inches N b. 8.1 inches N c. 7.9 inches N d. 7.7 inches 2724: Which condition indicates that your radar needs maintenance?
Y a. Serrated range rings N b. Indirect echoes N c. Multiple echoes N d. Blind sector 2752: A daymark used to indicate the safe water in a channel will have which of the shapes shown? (D045NG )
N a. A N b. B Y c. C N d. D 2999: When entering a channel from seaward, the numbers on buoys __________.
N a. are the same as their Light List number N b. are marked in 6 inch figures with retroreflective material Y c. increase with the even numbers to starboard N d. decrease with the odd numbers to starboard 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 3073: ECDIS must give an alarm for which of the following cases?
Y a. If the ship is going to reach a critical point on the planned route N b. When the speed of a dangerous target exceeds a set limit N c. If the ship's ETA has changed beyond the set limit N d. All of the above 3089: As a licensed Merchant Marine Officer you are expected to __________.
N a. obtain a weather forecast before setting out from port N b. listen to weather forecasts on the radio while enroute N c. understand all broadcast weather warning information Y d. All of the above 3093: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 4 hours N b. 6 hours Y c. 12 hours N d. 24 hours 3116: With respect to automatic identification systems (AIS), which information is expected to be broadcast every 1 to 10 seconds?
N a. Name of ship Y b. Ship's heading N c. IMO number N d. Vessel's draft