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.
21: Which buoy is NOT numbered?
N a. Green can buoy Y b. Preferred-channel buoy N c. Red lighted buoy N d. Green gong buoy 38: When navigating a vessel, you __________.
N a. can always rely on a buoy to be on station N b. can always rely on a buoy to show proper light characteristics N c. should assume a wreck buoy is directly over the wreck Y d. should never rely on a floating aid to maintain its exact position 96: A weather forecast states that the wind will commence veering. In the Northern Hemisphere this indicates that the wind will __________.
Y a. shift in a clockwise manner N b. shift in a counterclockwise manner N c. continue blowing from the same direction N d. increase in velocity 108: A position that is obtained by using two or more intersecting lines of position taken at nearly the same time, is a(n) __________.
N a. dead-reckoning position N b. estimated position Y c. fix N d. running fix 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 255: On March 17, at 0500 zone time, you cross the 180th meridian steaming eastward to west longitude. What is your local time?
N a. You are in -12 time zone. N b. It is 1700, March 18. Y c. It is 0500, March 16. N d. It is 0500, March 18. 311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.
N a. the vessel's starboard side Y b. the vessel's port side N c. either side close aboard N d. either side well clear 348: When using a radar in an unstabilized mode, fixes are determined most easily from __________.
N a. center bearings N b. tangent bearings N c. objects that are close aboard Y d. ranges 352: Which chart projection would be most suitable for marine surveying?
N a. Gnomonic N b. Lambert conformal N c. Mercator Y d. Polyconic 389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.
Y a. navigable semicircle N b. dangerous semicircle N c. low pressure area N d. eye of the storm 416: A ship is on course 195° at a speed of 15 knots. The apparent wind is from 40° on the port bow, speed 30 knots. The direction and speed of the true wind are __________.
N a. 068°T, 30 knots Y b. 127°T, 21 knots N c. 263°T, 42 knots N d. 292°T, 42 knots 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 434: The purpose of the "set" hand on an aneroid barometer is to __________.
N a. adjust the barometer Y b. indicate any change in the reading of the barometer N c. provide a correction for height above sea level N d. provide a correction for temperature changes 555: The letter D shown represents the __________. (D006NG )
N a. geoidal horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 590: On 16 January 1981, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is -10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?
N a. 4°10.2' N b. 4°14.3' Y c. 4°17.0' N d. 4°24.1' 601: White and orange buoys, if lighted, show which color light?
Y a. White N b. Orange N c. Red N d. Alternating yellow and white 617: You are bound for the Chelsea docks in the Hudson River. The Captain wants to arrive at the docks at the first slack water on 28 July 1983. You are keeping daylight saving time. What time should you be at the docks?
Y a. 0215 N b. 0530 N c. 0811 N d. 0911 724: Which statement concerning GPS is TRUE?
N a. It cannot be used in all parts of the world. N b. There are 12 functioning GPS satellites at present. Y c. It may be suspended without warning. N d. Two position lines are used to give a 2D fix. 732: What publication has information on the climate, distances, navigation regulations, outstanding landmarks, channels and anchorages of Long Island Sound?
N a. Light List Y b. Coast Pilot N c. Sailing Directions N d. Pilot Chart 775: A sidereal day is shorter than a solar day. This difference is due to __________.
N a. irregularities in the daily rotational rate of the Sun N b. the space motion of the solar system N c. the precession of the equinoxes Y d. the use of different reference points 793: The permanent magnetism of a vessel may change in strength due to __________.
N a. a collision with another vessel N b. being moored on a constant heading for a long period of time N c. being struck by lightning Y d. All of the above 854: The appearance of nimbostratus clouds in the immediate vicinity of a ship at sea would be accompanied by which of the following conditions?
Y a. Rain and poor visibility N b. Dropping barometric pressure and backing wind in the Northern Hemisphere N c. High winds and rising sea N d. Severe thunderstorms 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 947: The cold ocean current which meets the warm Gulf Stream between latitudes 40° and 43°N to form the "cold wall" is called the __________.
N a. North Cape Current Y b. Labrador Current N c. Greenland Current N d. North Atlantic Current 972: In which source could you find the number of a chart for a certain geographic area?
N a. Chart No. 1 Y b. Catalog of Charts N c. American Practical Navigator N d. U.S. Coast Guard Light List 977: In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.
Y a. Central North Atlantic Ocean N b. Caribbean Sea N c. Western North Pacific Ocean N d. area off the west coast of South America 1040: An occluded front is usually caused by a __________.
N a. cold front becoming stationary N b. warm front becoming stationary Y c. cold front overtaking a warm front N d. warm front dissipating 1068: A vessel sighting a northern right whale dead ahead should __________.
N a. maintain course and speed Y b. alter course to give a wide clearance N c. report the whale's position to the Canadian Coast Guard N d. All of the above 1086: When crossing a front isobars tend to __________.
Y a. change from smooth curves within the air mass to sharp bends at the front N b. change from sharp bends within the air mass to smooth curves at the front N c. pass smoothly across the front with no change N d. become closer together at the front and pass through in straight lines 1111: Black double-cone topmarks are the most important feature, by day, of cardinal marks. Which of the four topmarks shown indicates the best navigable water lies to the west of the buoy? (D030NG )
N a. A N b. B Y c. C N d. D 1220: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
N a. the position of underwater cables N b. a hazard to navigation N c. the port side of the channel Y d. safe water 1389: A boundary between two air masses is a(n) __________.
N a. lapse rate N b. isobar Y c. front N d. continent 1398: Nimbostratus clouds are indicated by what number in illustration D039NG? (D039NG )
Y a. 8 N b. 6 N c. 4 N d. 1 1439: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "G" represents a __________. (D042NG )
N a. weather boundary N b. thunderstorm N c. wide spread sandstorm Y d. severe, line squall 1517: When determining compass error by an azimuth of Polaris, you enter the Nautical Almanac with the __________.
N a. GHA Aries Y b. LHA Aries N c. LHA Polaris N d. GHA Polaris 1557: A Doppler log in the volume reverberation mode indicates __________.
N a. speed being made good Y b. speed through the water N c. the set of the current N d. the depth of the water 1595: The Light List indicates that a light has a nominal range of 8 miles and is 48 feet(14.6 meters) high. If the visibility is 6 miles and your height of eye is 35 feet(10.7 meters), at what approximate distance will you sight the light?
N a. 15.0 nm N b. 12.4 nm N c. 8.0 nm Y d. 5.9 nm 1646: Which picture in illustration D034NG shows a flashing light? (D034NG )
N a. A N b. B Y c. C N d. D 1651: From which type of cloud can a tornado or waterspout develop?
N a. Nimbostratus N b. Altostratus Y c. Cumulonimbus N d. Cirrus 1737: You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.
N a. observing whether the wind is veering or backing N b. plotting two or more recent storm positions from weather bulletins Y c. Both A and B N d. Neither A nor B 1751: A tsunami is caused by a(n) __________.
N a. tidal wave N b. storm surge caused by a hurricane or tropical storm Y c. earthquake on the ocean's floor N d. tornado 1795: Which weather element cannot be measured accurately while on board a moving vessel?
N a. Relative humidity Y b. Cloud base height N c. Temperature N d. Atmospheric pressure 1874: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red N c. Alternating yellow and white Y d. White 1914: In the horizon system of coordinates what is equivalent to longitude on the Earth?
N a. Altitude Y b. Azimuth angle N c. Horizon N d. Zenith distance 1940: The diameter of the Sun and Moon as seen from the Earth varies slightly but averages about __________.
N a. 1' N b. 52' Y c. 32' N d. 15.5' 2128: 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 B if the lock walls and piers are not awash?
Y a. Three red lights N b. Two red lights N c. One red lights N d. No lights 2238: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment?
N a. If the quadrantal spheres are all of the way out replace them with larger spheres. N b. If the quadrantal spheres are all of the way in replace them with larger spheres. Y c. If the quadrantal spheres are all of the way in, move the spheres out. N d. If the quadrantal spheres are all of the way out, move the spheres in. 2239: A flashing green light displayed at a single lock means that the lock is __________.
Y a. ready for entrance N b. ready for entrance, but gates cannot be closed completely N c. being made ready for entrance N d. not ready for entrance 2261: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. running fix N b. fix N c. dead-reckoning position Y d. estimated position 2351: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. running fix N b. probable position N c. fix Y d. dead-reckoning position 2506: Which is TRUE on the Western Rivers when a vessel downbound with a following current is meeting an upbound vessel?
Y a. She has the right of way only if she is a power-driven vessel. N b. She has the right of way only if she has a tow. N c. She does not have the right of way, since the other vessel is not crossing the river. N d. She must wait for a whistle signal from the upbound vessel. 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 2814: In low latitudes the range of the diurnal variation of pressure is up to __________.
N a. 0.5 millibar Y b. 3.0 millibars N c. 6.0 millibars N d. 10.0 millibars 2828: The daily recurring pattern of pressure changes most noticeable in low latitudes is the __________.
N a. daily lapse reading Y b. diurnal variation of pressure N c. pressure tendency N d. synoptic pressure 2914: A daymark with red and green bands, with red uppermost, will have the shape indicated by which letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2981: The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________.
Y a. NAVTEX N b. HYDROLANT/HYDROPAC N c. NAVAREA N d. SAFESEA 3037: The letter H in illustration D006NG represents the __________.
Y a. visible horizon N b. celestial horizon N c. geoidal horizon N d. refractive horizon 3056: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix Y b. dead-reckoning position N c. running fix N d. probable position 3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.
N a. International Maritime Organization Y b. International Hydrographic Organization N c. NASA N d. US Coast Guard 3104: In general, on how many radio channels will an automatic identification system (AIS) operate?
Y a. 3 N b. 5 N c. 7 N d. 9