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.
121: A safe water mark may be __________.
N a. vertically striped N b. spherical N c. showing a white light Y d. All of the above 158: Discounting slip, if your vessel is turning RPM for 10 knots and making good a speed of 10 knots, the current could be __________.
N a. with you at 10 knots N b. against you at 10 knots Y c. slack N d. with you at 2 knots 166: On the pole side of the high pressure belt in each hemisphere, the pressure diminishes. The winds along these gradients are diverted by the Earth's rotation toward the east and are known as the __________.
N a. geostrophic winds N b. doldrums N c. horse latitudes Y d. prevailing westerlies 179: You are proceeding up a channel at night. It is marked by a range which bears 185°T. You steady up on a compass course of 180° with the range in line dead ahead. This indicates that you(r) __________.
N a. must come right to get on the range N b. course is in error Y c. compass has some easterly error N d. are being affected by a southerly current 379: The steady current circling the globe at about 60°S is the __________.
N a. Prevailing Westerly N b. Sub-Polar Flow Y c. West Wind Drift N d. Humboldt Current 420: 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 )
Y a. Alter course to the left until the range closes then steer to the left of 306°T. N b. Maintain course as it is normal for the range to open as you get close. N c. Alter course to the left to close the range, then alter course to 309°T. N d. Alter course to the right to 309°T or more to bring the range in line. 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 488: A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?
N a. 13°E Y b. 87°E N c. 177°E N d. 177°W 499: Which of the symbols shown represents an occluded front? (D018NG )
N a. A N b. B N c. C Y d. D 518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.
Y a. selective availability is set to zero N b. the satellites are all below 15° in elevation N c. your vessel is equipped with a Doppler receiver N d. the horizontal dilution of precision is high 579: Low pressure disturbances, which travel along the intertropical convergence zone, are called __________.
N a. permanent waves N b. tidal waves Y c. tropical waves N d. tropical storms 696: The diurnal pressure variation is most noticeable in the __________.
N a. polar regions N b. horse latitudes N c. roaring forties Y d. doldrums 712: Information about the pilotage available at Miami harbor may best be obtained from which publication?
N a. World Port Index N b. Sailing Directions N c. Pilot Chart Y d. United States Coast Pilot 756: What is a common unit of measure for atmospheric pressure?
N a. centimeters Y b. Inches N c. Degrees N d. Feet 835: When taking stars, those bodies to the east and west will __________.
Y a. change altitude rapidly N b. change altitude slowly N c. remain in an almost fixed position N d. appear to be moving in the plane of the horizon 869: Tropical storms and hurricanes are most likely to form in the Southern hemisphere during __________.
Y a. January through March N b. April through May N c. June through August N d. September through November 893: One point of a compass is equal to how many degrees?
N a. 7.5 Y b. 11.25 N c. 17.5 N d. 22.5 969: The population of northern right whales, an endangered species, numbers approximately __________.
Y a. 300 N b. 5000 N c. 100,000 N d. 1,000,000 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 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 1071: A cardinal mark showing an uninterrupted quick-flashing white light indicates the deepest water in the area is on the __________.
Y a. north side of the mark N b. west side of the mark N c. east side of the mark N d. south side of the mark 1103: The vertical component of the Earth's magnetic field causes induced magnetism in vertical soft iron. This changes with latitude. What corrects for this coefficient of the deviation?
Y a. The Flinders bar N b. The heeling magnet N c. Quadrantal soft iron spheres N d. Bar magnets in the binnacle 1120: You are on course 042°T. To check the course of your vessel you should observe a celestial body on which bearing?
N a. 090° Y b. 132° N c. 180° N d. 222° 1190: Which type of cloud is indicated by the number 2? (D039NG )
N a. Cumulus Y b. Cirrostratus N c. Stratocumulus N d. Altostratus 1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.
N a. passage of a warm front Y b. passage of a cold front N c. winds shifting counterclockwise in the Northern Hemisphere N d. stationary high pressure systems 1246: What weather change accompanies the passage of a cold front in the Northern Hemisphere?
N a. Wind shift from northeast clockwise to southwest N b. Steady dropping of barometric pressure N c. Steady precipitation, gradually increasing in intensity Y d. A line of cumulonimbus clouds 1281: The time required for a lighted aid to complete a full cycle of light changes is listed in the Light List as the __________.
N a. set N b. frequency Y c. period N d. function 1336: On the approach of a warm front, barometric pressure usually __________.
Y a. falls N b. is steady N c. is uncertain N d. rises 1342: An occluded front on a weather map is colored __________.
N a. blue line Y b. purple line N c. dashed blue line N d. alternate red and blue line 1446: When compared to air temperature, which factor is most useful in predicting fog?
N a. Vapor pressure Y b. Dew point N c. Barometric pressure N d. Absolute humidity 1446: When compared to air temperature, which factor is most useful in predicting fog?
N a. Vapor pressure Y b. Dew point N c. Barometric pressure N d. Absolute humidity 1479: A microbarograph is a precision instrument that provides a __________.
N a. charted record of atmospheric temperature over time Y b. charted record of atmospheric pressure over time N c. graphic record of combustible gases measured in an atmosphere N d. graphic record of vapor pressure from a flammable/combustible liquid 1498: A true bearing of a charted object, when plotted on a chart, will establish a __________.
N a. fix Y b. line of position N c. relative bearing N d. range 1508: A line of position is __________.
N a. a line connecting two charted objects Y b. a line on some point of which the vessel may be presumed to be located N c. the position of your vessel N d. not used in a running fix 1639: Sextant D reads __________. (D043NG )
N a. 30°47.5' N b. 29°47.5' Y c. 29°42.5' N d. 29°41.6' 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 1703: In the Northern Hemisphere, when the wind at your location is northerly, the low pressure center causing the wind is located to your __________.
N a. NNW N b. WSW Y c. ESE N d. SSW 1711: An instrument that indicates wind direction is known as a(n) __________.
Y a. weather vane, wind vane or wind sock N b. hydrometer N c. hygrometer N d. sling psychrometer 1759: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic north or magnetic south?
N a. Quadrantal spheres Y b. Heeling magnets N c. Flinders bar N d. Fore-and-aft magnets 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 1820: Information on the operating times and characteristics of foreign radio beacons can be found in which publication?
Y a. List of Lights N b. Coast Pilot N c. Sailing Directions N d. List of Radio beacons 1962: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
Y a. the port side of the channel N b. a sharp turn in the channel to the right N c. a junction with the preferred channel to the left N d. a wreck to be left on the vessel's starboard side 2042: At morning stars, the last stars that should be observed are those with an azimuth in which quadrant?
N a. Eastern N b. Southern Y c. Western N d. Northern 2196: 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?
Y a. If the quadrantal spheres are all the way out, replace them with smaller spheres. N b. If the quadrantal spheres are all the way in, replace them with larger spheres. N c. If the quadrantal spheres are all of the way out, move the spheres in. N d. If the quadrantal spheres are all the way out, replace them with larger spheres. 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. 2288: A mean sun is used as the reference for solar time for three reasons. Which reason is NOT a cause for use of a mean sun?
N a. The motion of the apparent sun is along the ecliptic. Y b. Measurement of time is along the celestial equator. N c. The speed of the Earth's revolution is not constant. N d. There are variations in the Earth's rotational speed. 2304: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in longitude N b. Diurnal libration Y c. Vertical libration N d. Libration in latitude 2362: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 004°. Which action should be taken?
N a. Use the Flinders bar and adjust the compass until it reads 002°. N b. Use the fore-and-aft magnets and adjust the compass until it reads 000°. Y c. Use the athwartships magnets and adjust the compass until it reads 002°. N d. Use the athwartships magnets and adjust the compass until it reads 000°. 2394: A vessel is heading magnetic east and its magnetic compass indicates a heading of 093°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are aft, and the fore-and-aft tray is at the top, you should remove some magnets. N b. If the red ends of the magnet are aft, and the fore-and-aft tray is at the bottom, you should reverse the magnets. Y c. If the red ends of the magnets are aft you should raise the fore-and-aft tray. N d. If the blue ends of the magnets are forward you should remove some magnets from the fore-and-aft tray. 2597: 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. fix N b. running fix Y c. estimated position N d. dead-reckoning position 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2628: A drawbridge may use visual signals to acknowledge a vessel's request to open the draw. Which signal indicates that the draw will NOT be opened immediately?
N a. A flashing amber light Y b. A fixed red light N c. A white flag raised and lowered vertically N d. A flashing white light 2646: During daylight savings time the meridian used for determining the time is located farther __________.
Y a. east N b. west N c. east in west longitude and west in east longitude N d. west in west longitude and east in east longitude 2688: The 10-cm radar as compared to a 3-cm radar of similar specifications will __________.
N a. be more suitable for river and harbor navigation N b. provide better range performance on low lying targets during good weather and calm seas Y c. have a wider horizontal beam width N d. have more sea return during rough sea conditions 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 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 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 2982: You take a bearing of 142° and 259° of two objects. What bearing of a third object will give the best fix? -
Y a. 019° N b. 084° N c. 166° N d. 281° 3084: An ECDIS is required to display which information?
Y a. Soundings N b. Waypoints N c. Meteorological data N d. Radar targets 3085: An ECDIS is required to display which information?
N a. Water temperature N b. Climatology data N c. Speed of advance Y d. Depth contours