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.
15: What is the length of a nautical mile?
N a. 1,800 meters N b. 2,000 yards Y c. 6,076 feet N d. 5,280 feet 35: You are on a vessel at 0400 ZT on 3 July, and the ZD for your position is -8. What is the GMT?
N a. 1200, 3 July N b. 2000, 3 July N c. 1200, 2 July Y d. 2000, 2 July 182: The scale on a chart is given as 1:5,000,000. This means that __________.
N a. 1 inch is equal to 5,000 inches on the Earth's surface N b. 1 nautical mile on the chart is equal to 5,000 inches on the Earth's surface Y c. 1 inch is equal to 5,000,000 inches on the Earth's surface N d. 1 nautical mile on the chart is equal to 5,000,000 inches on the Earth's surface 223: In the Loran-C configuration shown, the stations located at X, Y, and Z are called __________. (D003NG )
N a. repeater stations Y b. secondary stations N c. composite stations N d. alternate stations 344: A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has __________.
N a. error of perpendicularity Y b. side error N c. prismatic error N d. centering error 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 487: What will be the time after 0600 (ZD +3), on 6 March 1983, that the height of the tide at Puerto Rosales, Argentina, will be 9.0 feet (2.7 meters)?
N a. 0740 N b. 0754 N c. 0840 Y d. 0922 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 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 596: Which condition would NOT indicate the approach of a tropical storm?
N a. Long, high swells N b. Cirrus clouds N c. Halos about the Sun or Moon Y d. Decrease in wind velocity 630: What kind of weather would you expect to accompany the passage of a tropical wave?
Y a. Heavy rain and cloudiness N b. Good weather N c. A tropical storm N d. Dense fog 641: Buoys which mark isolated dangers are painted with alternating _____________ .
Y a. red and black bands N b. green and black bands N c. red and white stripes N d. green and white bands 643: When using the radar for navigating __________.
N a. the best fix is obtained by using a tangent bearing and a range N b. and using two radar ranges for a fix, the objects of the ranges should be close to reciprocal bearings Y c. and using ranges, the most rapidly changing range should be measured last N d. and crossing a radar range of one object with the visual bearing of a second object, the two objects should be 80° to 110° apart 645: The arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°, is the __________.
N a. altitude Y b. declination N c. latitude N d. azimuth angle 748: You are steaming west in the South 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 __________.
N a. to the north of you Y b. to the south of you N c. dead ahead of you N d. dead astern of you 918: At 1200 ZT, on 31 August, your position is LAT 43°14'S, LONG 175°44'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
N a. 01003, 94314, 51757 Y b. 31003, 99432, 31757 N c. 31123, 99432, 31754 N d. 31243, 94314, 31757 984: The bases of middle clouds are located at altitudes of between __________.
N a. 3,000 to 6,500 feet (914 to 1981 meters) Y b. 6,500 to 20,000 feet (1981 to 6096 meters) N c. 10,000 to 35,000 feet (3048 to 10,668 meters) N d. 20,000 to 60,000 feet (6096 to 18,288 meters) 1026: An air mass that has moved down from Canada would most likely have the symbols __________.
N a. mPk Y b. cPk N c. cTk N d. cTw 1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
Y a. 15.5 nm N b. 13.4 nm N c. 8.7 nm N d. 6.9 nm 1075: The expression "first magnitude" is usually used to refer only to bodies of magnitude __________.
Y a. 1.5 and greater N b. 1.25 and greater N c. 1.0 and greater N d. 0.5 and greater 1097: The velocity of a rotary tidal current will be decreased when the Moon is __________.
Y a. at apogee N b. new N c. full N d. All of the above 1181: An occulting light is one in which __________.
N a. the period of darkness exceeds the period of light N b. there is only a partial eclipse of the light N c. the periods of light and darkness are equal Y d. the period of light exceeds the period of darkness 1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?
N a. 2.1 feet N b. 1.7 feet N c. 1.2 feet Y d. 0.6 foot 1357: You will transit the Cape Cod Canal on 7 November 1983. If you arrive at the R R Bridge at 1655 EST (ZD +5), for what period of time during your transit will you have currents of not more than 0.5 knot?
N a. 1631 to 1719 N b. 1638 to 1655 Y c. 1648 to 1702 N d. 1655 to 1709 1413: The gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction is called __________.
N a. damping error N b. ballistic deflection N c. quadrantal error Y d. speed error 1429: A celestial body will cross the prime vertical circle when the latitude is numerically __________.
Y a. greater than the declination and both are of the same name N b. less than the declination and both are of the same name N c. greater than the declination and both are of contrary name N d. less than the declination and both are of contrary name 1431: A lighthouse is 120 feet (36.6 meters) high and the light has a nominal range of 18 miles. Your height of eye is 42 feet (12.8). If the visibility is 11 miles, approximately how far off the light will you be when the light becomes visible?
N a. 12.5 miles N b. 16.0 miles Y c. 19.0 miles N d. 23.5 miles 1433: A system of reservoirs and connecting tubes in a gyro compass is called a __________.
N a. spider element Y b. mercury ballistic N c. gyrotron N d. rotor 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 1506: You are steaming southward along the west coast of the United States when you sight a buoy showing a flashing green light. How should you pass this buoy?
N a. Leave it to your port. Y b. Leave it to your starboard. N c. Pass it close aboard on either side. N d. Pass it on either side but well clear of it. 1513: Scales on aneroid barometers are usually graduated in inches of mercury in the general range of __________.
N a. 26 to 29 inches Y b. 28 to 31 inches N c. 30 to 33 inches N d. 32 to 35 inches 1524: A barometric pressure reading of 29.92 inches of mercury is equivalent to __________.
Y a. 1013.25 millibars N b. 29.92 feet of water N c. 766 millimeters of mercury N d. 76 centimeters of water 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 1529: Widely spaced isobars on a weather map indicate __________.
N a. high winds Y b. gentle breezes N c. ice, snow or frozen rain N d. probability of tornados 1530: In shallow water, waves that are too steep to be stable, causing the crests to move forward faster than the rest of the wave, are called __________.
N a. rollers Y b. breakers N c. white caps N d. surfers 1565: Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), for an observer with a height of eye of 60 feet (18.3 meters).
N a. 18.4 nm Y b. 19.9 nm N c. 20.8 nm N d. 21.5 nm 1574: Information about currents around Pacific Coast ports of the U.S. is found in the __________.
N a. Nautical Almanac N b. Tide Tables Y c. Tidal Current Tables N d. Ocean Current Tables 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 1615: The Illustration shows the symbols used on radio facsimile weather charts. Which symbol indicates snow? (D042NG )
N a. G N b. H Y c. M N d. N 1655: Yesterday your chronometer read 11h 59m 59s at the 1200 GMT time tick. Today the chronometer reads 11h 59m 57s at the 1200 time tick. What is the chronometer rate?
N a. +2s Y b. -2s N c. -3s N d. +3s 1693: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" N b. a low front or an occluded front Y c. a high pressure area; an anticyclone; or a "high" N d. the "doldrums" 1731: When your vessel is on or near the path of an approaching tropical storm the __________.
N a. wind direction remains steady N b. wind speed increases N c. barometer falls Y d. All of the above 1739: Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?
N a. A backing wind Y b. A veering wind N c. A norther N d. A strong, gusty wind 1773: A "Norther" in the Gulf of Mexico is __________.
N a. a wind shift to the north accompanied by a drop in temperature N b. a forcible northerly wind of at least 20 knots N c. a strong northerly wind that generally occurs between November and March Y d. All of the above 1781: While in port, you can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the sky overhead N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions Y d. a weather map 2019: At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?
N a. Southern Y b. Western N c. Northern N d. Eastern 2100: You are underway in a vessel with a draft of 7.0 feet (2.1 meters). The charted depth for your position is 9 fathoms. You compute the height of tide to be +3.0 feet (0.9 meters). You determine the depth of the water beneath your keel to be __________.
N a. 32 feet (9.8 meters) N b. 41 feet (12.6 meters) Y c. 50 feet (15.3 meters) N d. 64 feet (19.6 meters) 2190: Clouds are classified according to their __________.
N a. size N b. moisture content Y c. altitude and how they were formed N d. location in a front 2332: Magnetic dip is a measurement of the angle between the __________.
N a. geographic pole and the magnetic pole N b. lubber's line and true north Y c. horizontal and the magnetic line of force N d. compass heading and the magnetic heading 2356: As observed from the Earth, the angle between lines from the Earth to the Sun and the Earth to an inferior planet is known as __________.
Y a. elongation N b. conjunction N c. opposition N d. quadrature 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 2569: The mean sun used to measure time moves __________.
N a. along the ecliptic at 15° per hour N b. along the celestial equator at 15° per day N c. along the ecliptic at 15° per day Y d. along the celestial equator at 15° per hour 2589: Under the IALA cardinal system, a mark with a quick white light showing 6 flashes followed by one long flash indicates that the safest water is on the __________.
N a. north side of the mark N b. west side of the mark N c. east side of the mark Y d. south side of the mark 2612: The dividing meridian between zone descriptions -7 and -8 is __________.
Y a. 112°30'E N b. 118°30'E N c. 120°00'E N d. 116°30'W 2627: Stormy weather is usually associated with regions of __________.
N a. high barometric pressure Y b. low barometric pressure N c. steady barometric pressure N d. changing barometric pressure 2836: The correction tables in the front of the Nautical Almanac for use with sun sights do NOT include the effects of __________.
N a. mean refraction N b. parallax N c. semidiameter Y d. irradiation 3013: A white buoy with an orange rectangle on it displays __________.
Y a. directions N b. dangers N c. exclusion areas N d. All of the above 3069: The database resulting from (1) the transformation of the electronic navigational chart (ENC) by ECDIS for appropriate use, (2) the updates to the ENC by appropriate means, and (3) the additional data added by the mariner, is called the __________.
N a. display base information N b. standard display information Y c. system electronic navigational chart N d. chart display information 3087: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
Y a. a warning of loss of position N b. a cross-track error alarm N c. an indication of a change in satellite configuration N d. an alarm if engine speed is suddenly reduced 3113: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign N b. Vessel's draft N c. Route plan Y d. None of the above