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.
20: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
Y a. 77 miles N b. 82 miles N c. 87 miles N d. 93 miles 43: A buoy with a composite group-flashing light indicates a(n) __________.
N a. anchorage area N b. fish net area Y c. bifurcation N d. dredging area 68: A position obtained by taking lines of position from one object at different times and advancing them to a common time is a(n) __________.
N a. dead-reckoning position N b. estimated position N c. fix Y d. running fix 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 219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current?
N a. Mile 52 N b. New Castle N c. Marcus Hook Y d. Billingsport 221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of __________.
N a. group occulting Y b. Morse (A) N c. interrupted quick flashing N d. quick flashing 253: Loran-C is which type of system?
N a. Reflected electron N b. Electrical radiation N c. Quarterpoint electrical navigation Y d. Hyperbolic radio navigation 289: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
Y a. running fix N b. dead-reckoning position N c. fix N d. estimated position 308: The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323° at 0.6 knot. What current should you expect?
N a. 001° at 0.7 knot Y b. 018° at 0.4 knot N c. 052° at 0.6 knot N d. 089° at 0.9 knot 351: Which buoy may be odd numbered?
N a. A spherical buoy Y b. An unlighted can buoy N c. A red buoy N d. A yellow buoy 417: On 6 July 1983, at 1830 DST (ZD +4), what will be the predicted height of tide at Newburgh, NY?
N a. 3.3 feet N b. 2.6 feet N c. 2.4 feet Y d. 2.0 feet 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. 425: 90° - Ho = __________.
N a. sextant altitude N b. co-latitude N c. LHA Y d. zenith distance 430: The southeast trade winds actually blow toward the __________.
N a. southeast N b. south N c. east Y d. northwest 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 535: The tropical year differs from which year by 20 minutes?
N a. Astronomical year N b. Natural year N c. Equinoctial year Y d. Sidereal year 565: The letter B as shown represents the __________. (D006NG )
Y a. geoidal horizon N b. celestial horizon N c. visible horizon N d. sensible horizon 574: If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?
N a. 30.42 inches (1030 millibars) Y b. 30.45 inches (1031 millibars) N c. 30.50 inches (1032 millibars) N d. 30.53 inches (1033 millibars) 706: A steep barometric gradient indicates __________.
N a. calms N b. light winds Y c. strong winds N d. precipitation 739: The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.
Y a. 114°00'W N b. 110°00'W N c. 66°00'W N d. 66°00'E 780: Apparent wind speed blowing across your vessel while underway can be measured by a(n) __________.
N a. barometer N b. wind vane Y c. anemometer N d. thermometer 791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.
N a. X-shaped N b. two black spheres Y c. a single red sphere N d. a single red cone 821: In addition to monitoring channel 16, all Corps of Engineer locks may use as working channels __________.
N a. 06, 12 and 22A N b. 01A, 05A and 07A Y c. 12, 13 and 14 N d. 14, 24 and 28 925: Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming your vessel's location is still at the equator?
N a. 2208 N b. 2110 Y c. 2158 N d. 2317 955: The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.
N a. reduced to the meridian and plotted as a latitude line N b. calculated as a longitude line N c. plotted by using an intercept from an assumed position Y d. plotted as an arc around the GP of the body 959: What is the index error of sextant B in illustration D050NG? (D050NG )
N a. 0'30" off the arc N b. 1'00" off the arc Y c. 3'30" off the arc N d. 1'30" on the arc 1089: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 262° N b. 269° N c. 276° N d. 281° 1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.
N a. divisional parts Y b. coefficients N c. fractional parts N d. equations 1184: Your position X is at LAT 35°S. Which winds are you experiencing? (D009NG )
Y a. Northeasterly N b. Northwesterly N c. Southeasterly N d. Southwesterly 1249: What is the light characteristic of a lighted, preferred-channel buoy?
N a. Fixed and flashing N b. Continuous quick N c. Isophase Y d. Composite group-flashing 1301: The four standard light colors used for lighted aids to navigation are red, green, white, and __________.
N a. purple N b. orange N c. blue Y d. yellow 1310: An urgent marine storm warning message would be broadcast on __________.
N a. 2670 KHz N b. 156.80 MHz (VHF-FM Ch. 16) Y c. 157.10 MHz (VHF-FM Ch. 22A) N d. None of the above 1341: The height of a light is measured from which reference plane?
N a. Mean low water Y b. Mean high water N c. Average water level N d. Geographical sea level 1364: The Sailing Directions are published in the Enroute format and the __________.
N a. Coastal editions N b. World Port Index N c. Pilot format Y d. Planning Guide 1382: The chart indicates the variation was 3°45'W in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?
N a. 3°27'W N b. 3°27'E Y c. 4°03'W N d. 4°03'E 1384: Which type of cloud is indicated by number 9? (D039NG )
N a. Cumulus Y b. Cumulonimbus N c. Altostratus N d. Stratocumulus 1614: Hot air can hold __________.
N a. less moisture than cold air Y b. more moisture than cold air N c. the same amount of moisture as cold air N d. moisture independent of air temperature 1644: Which scale is used to estimate wind speed by observing sea conditions __________.
N a. Metric scale N b. Wind scale N c. Coriolis scale Y d. Beaufort scale 1646: Which picture in illustration D034NG shows a flashing light? (D034NG )
N a. A N b. B Y c. C N d. D 1678: Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?
N a. Storm Warnings N b. Time Announcements N c. GPS Information Y d. NAVAREA Warnings 1694: In the Southern Hemisphere the wind circulation in a high pressure system rotates __________.
N a. clockwise and inward N b. clockwise and outward Y c. counterclockwise and outward N d. counterclockwise and inward 1719: What is the direction of rotation of tropical cyclones, tropical storms and hurricanes in the Northern Hemisphere?
N a. Clockwise and outward Y b. Counterclockwise and inward N c. Counterclockwise and outward N d. Clockwise and inward 1722: Hurricanes may move in any direction. However, it is rare and generally of short duration when a hurricane in the Northern Hemisphere moves toward the __________.
N a. west or northwest N b. northeast Y c. southeast N d. north 1776: A vessel operating on the Great Lakes, and whose position is southeast of an eastward-moving storm center, would NOT experience __________.
N a. a falling barometer N b. lowering clouds and drizzle Y c. a northeast wind N d. rain or snow 1866: What term is used to describe a tank barge constructed with the structural framing inside the cargo tank and the side shell plating containing the cargo?
Y a. Single hull N b. Shell plated N c. Hopper type N d. Independent tank 1949: "Revolution" is the __________.
N a. wobbling of the Earth about its axis N b. motion of bodies in the solar system relative to the stars Y c. motion of a celestial body in its orbit N d. spinning of a celestial body about its axis 2098: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic east or magnetic west?
N a. Quadrantal spheres N b. Heeling magnets Y c. Fore-and-aft magnets N d. Athwartships magnets 2168: By convention, the north pole of a magnet is painted __________.
Y a. red N b. blue N c. white N d. black 2314: A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are forward you should raise the fore-and-aft tray. N b. If the blue ends of the magnets are aft you should lower the fore-and-aft tray. Y c. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the top, you should add some magnets. N d. If the blue ends of the magnets are aft, and the fore-and-aft tray is at the bottom, you should reverse the magnets. 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2366: The major problem with Moon sights is the __________.
N a. rapid changes in GHA and declination introduce errors into the calculations Y b. lack of a well defined limb during certain phases and positions in the sky N c. approximations used in the solution caused by the variable horizontal parallax N d. augmentation effect caused by the relatively short distance to the Moon 2698: You must draw a plotting sheet covering latitudes 38°N to 41°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 4 inches, what is the distance between latitude 38°N and latitude 41°N?
N a. 15.00 inches Y b. 15.49 inches N c. 15.75 inches N d. 16.25 inches 2782: Your radar is set on a true motion display. Which of the following will appear to move across the PPI scope.
Y a. Own ship's marker N b. Echo from a ship at anchor N c. Echoes from land masses N d. All of the above 2796: The correction tables in the Nautical Almanac for use with Moon sights do NOT include the effects of __________.
Y a. instrument error N b. augmentation N c. semidiameter N d. parallax 2868: 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. Which action should you take? (D048NG )
N a. Continue on the present heading until the range is in line then alter course to the right. Y b. Immediately alter course to the right to bring the range in line. N c. Immediately alter course to the left to bring the range in line. N d. Immediately alter course to 309°T if the range is closing. 2929: On 29 June 1981 you observe a back sight of the lower limb of the Moon. The sextant altitude (hs) is 114°16.9'. The height of eye is 36 feet and the index error is 2.0' on the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?
Y a. 66°31.6' N b. 66°31.0' N c. 66°28.8' N d. 66°26.0' 3041: The letter H in illustration D006NG represents the __________.
N a. refractive horizon N b. geoidal horizon N c. celestial horizon Y d. visible horizon 3079: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
N a. an indication within 5 seconds if the specified HDOP has been exceeded N b. a warning of loss of position N c. a differential GPS status indication of the receipt of DGPS signals Y d. All of the above 3086: Which data must ECDIS be able to record at one-minute intervals?
Y a. Course made good history N b. Estimated time of arrival N c. Speed through the water N d. Shaft RPM 3128: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS may be used to make passing arrangements via ship-to-ship text messaging thus relieving a vessel operator from sounding whistle signals or making contact via radiotelephone. Y b. AIS may be used to make passing arrangements via ship-to-ship text messaging but a vessel operator is still required to sound whistle signals unless the arrangement is made via radiotelephone. N c. AIS cannot be used to make passing arrangements because the system does not have the ability to communicate from ship-to-ship in this manner. N d. AIS cannot be used to make passing arrangements because the use of the ship-to-ship text messaging feature in this way is prohibited.