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 105: If the GMT is 1500, the time at 75°E longitude is __________.
N a. 1000 N b. 1500 N c. 1700 Y d. 2000 172: A chart with a scale of 1:45,000 is a __________.
Y a. harbor chart N b. coast chart N c. general chart N d. sailing chart 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 298: A great circle crosses the equator at 173°E. It will also cross the equator at what other longitude?
Y a. 7°W N b. 73°E N c. 73°W N d. 173°W 367: What will be the time after 0800 EST (ZD +5) that the height of the tide at South Freeport, ME, will be 6.0 feet (1.8 meters) on 7 November 1983?
N a. 0936 N b. 0942 Y c. 0951 N d. 1001 424: For an accurate barometer check, you would __________.
N a. check it with a barometer on another vessel N b. take readings from several barometers and average them N c. check it with the barometer at the ship chandlery Y d. check it against radio or National Weather Service reports of the immediate vicinity 431: When a buoy marks a channel bifurcation, the preferred channel is NOT indicated by __________.
N a. the shape of an unlighted buoy N b. the light color of a lighted buoy N c. the color of the topmost band Y d. whether the number is odd or even 474: Which indication on the barometer is most meaningful in forecasting weather?
N a. The words "Fair -- Change -- Rain" Y b. The direction and rate of change of barometric pressure N c. The actual barometric pressure N d. The relative humidity 489: You are anchored in the Aleutian Island chain and receive word that a tsunami is expected to strike the islands in six hours. What is the safest action?
Y a. Get underway and be in deep, open-ocean water when the tsunami arrives. N b. Increase the scope of the anchor cable and drop the second anchor underfoot at short stay. N c. Get underway and be close inshore on the side of the island away from the tsunami. N d. Plant both anchors with about a 60° angle between them, and let out a long scope to each anchor. 533: You are using a radar in which your own ship is shown at the center, and the heading flash always points to 0°. If bearings are measured in relation to the flash, what type of bearings are produced?
Y a. Relative N b. True N c. Compass N d. Magnetic 568: The chart of a beach area shows a very steep slope to the underwater beach bottom. Which type of breakers can be expected when trying to land a boat on this beach?
Y a. Surging N b. Converging N c. Spilling N d. Plunging 580: On 21 January 1981, you observe a back sight of the Sun's lower limb. The sextant altitude (hs) is 121°31.5'. The index error is 2.5' on the arc. The height of eye is 31 feet (9.3 meters). What is the observed altitude (Ho)?
N a. 31°06.2' Y b. 58°53.1' N c. 58°12.2' N d. 58°03.2' 585: What great circle is always needed to form the astronomical triangle?
N a. Celestial Equator N b. Prime Meridian Y c. Celestial Meridian N d. Prime Vertical Circle 612: Which statement is TRUE concerning a Mercator projection?
N a. Degrees of longitude decrease in length as latitude increases. Y b. The length of the meridians is increased to provide for equal expansion in all directions. N c. The mileage between the meridians is increased as the latitude increases. N d. All of the above 668: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 042° at 105 miles from you. What is the course to steer at 10 knots to intercept vessel A?
N a. 063° N b. 068° N c. 073° Y d. 079° 710: What is the FIRST sign of the existence of a well developed tropical cyclone?
N a. Gale force winds from the north Y b. An unusually long ocean swell N c. Steep, short-period waves and light wind N d. Thunderstorms and higher than usual humidity 719: You are on course 209°T. In order to check the longitude of your vessel, you should observe a celestial body on which bearing?
N a. 209° Y b. 270° N c. 299° N d. 000° 774: Variation is not constant; it is different with every change in __________.
N a. speed N b. vessel heading Y c. geographical location N d. cargo 886: The circulation around a low pressure center in the Northern Hemisphere is __________.
Y a. counterclockwise N b. variable N c. clockwise N d. anticyclonic 892: When a buoy is in position only during a certain period of the year, where may the dates when the buoy is in position be found?
Y a. Light List N b. Notice to Mariners N c. On the chart N d. Coast Pilot 914: If the sky was clear, with the exception of a few cumulus clouds, it would indicate __________.
N a. rain N b. hurricane weather Y c. fair weather N d. fog setting in 1042: What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 8.7 nm N b. 9.9 nm N c. 14.4 nm Y d. 15.9 nm 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° 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 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 1224: NGA (NIMA) charts are adopting the metric system. In order to change a charted depth in meters to feet you may use the conversion table found __________.
N a. in the Light List N b. in Bowditch Vol. II N c. on the chart Y d. All of the above 1275: How is variation indicated on a small-scale nautical chart?
N a. Magnetic compass table N b. Magnetic meridians Y c. Isogonic lines N d. Variation is not indicated on small-scale nautical charts. 1312: Which factor(s) is/are used to develop the charted information of a lighthouse?
Y a. Height and intensity of the light N b. Height of the light and the observer N c. Height of the observer and the intensity of the light N d. Height of the light only 1349: The symbols shown are used on radio facsimile weather charts. Which of these symbols indicates a severe squall line? (D042NG )
N a. F N b. I Y c. G N d. H 1356: The first indications a mariner will have of the approach of a warm front will be __________.
N a. large cumulonimbus (thunderclouds) building up Y b. high cirrus clouds gradually changing to cirrostratus and then to altostratus N c. fog caused by the warm air passing over the cooler water N d. low dark clouds accompanied by intermittent rain 1400: Which type of cloud is among the most dependable for giving an indication of an approaching weather system?
N a. Cumulus Y b. Altostratus N c. Cumulostratus N d. Nimbus 1410: A white buoy marked with an orange rectangle indicates __________.
N a. a fish net area Y b. general information N c. an anchorage N d. mid-channel 1421: What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer with a height of eye of 65 feet?
N a. 16.8 nm Y b. 19.0 nm N c. 20.6 nm N d. 22.4 nm 1514: The compass error of a magnetic compass that has no deviation is __________.
N a. zero Y b. equal to variation N c. eliminated by adjusting the compass N d. constant at any geographical location 1582: Sextant C in illustration D043NG reads __________. (D043NG )
N a. 30°45.9' N b. 29°56.0' N c. 29°52.0' Y d. 29°47.5' 1611: What indicates a dual purpose buoy?
N a. Red buoy with a horizontal yellow band N b. Red and white vertically-striped buoy with a vertical yellow stripe N c. Red and white vertically-striped buoy with a red spherical topmark Y d. Green buoy with a yellow square 1623: Which of the following statements is FALSE?
N a. An anemometer measures wind speed. N b. A barometer measures atmospheric pressure. N c. A thermometer measures temperature. Y d. A psychrometer measures wind pressure. 1637: Which of the following is NOT a form of precipitation?
N a. rain Y b. frost N c. sleet N d. snow 1653: In a weather report, the term "visibility" expresses __________.
N a. how far you can see with the "naked eye" N b. how far you can see with a telescope or binoculars N c. how well you can identify an object at night Y d. the distance in miles at which prominent objects are identifiable 1659: The type of fog that occurs on clear nights with very light breezes and forms when the earth cools rapidly by radiation is known as __________.
Y a. radiation fog N b. frontal fog N c. convection fog N d. advection fog 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 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 1750: Clearance gauges at bridges indicate __________.
N a. the height of the tide N b. depth of water under the bridge N c. charted vertical clearance at mean low water Y d. distance from the water to low steel of the bridge 1873: Lighted information markers show __________.
N a. green lights N b. red lights N c. yellow lights Y d. white lights 1952: 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 Y b. Geocentric libration N c. Diurnal libration N d. Physical libration 2016: Which statement about the Flinders bar of the magnetic compass is CORRECT?
Y a. It compensates for the error caused by the vertical component of the Earth's magnetic field. N b. It compensates for error caused by the heeling of a vessel. N c. It compensates for quadrantal deviation. N d. It is only needed in equatorial waters. 2093: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
N a. Light List Vol. V N b. List of Lights Y c. Broadcast Notice to Mariners N d. Sailing Directions 2101: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained by consulting the __________.
Y a. Broadcast Notice to Mariners N b. Light List Vol. V N c. U.S. Coast Pilot N d. All of the above 2348: Under the IALA cardinal system, a mark with a quick light showing 9 flashes every 15 seconds indicates that the safest water is on the __________.
N a. north side of the mark Y b. west side of the mark N c. east side of the mark N d. south side of the mark 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 2389: The autumnal equinox is the point where the Sun is at __________.
N a. maximum declination north N b. maximum declination south N c. 0° declination going to northerly declinations Y d. 0° declination going to southerly declinations 2442: 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°. You should now adjust the compass until it reads __________.
N a. 356° N b. 358° N c. 000° Y d. 002° 2452: The permanent magnetism of a vessel may change in strength due to __________.
N a. the nature of the cargo being carried N b. changes in heading Y c. major structural repair N d. All of the above 2598: A vessel is proceeding downstream in a narrow channel on the Western Rivers when another vessel is sighted moving upstream. Which vessel has the right of way?
N a. The vessel moving upstream against the current Y b. The vessel moving downstream with a following current N c. The vessel located more towards the channel centerline N d. The vessel with the least amount of maneuverability 2768: Which type of daymark is used to mark the starboard side of the channel when entering from sea?
N a. Red and white octagon N b. Black and white diamond Y c. Red triangle N d. Green square 2792: You take a bearing of 142° and 259° of two objects. Which bearing of a third object will give the best fix?
N a. 081° N b. 238° Y c. 201° N d. 234° 2798: A can buoy is indicated by which letter in illustration D044NG?
Y a. A N b. B N c. C N d. D 2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?
N a. Strong, gusting winds from the NW with thundershowers N b. Light winds from the northeast with clear skies N c. A "blue norther" Y d. Southerly winds with steady rain; fog or overcast 3074: ECDIS must give an alarm for which of the following cases?
N a. When the speed of a dangerous target exceeds a set limit Y b. When the specified limit for deviation from the planned route is exceeded N c. If the ship's ETA has changed beyond the set limit N d. None of the above