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.
22: Charts showing the coast of Mexico are produced by the United States __________.
Y a. National Geospatial-Intelligence Agency N b. Coast Guard N c. Naval Observatory N d. National Ocean Service 49: While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?
Y a. 000°T N b. 090°T N c. 150°T N d. 240°T 87: A tide is called diurnal when __________.
Y a. only one high and one low water occur during a lunar day N b. the high tide is higher and the low tide is lower than usual N c. the high tide and low tide are exactly six hours apart N d. two high tides occur during a lunar day 115: The date is the same all over the world at __________.
N a. 0000 GMT Y b. 1200 GMT N c. 0000 LMT for an observer at 90°E longitude N d. no time 151: Under the U.S. Aids to Navigation System, spherical buoys may be __________.
N a. numbered Y b. lettered N c. lighted N d. All of the above 152: A chart with a natural scale of 1:160,000 is classified as a __________.
N a. sailing chart Y b. general chart N c. coast chart N d. harbor chart 165: On 6 July 1981, at 1000 zone time, you cross the 180th meridian steaming westward. What is your local time?
N a. It is 1000, 5 July. N b. It is 1000, 6 July. N c. It is 2200, 7 July. Y d. It is 1000, 7 July. 196: The area of strong westerly winds occurring between 40°S and 60°S latitude is called the __________.
N a. polar easterlies N b. prevailing westerlies Y c. roaring forties N d. jet streams 214: A sextant having an index error that is "on the arc" has a __________.
N a. positive correction N b. dip error Y c. negative correction N d. semidiameter error 285: The apparent wind is zero when the true wind is __________.
N a. zero N b. from ahead and equal to the ship's speed Y c. from astern and equal to the ship's speed N d. from astern and is twice the ship's speed 329: The symbols shown are used on radio facsimile weather charts. Which symbol indicates a weather boundary? (D042NG )
N a. I N b. H N c. G Y d. F 381: A nun buoy will __________.
N a. be green in color Y b. have an even number N c. be left to port when entering from seaward N d. be cylindrical in shape 492: Which type of projection is formed if a plane is tangent to the Earth, and points are projected geometrically from the center of the Earth?
N a. Lambert conformal Y b. Oblique gnomonic N c. Mercator N d. Transverse conic 509: A line of position derived by radar range from an identified point on a coast will be a(n) __________.
N a. straight line Y b. arc N c. parabola N d. line parallel to the coast 551: Spoil grounds, anchorage areas, cable areas, and military exercise areas are all marked by yellow buoys. Which special mark on the buoy will indicate the specific area you are in?
N a. A topmark triangular in shape N b. A topmark spherical in shape Y c. Lettering on the buoy N d. A topmark consisting of two cones with the points up 584: The correction(s) which must be applied to an aneroid barometer reading include(s) __________.
Y a. height error N b. gravity error N c. temperature error N d. All of the above 853: The standard magnetic compass heading differs from the true heading by __________.
Y a. compass error N b. latitude N c. variation N d. deviation 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 939: That half of the hurricane to the right hand side of its track (as you face the same direction that the storm is moving) in the Northern Hemisphere is called the __________.
N a. windward side N b. leeward side N c. safe semicircle Y d. dangerous semicircle 1020: The Light List shows that a navigational light has a nominal range of 6 miles and a height above water of 18 feet (5.5 meters). Your height of eye is 40 feet (12.2 meters) and the visibility is 27.0 miles. At which approximate range will you first sight the light?
N a. 5.6 miles N b. 6.4 miles Y c. 9.8 miles N d. 12.1 miles 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 1134: The Earth's irregular heating is caused by __________.
N a. the time of day N b. the seasons N c. geography Y d. All of the above 1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Cirrocumulus Y c. Altocumulus N d. Nimbostratus 1197: Off Fire Island, NY with winds from the southwest, the average wind-driven current flows in a direction of __________.
N a. 014° Y b. 076° N c. 170° N d. 256° 1201: What is NOT true concerning color sectors of lights?
Y a. Color sectors are expressed in degrees from the light toward the vessel. N b. Color sectors may indicate dangerous waters. N c. Color sectors may indicate the best water across a shoal. N d. Color sectors may indicate a turning point in a channel. 1207: What will be the velocity of the tidal current at New London Harbor Entrance, CT, at 1615 EST (ZD +5) on 26 December 1983?
Y a. 0.2 knot N b. 0.4 knot N c. 0.7 knot N d. 0.9 knot 1252: Port side daymarks may be __________.
Y a. numbered N b. octagonal N c. black and white N d. of any shape 1256: A cold front moving in from the northwest can produce __________.
Y a. thunderstorms, hail, and then rapid clearing N b. increasing cloud cover lasting for several days N c. lengthy wet weather N d. low ceilings with thick cirrus clouds 1293: Deviation is caused by __________.
N a. changes in the earth's magnetic field N b. nearby magnetic land masses or mineral deposits Y c. magnetic influence inherent to that particular vessel N d. the magnetic lines of force not coinciding with the lines of longitude 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 1395: The lunar day is __________.
Y a. longer than a solar day N b. shorter than a solar day N c. the same length as the solar day N d. longer than a solar day during the summer months and shorter in winter months 1420: the position labeled "E" was plotted because __________. (D051NG )
N a. the vessel's position was fixed at 1145 N b. a dead reckoning position is plotted within a half-hour of each course change N c. the position is a running fix Y d. a dead reckoning position is plotted for each speed change 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 1516: Which correction(s) must be applied to an aneroid barometer?
Y a. Instrument error and height error N b. Instrument error only N c. Height error only N d. Instrument error and latitude correction 1606: Aids to navigation marking the intracoastal waterway can be identified by __________.
N a. the letters ICW after the aid's number or letter Y b. yellow stripes, squares, or triangles marked on them N c. white retroreflective material N d. the light characteristic and color for lighted aids 1686: Which of the following statements concerning frontal movements is TRUE?
N a. The temperature rises after a cold front passes. N b. The barometric pressure rises when a warm front passes. Y c. A cold front generally passes faster than a warm front. N d. A warm front usually has more violent weather associated with it than a cold front. 1691: Which of the following is associated with consistently high barometric pressure?
Y a. The horse latitudes N b. The doldrums N c. The prevailing westerlies N d. The trade winds 1745: When your vessel is on the storm track but behind the storm's center the __________.
N a. wind direction remains steady N b. wind speed decreases N c. barometer rises Y d. All of the above 1768: A flashing red light displayed at a single lock means that the lock __________.
N a. is ready to use but vessels must stand clear N b. is ready to use and vessels may approach Y c. cannot be made ready immediately and vessels shall stand clear N d. cannot be made ready immediately but vessels may approach 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 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 2001: You have changed course and steadied up on a range. Your heading is 285°T, same as the charted range, and it appears as in illustration D048NG. After several minutes the range appears as in illustration D047NG and your heading is still 285°T. This indicates a __________. (D047NG )
N a. south-setting current Y b. north-setting current N c. leeway caused by a NE'ly wind N d. course made good to the left of the DR track 2001: You have changed course and steadied up on a range. Your heading is 285°T, same as the charted range, and it appears as in illustration D048NG. After several minutes the range appears as in illustration D047NG and your heading is still 285°T. This indicates a __________. (D047NG )
N a. south-setting current Y b. north-setting current N c. leeway caused by a NE'ly wind N d. course made good to the left of the DR track 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 2104: A white buoy marked with an orange rectangle indicates __________.
N a. mid-channel N b. a fish net area Y c. general information N d. an anchorage 2200: Cloud formations are minimal when the __________.
Y a. surface temperature and temperature aloft are equal N b. surface temperature and temperature aloft differ greatly N c. barometric pressure is very low N d. relative humidity is very high 2211: What is the length of a nautical mile?
N a. 1,850 meters Y b. 6,076 feet N c. 5,280 feet N d. 2,000 yards 2234: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
N a. Move the quadrantal spheres closer to the compass N b. Raise the heeling magnet if the red end is up N c. Remove some of the Flinders bar Y d. Raise or lower the athwartship magnets 2248: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. What action should be taken to remove this error during compass adjustment?
N a. If the red ends of the magnets are to port you should raise the athwartships tray. N b. If the red ends of the magnets are to port, and the athwartships tray is at the top, you should add some more magnets. N c. If the red ends of the magnets are to starboard you should lower the athwartships tray. Y d. If the red ends of the magnets are to starboard, and the athwartships tray is at the top, you should add some more magnets. 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2375: The shortest distance between any two points on earth defines a __________.
N a. small circle Y b. great circle N c. rhumb line N d. hyperbola 2428: If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by __________.
Y a. green can buoys N b. red can buoys N c. green nun buoys N d. red nun buoys 2460: You are on course 344°T and take a relative bearing of a lighthouse of 270°. What is the true bearing to the lighthouse?
N a. 016° N b. 074° N c. 090° Y d. 254° 2659: IN REGION A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by a __________.
N a. black can buoy N b. red conical buoy N c. black conical buoy Y d. red can buoy 2804: The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used __________.
N a. when the declination and latitude are of different names N b. when the declination is greater than and the same name as the latitude N c. if the vessel is stopped or making bare steerageway Y d. on a fast vessel on northerly or southerly headings 2852: A daymark warning of a danger will have the shape indicated by which letter? (D045NG )
N a. A Y b. B N c. C N d. D 2889: On 29 June 1981 you observe a back sight of the upper 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' off the arc. The horizontal parallax is 60.5'. What is the observed altitude (Ho)?
N a. 66°23.8' N b. 66°04.4' N c. 66°00.4' Y d. 65°53.8' 2978: Where do you find the semidiameter correction to be used to correct sextant observations of the stars?
N a. It is included in the altitude corrections inside the front cover of the Nautical Almanac. N b. Table 25 in Bowditch contains the correction. N c. A correction of -0.5' should be applied to all star sights. Y d. No semidiameter correction is used. 3009: "Proceeding from seaward" for the purpose of the direction of buoying offshore, lateral system buoys would be proceeding __________.
N a. northerly on the Atlantic Coast N b. easterly on the Gulf Coast Y c. northerly on the Pacific Coast N d. None of the above 3033: A navigator fixing a vessel's position by radar __________.
Y a. can use radar information from one object to fix the position N b. should never use radar bearings N c. should only use radar bearings when the range exceeds the distance to the horizon N d. must use information from targets forward of the beam