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.
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 167: When the Moon's declination is maximum north, which of the following will occur?
N a. Mixed-type tides N b. Higher high tides and lower low tides Y c. Tropic tides N d. Equatorial tides 192: The description "Racon" beside an illustration on a chart would mean a __________.
N a. radar conspicuous beacon N b. circular radio beacon Y c. radar transponder beacon N d. radar calibration beacon 374: There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?
Y a. Error of collimation N b. Prismatic error N c. Graduation error N d. Centering error 406: Your vessel is on course 135°T, speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40° on the starboard bow. Determine the speed of the apparent wind.
N a. 24.2 knots N b. 28.4 knots N c. 32.2 knots Y d. 36.0 knots 482: Which statement about a gnomonic chart is correct?
N a. A rhumb line appears as a straight line. N b. Distance is measured at the mid-latitude of the track line. N c. Meridians appear as curved lines converging toward the nearer pole. Y d. Parallels, except the equator, appear as curved lines. 513: You are radar scanning for a buoy fitted with a racon. Which radar screen represents the presentation you should expect on the PPI? (D017NG )
N a. A Y b. B N c. C N d. D 542: The only cylindrical chart projection widely used for navigation is the __________.
N a. Lambert conformal Y b. Mercator N c. azimuthal N d. gnomonic 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 801: You are entering an African port and see ahead of you a red can-shaped buoy. What action should you take?
Y a. Alter course to leave the buoy to port N b. Alter course to leave the buoy to starboard N c. Pass the buoy close aboard on either side N d. Pass the buoy well clear on either side 832: What is the most important source of information to be used in correcting charts and keeping them up to date?
N a. Fleet Guides Y b. Notice to Mariners N c. Sailing Directions N d. Pilot Charts 856: The flow of air around an anticyclone in the Southern Hemisphere is __________.
N a. clockwise and outward Y b. counterclockwise and outward N c. clockwise and inward N d. counterclockwise and inward 875: Sidereal hour angle is always __________.
N a. measured westward from the hour circle containing the first point of Aries N b. measured from the point on the celestial sphere occupied by the Sun at the vernal equinox N c. subtracted from the LHA of the star to obtain the LHA of Aries Y d. All of the above 899: A latitude line will be obtained by observing a body __________.
N a. on the prime vertical N b. on the celestial horizon Y c. at lower transit N d. on the Greenwich meridian 905: The Sun's center is coincident with the principal vertical circle when __________.
Y a. in lower transit N b. the hour circle and prime vertical are coincident N c. the declination is zero degrees and the azimuth is exactly N 135°E N d. the declination is zero degrees and the azimuth is exactly N 135°W 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 969: The population of northern right whales, an endangered species, numbers approximately __________.
Y a. 300 N b. 5000 N c. 100,000 N d. 1,000,000 977: In the Sargasso Sea there are large quantities of seaweed and no well defined currents. This area is located in the __________.
Y a. Central North Atlantic Ocean N b. Caribbean Sea N c. Western North Pacific Ocean N d. area off the west coast of South America 990: You plot a fix using three lines of position and find they intersect in a triangle. You should plot the position of the vessel __________.
N a. outside of the triangle N b. anywhere in the triangle N c. on the line of position from the nearest object, between the other two lines of position Y d. in the geometric center of the triangle 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 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1104: Which condition(s) is(are) necessary for the formation of dew?
N a. Clear skies N b. Calm air N c. Earth's surface cooler than the dew point of the air Y d. All of the above 1133: Which compensates for errors introduced when the vessel heels over?
N a. The soft iron spheres on the arms of the binnacle N b. Magnets placed in trays inside the binnacle Y c. A single vertical magnet beneath the compass N d. The Flinders bar 1165: Which statement concerning the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. Y b. There is a dangerous eddy southeast of Beito Island. N c. There is a 12-meter deep west of Beito Island and inside the 5-meter line. N d. The bottom to the south-southeast of the lightship is soft coral. 1259: General information on enroute weather and climate is found in __________.
Y a. the Sailing Directions and the Coast Pilot N b. a weather fax N c. the Local Notice to Mariners N d. the Light List 1306: What type of clouds are associated with a cold front?
N a. Altostratus and fracto-cumulus N b. Altostratus and cirrus N c. Cirrus and cirrostratus Y d. Cumulus and cumulonimbus 1348: Vessel required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
Y a. speed of the vessel over the ground or through the water N b. distance to the next port N c. time of the next navigational satellite pass N d. None of the above 1361: The luminous range of a light takes into account the __________.
N a. glare from background lighting Y b. existing visibility conditions N c. elevation of the light N d. observer's height of eye 1497: When drawing a weather map and an isobar crosses a front, the isobar is drawn __________.
N a. perpendicular to the front Y b. kinked and pointing away from the low N c. kinked and pointing towards the low N d. kinked and pointing towards the high for a warm front only 1598: A slow, gradual fall of the barometer indicates approaching __________.
N a. gale force winds within 12 hours N b. blizzard conditions Y c. deteriorating or unsettled weather N d. heavy, wind driven rain 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 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 1624: A psychrometer has two thermometers that provide dry bulb and wet bulb temperatures. By comparing these two temperature readings with a set of tables you can determine the __________.
N a. atmospheric pressure N b. wind speed Y c. relative humidity and dew point N d. wind chill factor 1671: Cirrus clouds are composed primarily of __________.
Y a. ice crystals N b. water droplets N c. snow crystals N d. nitrogen 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 1758: The climate of the eastern Gulf coast __________.
N a. is humid and subtropical throughout the year N b. has an east coast marine type of climate N c. has a Mediterranean type of climate Y d. varies from warm to subtropical 1922: In the North Sea area, you sight a buoy showing a quick white light with 9 flashes every 15 seconds. Which of the four topmarks shown would be fitted to the buoy? (D030NG )
N a. A N b. B Y c. C N d. D 2102: The subregions of the United States Gulf and East Coasts are numbered 11, 12 and 13 within the chart numbering system. Which chart number indicates a chart for either the Gulf or East Coast?
N a. 21214 Y b. 11314 N c. 14313 N d. 14114 2178: The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?
N a. They are not subject to permanent magnetism; no check is necessary. N b. Semiannually Y c. Annually N d. Every five years 2186: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. What action should be taken?
N a. Adjust the compass with the athwartships magnets until the compass reads 268°. N b. Adjust the compass with the fore-and-aft magnets until the compass reads 270°. N c. Adjust the compass with the quadrantal spheres until the compass reads 274°. Y d. Adjust the compass with the fore-and-aft magnets until the compass reads 268°. 2220: A dead reckoning (DR) plot __________.
N a. must utilize magnetic courses N b. must take set and drift into account N c. should be replotted hourly Y d. should be started each time the vessel's position is fixed 2272: Mars will not be visible __________.
N a. at elongation angles near 180° N b. from quadrature to opposition Y c. at conjunction N d. at opposition 2374: The largest of the navigational planets is __________.
N a. Mars N b. Venus Y c. Jupiter N d. Saturn 2378: Which light signal indicates that you may approach the lock?
N a. Flashing red Y b. Flashing amber N c. Steady amber N d. Steady green 2388: The reference point for determination of GMT is the passage of the mean sun over what line?
N a. First point of Aries N b. Observer's meridian N c. 0° longitude Y d. 180° longitude 2439: Which statement about the time diagram in illustration D008NG is TRUE? (D008NG )
Y a. You are in east longitude. N b. The Sun is setting for you. N c. Your date is different from the Greenwich date. N d. The GHA is approximately 160°. 2600: A parallel of latitude other than the equator is a __________.
N a. great circle N b. loxodromic curve Y c. small circle N d. gnomonic curve 2634: Under the U.S. Aids to Navigation System on the Western Rivers, a preferred-channel buoy is __________.
Y a. horizontally-banded red and green N b. vertically-striped red and white N c. solid red N d. solid green 2738: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 3 seconds after the signal was sounded. What is the distance to the shore?
N a. 1100 yards N b. 872 yards Y c. 550 yards N d. 792 yards 2742: A white diamond daymark with an orange border is a(n) __________.
N a. special mark Y b. information or regulatory mark N c. lateral aid on the intracoastal waterway N d. safe water mark 2800: Where is the pivot point of a towboat with a tow ahead?
N a. One-third the length of the combined unit forward of the towboat Y b. One-third the length of the combined unit back from the head N c. At the head of the towboat N d. One-half the length of the combined unit 2866: Some locations maintain a zone time of -13. What are the zone time and date if the Greenwich time and date are 2152, 10 January?
N a. 1052, 9 January N b. 0852, 10 January N c. 1052, 10 January Y d. 1052, 11 January 2939: The buoy indicated by the letter D as shown is a __________. (D044NG )
Y a. nun N b. can N c. spar N d. pillar 2981: The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________.
Y a. NAVTEX N b. HYDROLANT/HYDROPAC N c. NAVAREA N d. SAFESEA 3000: All aids to navigation listed in the Mississippi River System Light List are shown as miles from a reference point and on the __________.
N a. east or west bank Y b. left or right descending bank N c. port or starboard side of the vessel N d. left or right ascending bank 3005: The agonic line on an isomagnetic chart indicates the __________.
N a. magnetic equator N b. magnetic longitude reference line Y c. points where there is no variation N d. points where there is no annual change in variation 3052: The Sailing Directions contain information on __________.
N a. required navigation lights N b. lifesaving equipment standards N c. casualty reporting procedures Y d. currents in various locations 3064: ECDIS units incorporate Digital Chart Data Formats, which include __________.
N a. vector only N b. raster only Y c. vector and raster N d. imposed viewing 3070: The database information that should be shown when a chart is first displayed on ECDIS is the __________.
N a. display base information Y b. standard display information N c. system electronic nautical chart N d. chart display information 3083: Which theoretical minimum number of measurements from satellites does a GPS receiver need in order to provide an exact three-dimensional position?
N a. Five Y b. Four N c. Three N d. Two