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.
34: The Local Notice to Mariners is usually published __________.
N a. daily Y b. weekly N c. monthly N d. semiannually 171: Under the U.S. Aids to Navigation System, a lighted buoy with a spherical topmark marks __________.
Y a. safe water N b. a fish trap area N c. a hazard to navigation N d. a bifurcation in the channel 229: The shoreline on charts generally represents the mean __________.
Y a. high water line N b. low water line N c. low water spring line N d. tide level 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 354: In order to remove side error from a sextant, you should adjust the __________.
N a. horizon glass to make it parallel to the horizon mirror with the index set at zero N b. horizon glass to make it perpendicular to the index mirror with the index set at zero Y c. horizon glass to make it perpendicular to the sextant frame N d. telescope to make it parallel to the sextant frame 501: Which of the buoys listed below could be used to mark an anchorage?
N a. White buoy numbered "3" N b. White buoy with a green top N c. White buoy with orange bands Y d. Yellow buoy lettered "N" 515: The small circle of the celestial sphere parallel to the celestial equator, and transcribed by the daily motion of the body, is called the __________.
N a. hour circle of the body Y b. parallel of declination N c. vertical circle of the body N d. parallel of altitude 526: When a hurricane passes over colder water or land and loses its tropical characteristics, the storm becomes a(n) __________.
N a. high pressure area Y b. extratropical low-pressure system N c. tropical storm N d. easterly wave 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° 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 768: The wind velocity is higher in the dangerous semicircle of a tropical cyclone because of the __________.
Y a. wind circulation and forward motion of the storm N b. extension of the low pressure ridge N c. recurvature effect N d. direction of circulation and pressure gradient 813: At the magnetic equator there is no induced magnetism in the vertical soft iron because __________.
N a. the lines of force cross the equator on a 0°-180° alignment N b. the quadrantal error is 0° Y c. there is no vertical component of the Earth's magnetic field N d. the intercardinal headings have less than 1° error 843: The line which connects the points of zero magnetic dip is __________.
N a. an agonic line Y b. the magnetic equator N c. a magnetic meridian N d. All of the above 903: Eight points of a compass are equal to how many degrees?
N a. 45 Y b. 90 N c. 180 N d. 360 929: Which error is NOT included in the term "current" when used in relation to a fix?
N a. Poor steering N b. Leeway Y c. Known compass error N d. Ocean currents 954: A thin, whitish, high cloud popularly known as "mares' tails" is __________.
N a. altostratus N b. stratus N c. cumulus Y d. cirrus 1240: Weather information is available from __________.
N a. commercial radio broadcasts N b. the Coast Guard on scheduled marine information broadcasts N c. VHF-FM continuous marine weather broadcasts provided by the National Weather Service Y d. All of the above 1344: Which of the buoy symbols shown indicates a safe water mark? (D032NG )
Y a. D N b. C N c. B N d. A 1401: The maximum distance at which a light may be seen under existing visibility conditions is called __________.
N a. nominal range Y b. luminous range N c. charted range N d. geographic range 1415: Planetary aberration is due, in part, to __________.
N a. refraction of light as it enters the Earth's atmosphere N b. rotation of the Earth on it's axis Y c. the body's orbital motion during the time required for its light to reach Earth N d. a false horizon 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 1439: The symbols shown are used on radio facsimile weather charts. The symbol indicated at letter "G" represents a __________. (D042NG )
N a. weather boundary N b. thunderstorm N c. wide spread sandstorm Y d. severe, line squall 1479: A microbarograph is a precision instrument that provides a __________.
N a. charted record of atmospheric temperature over time Y b. charted record of atmospheric pressure over time N c. graphic record of combustible gases measured in an atmosphere N d. graphic record of vapor pressure from a flammable/combustible liquid 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 1523: Which is a characteristic of the weather preceding an approaching warm front?
N a. Gusty winds Y b. Steadily falling barometric pressure N c. Decreasing relative humidity N d. Clearing skies 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 1586: A green buoy has a yellow triangle on it. This is a(n) __________.
N a. information or regulatory buoy that has lateral significance N b. buoy that is off-station and is marked to warn mariners of its wrong position Y c. dual purpose marking used where the ICW and other waterways coincide N d. buoy that was set in error and will be replaced with a red nun buoy 1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.
Y a. bar of the storm N b. eye of the storm N c. funnel N d. front 1661: Advection fog may be formed by warm moist air passing over a __________.
N a. warmer sea surface Y b. cooler sea surface N c. dry coastal plain N d. polar land mass 1910: What sextant correction corrects the apparent altitude to the equivalent reading at the center of the Earth?
N a. Phase Y b. Parallax N c. Semidiameter N d. Augmentation 1958: The spinning of a celestial body about its axis is known as __________.
Y a. rotation N b. revolution N c. space motion N d. nutation 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 2043: Stormy weather is usually associated with regions of __________.
N a. changing barometric pressure N b. high barometric pressure N c. steady barometric pressure Y d. low barometric pressure 2087: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?
N a. 33.0 nm N b. 20.0 nm Y c. 13.5 nm N d. 8.5 nm 2113: Vessels regularly navigating rivers above Cairo, Illinois, shall at all times have on board a copy of __________.
Y a. U.S. Army Corps of Engineers Regulations (Blue Book) N b. Nautical Almanac for the year N c. Sailing Directions N d. Light List Vol. V 2171: Diagram number D037NG represents a movable dam. If there is high water and the wickets are down so that there is an unobstructed navigable pass through the dam, what light(s) will be shown at B if the lock walls and piers are not awash?
N a. One amber light N b. One red light N c. Two red lights Y d. Three red lights 2243: Which aid is NOT marked on a chart with a magenta circle?
N a. Radar station N b. Radar transponder beacon Y c. Aero light N d. Radio beacon 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 2309: The plane of the ecliptic is inclined to the plane of the celestial equator by what angle?
N a. 00°23' Y b. 23°27' N c. 45°00' N d. 90°00' 2324: Deneb is found in what constellation?
Y a. Cygnus N b. Pegasus N c. Ursa Major N d. Andromeda 2326: A double star is a star that __________.
N a. has a declination equal to twice that of the Sun Y b. comprises two stars that appear close together N c. is twice as bright as a single star N d. suddenly becomes much brighter and then fades 2342: What happens because of augmentation?
Y a. The Moon appears larger as the elevation increases. N b. The Sun appears larger when viewed against the darker background of the horizon. N c. The horizon appears elevated when observing a bright Sun or Moon at low altitudes. N d. The Moon appears larger at the full Moon. 2369: Which magnetic compass corrector(s) CANNOT be set on a heading of magnetic east or magnetic west?
Y a. Heeling magnet N b. Flinders bar N c. Fore-and-aft magnets N d. All of the above can be set on magnetic east or magnetic west headings. 2372: In the North Sea area, you sight a buoy showing a quick white light showing 6 flashes followed by one long flash at 15 second intervals. Which of the four topmarks illustrated in diagram D031NG would be fitted to this buoy? (D031NG )
N a. A N b. B Y c. C N d. D 2400: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light on the facility light up. What does this indicate?
N a. A barge at the facility has commenced transferring a hazardous cargo. N b. A barge carrying a hazardous cargo is mooring or unmooring at the facility. N c. The facility is warning a barge to shut down transfer operations due to weather conditions (electrical storm, tornado, hurricane, etc.). Y d. There is danger at the facility due to a fire or cargo release. 2402: 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 356°. You should now adjust the compass until it reads __________.
Y a. 358° N b. 000° N c. 002° N d. 004° 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 2586: A chart has extensive corrections to be made to it. When these are made and the chart is again printed, the chart issue is a __________.
N a. first edition Y b. new edition N c. revised edition N d. reprint 2602: The lunar day is also known as the __________.
N a. lunitidal interval N b. vulgar establishment of the port N c. nodal day Y d. tidal day 2666: The following boats are approaching a lock. Which has priority for locking?
N a. An 85-foot yacht Y b. Corps of Engineer towboat running empty-headed N c. "Delta Queen" (passenger vessel) N d. An integrated chemical tow 2674: In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceeding downstream will __________.
N a. have the upper band red N b. show a red light if lighted N c. have a characteristic of composite group flashing if lighted Y d. All of the above 2841: You are required to enter a lock on your voyage. Information on the lock regulations, signals, and radio communications can be found in __________.
Y a. Coast Pilot N b. Corps of Engineer Information Bulletin N c. Bowditch N d. the publication "Key to the Locks" 2843: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix N b. running fix Y c. dead-reckoning position N d. probable position 2945: A position that is obtained by applying estimated current and wind to your vessel's course and speed is a(n) __________.
Y a. estimated position N b. dead reckoning position N c. fix N d. None of the above 2954: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )
N a. Continue on the present heading until the range is in line then alter course to the left. N b. Immediately alter course to the right to bring the range in line. Y c. Continue on course until the range is closed, then alter course to the right. N d. Immediately alter course to 309°T. 3075: Chart information details to be used in ECDIS should be the latest edition of information originated by a government-authorized hydrographic office and conform to the standards of (the) __________.
N a. International Maritime Organization Y b. International Hydrographic Organization N c. NASA N d. US Coast Guard 3078: Which data must ECDIS be able to record at one-minute intervals?
N a. Position N b. Electronic navigational chart source N c. Course made good history Y d. All of the above 3111: Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations, vessels and aircraft?
N a. Vessel's type N b. Vessel's course N c. Navigational status Y d. All of the above