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.
38: When navigating a vessel, you __________.
N a. can always rely on a buoy to be on station N b. can always rely on a buoy to show proper light characteristics N c. should assume a wreck buoy is directly over the wreck Y d. should never rely on a floating aid to maintain its exact position 101: A lighted preferred-channel buoy may show a __________.
N a. fixed red light N b. Morse (A) white light Y c. composite group-flashing light N d. yellow light 113: The type of transmission used in Loran-C is a __________.
N a. single pulse N b. wide pulse Y c. multipulse N d. narrow pulse 143: Under the IALA - A Buoyage System, a buoy used as a port hand mark would not show which light characteristic?
N a. Isophase N b. Quick flashing N c. Long flashing Y d. Group Flashing (2 + 1) 320: Sometimes foreign charts are reproduced by NGA (NIMA). On such a chart, a wire-dragged, swept area may be shown in green or __________.
N a. red N b. black Y c. purple N d. yellow 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 377: Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983.
N a. 1.4 feet (0.5 meter) Y b. 1.9 feet (0.6 meter) N c. 2.3 feet (0.7 meter) N d. 2.6 feet (0.8 meter) 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.
N a. Indian Ocean N b. North Pacific Ocean N c. South Pacific Ocean Y d. South Atlantic Ocean 522: All straight lines represent great circle tracks on a chart based on a(n) __________.
N a. Mercator projection N b. polyconic projection N c. orthographic projection Y d. gnomonic projection 550: The description "Racon" beside an illustration on a chart would mean a __________.
Y a. radar transponder beacon N b. radar conspicuous beacon N c. radar calibration beacon N d. circular radio beacon 697: The set of the current is the __________.
N a. speed of the current at a particular time N b. maximum speed of the current N c. direction from which the current flows Y d. direction in which the current flows 702: Which publication contains information on navigation regulations, landmarks, channels, anchorages, tides, currents, and clearances of bridges for Chesapeake Bay?
Y a. Coast Pilot N b. Light List N c. Sailing Directions N d. Pilot Charts 723: If there is any doubt as to the proper operation of a radar, which statement is TRUE?
N a. Only a radar expert can determine if the radar is operating. N b. All radars have indicator lights and alarms to signal improper operation. Y c. A radar range compared to the actual range of a known object can be used to check the operation of the radar. N d. The radar resolution detector must be energized to check the radar. 930: Which statement about radio navigational warnings is TRUE?
Y a. The topics for warnings included in HYDROLANTS, HYDROPACS, and NAVAREA warnings are the same. N b. NAVAREA warnings concern only coastal navigation and inland navigation in large bays or sounds such as Puget Sound. N c. The United States is responsible for NAVAREA warnings in the North Atlantic north of 7°N, and west of 15°W. N d. Long range radio navigational warnings are usually broadcast by radiotelephone, radiotelegraph, and radio-teletypewriter. 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 940: What is the length of a nautical mile?
Y a. 6,076 feet N b. 5,280 feet N c. 2,000 yards N d. 1,850 meters 1034: The expression "the air is saturated" means __________.
Y a. the relative humidity is 100% N b. the vapor pressure is at its minimum for the prevailing temperature N c. precipitation has commenced N d. cloud cover is 100% 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 1045: The Light List shows that a navigational light has a nominal range of 15 miles and a height above water of 40 feet (12.2 meters). Your height of eye is 25 feet (7.6 meters) and the visibility is 5 miles. At about what range will you FIRST sight the light?
N a. 6.2 miles Y b. 9.5 miles N c. 12.9 miles N d. 14.2 miles 1097: The velocity of a rotary tidal current will be decreased when the Moon is __________.
Y a. at apogee N b. new N c. full N d. All of the above 1113: A single vertical magnet placed underneath the compass in the binnacle is used to compensate for __________.
N a. the horizontal component of the permanent magnetism Y b. deviation caused by the vessel's inclination from the vertical N c. induced magnetism in the horizontal soft iron N d. induced magnetism in the vertical soft iron 1192: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 284°T at 43 miles from you. What is the course to steer at 16 knots to intercept vessel A?
N a. 284° Y b. 303° N c. 329° N d. 342° 1194: In the Northern Hemisphere, an observer at point II in the weather system should experience a wind shift from the __________. (D014NG )
Y a. southwest, clockwise to northwest N b. northeast, clockwise to west-southwest N c. northeast, counterclockwise to northwest N d. east, counterclockwise to south-southwest 1200: You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which the current does not exceed 0.3 knot?
N a. 0911 to 0955 N b. 0940 to 1010 N c. 0955 to 1044 Y d. 0935 to 1017 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. 1274: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a sandstorm? (D042NG )
N a. H Y b. O N c. P N d. K 1406: What will act to dissipate fog?
N a. Upwelling cold water N b. Advection of warm air over a colder surface N c. Rain that is warmer than air Y d. Downslope motion of an air mass along a coast 1422: Cumulus clouds are indicated by what number in illustration D039NG? (D039NG )
N a. 3 N b. 5 N c. 6 Y d. 7 1429: A celestial body will cross the prime vertical circle when the latitude is numerically __________.
Y a. greater than the declination and both are of the same name N b. less than the declination and both are of the same name N c. greater than the declination and both are of contrary name N d. less than the declination and both are of contrary name 1438: In the Northern Hemisphere you are caught in the dangerous semicircle of a storm with plenty of sea room available. The best course of action is to bring the wind on the __________.
N a. port quarter and make as much headway as possible N b. starboard quarter and make as much headway as possible Y c. starboard bow and make as much headway as possible N d. port bow and make as much headway as possible 1501: What is the distance from the bottom of a wave trough to the top of a wave crest?
N a. Wave length Y b. Wave height N c. Wave breadth N d. Wave depth 1526: A single barometric pressure reading of 28.60 indicates __________.
N a. rapidly improving weather N b. deteriorating weather Y c. a severe low pressure system N d. fair weather and calm 1578: The LMT of sunrise on the standard meridian is 0552. Your longitude is 99°15'E. What is your ZT of sunrise?
N a. 0512 N b. 0529 N c. 0552 Y d. 0615 1601: Sextant B in illustration D043NG reads __________. (D043NG )
N a. 30°51.0' Y b. 30°42.5' N c. 30°47.5' N d. 31°00.0' 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. 1689: The "horse latitudes" are regions of __________.
N a. brisk prevailing winds Y b. light airs and calms N c. abundant blue sea grass vegetation N d. None of the above 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 1812: The line of position should be plotted as a circle around the GP of the body when the Ho exceeds what minimum value?
N a. 80° N b. 83° N c. 85° Y d. 87° 1831: 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. red conical buoy N b. black can buoy Y c. red can buoy N d. black conical buoy 1842: What is the major problem with taking high altitude observations?
N a. Possible errors due to unusual refraction may exist. N b. The tables are not as accurate due to inherent errors in the spherical triangle at high altitudes. N c. Rapidly changing altitudes make it difficult to get an accurate altitude. Y d. It is difficult to establish the point where the sextant is vertical to the horizon. 1886: What is the relative bearing of an object dead astern?
N a. 000° N b. 090° Y c. 180° N d. 270° 1962: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
Y a. the port side of the channel N b. a sharp turn in the channel to the right N c. a junction with the preferred channel to the left N d. a wreck to be left on the vessel's starboard side 1982: In the horizon system of coordinates what is equivalent to the Greenwich hour angle of the celestial equator system?
N a. Zenith distance N b. Coaltitude N c. Altitude Y d. Azimuth 2070: What is the relative bearing of an object on the port beam?
N a. 045° N b. 090° N c. 180° Y d. 270° 2086: You are downbound on the Ohio River locking through Greenup. The chamber has been emptied and the lower gates are open. You hear one short blast of the whistle from the lock. You should __________.
Y a. leave the lock N b. hold up until another tow enters the adjacent lock N c. tie off to the guide wall until the river is clear of traffic N d. hold in the lock chamber due to a malfunction with the gate 2147: What lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over blue Y b. Red over amber (yellow) N c. Red over green N d. None of the above 2196: A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment?
Y a. If the quadrantal spheres are all the way out, replace them with smaller spheres. N b. If the quadrantal spheres are all the way in, replace them with larger spheres. N c. If the quadrantal spheres are all of the way out, move the spheres in. N d. If the quadrantal spheres are all the way out, replace them with larger spheres. 2212: Which information is found in the chart title?
N a. Number of the chart N b. Edition date N c. Variation information Y d. Survey information 2262: The Milky Way is an example of a __________.
N a. cluster Y b. galaxy N c. nova N d. nebula 2280: Which would influence a magnetic compass?
N a. Electrical wiring N b. Iron pipe N c. Radio Y 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 2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.
N a. black Y b. red N c. green N d. yellow 2567: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
N a. a sharp turn in the channel to the right N b. a wreck to be left on the vessel's starboard side N c. a junction with the preferred channel to the left Y d. the port side of the channel 2809: The diurnal variation of pressure is not visible in the middle latitudes in winter because __________.
Y a. it is masked by the pressure changes of moving weather systems N b. the decreased gravitational effect from the sun causes the variation to fade N c. the decreased average temperature is less than the critical temperature N d. the increased Coriolis force disperses the pressure variation 2839: Privately maintained aids to navigation included in the Light List __________.
N a. are painted white and must use a white light if lighted N b. must be conspicuously marked by a signboard with the words "PRIVATE AID" Y c. must conform to the standards of the U.S. Aids to Navigation System N d. are not permitted in or along first-class waterways and may be authorized for second- and third-class waterways 2925: A single line of position combined with a dead-reckoning position results in a(n) __________.
N a. running fix N b. fix N c. assumed position Y d. estimated position 2941: During daylight savings time the meridian used for determining the time is located farther __________.
N a. west in west longitude and east in east longitude N b. east in west longitude and west in east longitude Y c. east N d. west 3056: A position obtained by applying ONLY your vessel's course and speed to a known position is a __________.
N a. fix Y b. dead-reckoning position N c. running fix N d. probable position 3062: If the electronic chart is part of an ECDIS, it must display the minimum data required by IMO/IHO, to include all of the following EXCEPT __________.
N a. hydrography N b. aids to navigation Y c. tidal currents N d. regulatory boundaries 3110: While underway, automatic identification systems (AIS) broadcast all of the following information every 1 to 10 seconds EXCEPT the __________.
N a. speed over ground N b. latitude and longitude N c. course over ground Y d. ship's scantlings