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.
75: The zone time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?
Y a. 0659 N b. 0652 N c. 1859 N d. 1852 85: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m of the 4th day of the month. Six minutes later your position is 179°59'E longitude. Your LMT and date is now __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 140: You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 080°T, 100 miles from your position. The hurricane is moving towards 265°T at 22 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?
N a. 76 miles N b. 69 miles Y c. 63 miles N d. 56 miles 206: The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the __________.
N a. doldrums N b. westerlies Y c. trades N d. easterlies 249: When using GPS, how many theoretical position lines are required for a three-dimensional fix that takes into account altitude?
N a. 1 N b. 2 N c. 3 Y d. 4 318: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. distance to the next port Y b. speed of the vessel over the ground or through the water N c. time of the next navigational satellite pass N d. None of the above 362: Which statement about a simple conic chart projection is TRUE?
N a. It is an equal-area projection. N b. It is a conformal projection. N c. Meridians appear as curved lines. Y d. The scale is correct along any meridian. 404: An aneroid barometer is an instrument __________.
N a. used to measure the speed of wind Y b. in which the pressure of the air is measured N c. that tells which direction a storm is coming from N d. used to measure the height of waves 447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?
Y a. 5.3 feet (1.6 m) N b. 5.6 feet (1.7 m) N c. 6.2 feet (1.9 m) N d. 6.8 feet (2.7 m) 518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.
Y a. selective availability is set to zero N b. the satellites are all below 15° in elevation N c. your vessel is equipped with a Doppler receiver N d. the horizontal dilution of precision is high 696: The diurnal pressure variation is most noticeable in the __________.
N a. polar regions N b. horse latitudes N c. roaring forties Y d. doldrums 728: In the Bay of Fundy, during twilight, you a take sight of Mars. The sextant altitude (hs) is 03°35.5'. Your height of eye is 32 feet and there is no index error. The air temperature is -10°C and the barometer reads 1010 millibars. What is the observed altitude (Ho)?
N a. 03°14.5' Y b. 03°15.8' N c. 03°16.2' N d. 03°28.8' 731: Under the IALA Buoyage Systems, a vertically-striped buoy may be striped red and __________.
N a. green N b. black Y c. white N d. yellow 734: You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?
N a. 1.0 mile Y b. 1.5 miles N c. 2.0 miles N d. 2.5 miles 873: Compass error is equal to the __________.
N a. deviation minus variation N b. variation plus compass course Y c. combined variation and deviation N d. difference between true and magnetic heading 928: The position labeled "D" was plotted because __________. (D051NG )
Y a. a dead reckoning position is plotted for each course change N b. a dead reckoning position is plotted within 30 minutes of a running fix N c. the vessel's speed changed at 1125 N d. All of the above 968: The world is divided into NAVAREAS for the dissemination of important marine information. Which NAVAREAS include the U.S. coasts?
N a. I and II Y b. IV and XII N c. V and X N d. VI and VII 1052: What is the approximate geographic range of Southwest Ledge Light, Connecticut, if your height of eye is 32 feet (9.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
Y a. 15.5 nm N b. 13.4 nm N c. 8.7 nm N d. 6.9 nm 1135: A position on the Earth has a longitude of 74°10'E. Its celestial counterpart would have a __________.
Y a. GHA of 285°50' N b. SHA of 74°10' N c. SHA of 285°50' N d. LHA of 74°10'E 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 1198: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a dust storm? (D042NG )
N a. I N b. H Y c. O N d. P 1251: A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than __________.
N a. 1.0 second duration N b. 1.5 seconds duration Y c. 2.0 seconds duration N d. 3.0 seconds duration 1263: The compass deviation changes as the vessel changes __________.
N a. geographical position N b. speed Y c. heading N d. longitude 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 1448: Spring tides occur when the __________.
N a. Moon is in its first quarter or third quarter phase N b. Sun and Moon are in quadrature N c. Moon's declination is maximum and opposite to that of the Sun Y d. Moon is new or full 1449: The presence of stratus clouds and a dying wind will usually result in __________.
N a. heavy rain N b. heavy snow Y c. thick fog N d. clearing skies 1537: Which sextant in illustration D043NG reads 29°47.5'? (D043NG )
N a. A N b. B Y c. C N d. D 1584: A decrease in barometric pressure is associated with all of the following except __________.
N a. rising warm air N b. proximity to a low pressure area N c. inward spiraling circulation Y d. clear dry weather 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 1736: Which statement is FALSE concerning the dangerous semicircle of a hurricane?
N a. The actual wind speed is increased by the forward movement of the storm along its track N b. the direction of the wind and the sea might carry a vessel directly into the storm's path N c. The seas are higher Y d. The rain is heavier 1816: A white buoy with an orange circle marked on it indicates __________.
N a. danger N b. vessels are excluded from the area N c. a mooring buoy Y d. operating restrictions are in effect 1832: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic northeast or magnetic southeast?
N a. Flinders bar N b. Heeling magnets N c. Fore-and-aft magnets Y d. Quadrantal spheres 1841: The letter A as shown represents the __________. (D006NG )
Y a. sensible horizon N b. geoidal horizon N c. visible horizon N d. celestial horizon 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 2059: Illustration D038NG represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter E in the illustration? (D038NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 2069: Illustration D037NG represents a moveable dam. If a bear trap is open what will be displayed at the lock to indicate this condition? (D037NG )
N a. A flashing amber light Y b. A white circular disc N c. A red diamond N d. Two amber lights 2078: If a towboat requires a double lockage it shall give which sound signal at a distance of not more than one mile from the lock?
N a. One short blast followed by two long blasts N b. One long blast followed by one short blast N c. Two long blasts followed by one short blast Y d. One long blast followed by two short blasts 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 2126: Your chart indicates that there is an isolated rock and names the rock using vertical letters. This indicates the __________.
N a. rock is visible at low water springs only N b. rock is a hazard to deep draft vessels only Y c. rock is dry at high water N d. exact position of the rock is doubtful 2191: The chart indicates the variation was 3°45'E in 1988, and the annual change is increasing 6'. If you use the chart in 1991 how much variation should you apply?
N a. 3°27'E N b. 3°27'W N c. 3°45'E Y d. 4°03'E 2209: 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°. You should now adjust the compass until it reads __________.
Y a. 268° N b. 270° N c. 274° N d. Do not adjust the compass, just record the error. 2222: By convention, the south pole of a magnet is painted __________.
N a. red Y b. blue N c. white N d. black 2255: The height of tide is the __________.
N a. depth of water at a specific time due to tidal effect N b. difference between the depth of the water at high tide and the depth of the water at low tide N c. difference between the depth of the water and the high water tidal level Y d. difference between the depth of the water and the area's tidal datum 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 2387: You are on a voyage from New Orleans to Boston and navigating off the Florida coast. You will get the greatest benefit from the Gulf Stream if you navigate __________.
N a. about 5 miles east of Cape Canaveral N b. about 15 miles east of Daytona N c. along the 50-fathom curve Y d. about 20 miles east of Jupiter Inlet 2462: Under ideal viewing conditions, the dimmest star that can be seen with the unaided eye is of what magnitude?
N a. First N b. Third N c. Fourth Y d. Sixth 2522: The letter H in illustration D006NG represents the __________. (D006NG )
N a. celestial horizon N b. geoidal horizon Y c. visible horizon N d. refractive horizon 2530: The distance between any two meridians measured along a parallel of latitude __________.
N a. increases in north latitude and decreases in south latitude N b. decreases as DLO increases N c. increases with increased latitude Y d. decreases with increased latitude 2594: At McAlpine L & D, normal upper pool elevation is 420.0 feet (130.8 meters) MSL, equal to 12.0 feet (3.7 meters) on the upper gage. The vertical clearance at the Clark Memorial Highway bridge is 72.6 feet (22.1 meters) above normal pool. What is the clearance if the gage reads 10.6 feet (3.2 meters)?
N a. 84.6 feet (25.8 meters) N b. 83.2 feet (25.4 meters) Y c. 74.0 feet (22.6 meters) N d. 62.0 feet (18.9 meters) 2638: A vessel crossing a river on the Western Rivers has the right of way over __________.
N a. vessels ascending the river N b. vessels descending the river N c. all vessels ascending and descending the river Y d. None of the above 2656: What is the equivalent of 0 min. 16 sec. in arc units?
N a. 0°32' N b. 0°16' Y c. 0°04' N d. 0°01' 2662: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 28". The area includes latitude 37°S to 42°S and longitude 175°E to 179°W. Allow a one inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 3.33 inches N b. 3.41 inches Y c. 3.67 inches N d. 3.82 inches 2684: The maximum difference between mean time and apparent time is __________.
N a. equal to the longitude expressed in time units Y b. about 16 minutes N c. the difference between the GHA of mean sun and the first point of Aries N d. 15° of arc 2884: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
Y a. Ship No. 1 does not appear as an individual target due to the effect of beam width. N b. Small island is not detected due to the multiple echo effect from the mountain. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. N d. Ship No. 2 is not detected due to the side lobe effect of radar reflecting from the mountain. 2926: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. Which action should you take? (D047NG )
Y a. Come left until the range closes then steer to the left of 306°T. N b. Alter course to the right to 309°T or more to bring the range in line. N c. Continue on course but be prepared to come right if the range continues to open. N d. Alter course to the left to close the range, then alter course to 309°T. 2931: The vertical distance from the tidal datum to the level of the water is the __________.
N a. range of tide Y b. height of tide N c. actual water depth N d. charted depth 2949: On 13 November 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 109°26.3'. The height of eye is 66 feet, and the index error is 2.0' on the arc. What is the observed altitude (HO)?
N a. 70°56.6' N b. 70°38.0' Y c. 70°27.2' N d. 70°23.2' 2988: The buoy indicated by the letter A is a __________. (D044NG )
N a. nun Y b. can N c. spar N d. pillar 3038: In low latitudes, the low(s) of the diurnal variation of pressure occur(s) at __________.
N a. noon N b. noon and midnight N c. 1000 and 2200 Y d. 0400 and 1600 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer