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.
9: When displayed under a single-span fixed bridge, red lights indicate __________.
Y a. the channel boundaries N b. that vessels must stop N c. the bridge is about to open N d. that traffic is approaching from the other side 109: While proceeding along the Norwegian coast on course 039°T, you sight the black-yellow-black banded buoy shown bearing 053°T. What action should you take? (D021NG )
N a. Alter course to 053° and leave the buoy close aboard on either side N b. Maintain course Y c. Alter course to 060° and ensure that the true bearings decreases N d. Alter course to port to rapidly open the bearing to the right 149: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
N a. 339° Y b. 333° N c. 326° N d. 320° 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 216: The prevailing winds in the band of latitude from approximately 5°N to 30°N are the __________.
N a. prevailing westerlies Y b. northeast trade winds N c. southeast trade winds N d. doldrums 264: Which of the four adjustable errors in the sextant is the principle cause of index error?
N a. Telescope not being parallel to the frame Y b. Index mirror and horizon glass not being parallel N c. Index mirror not being perpendicular to the frame N d. Horizon glass not being perpendicular to the frame 274: Which of the four adjustable errors in the sextant causes side error?
Y a. Horizon glass not being perpendicular to the frame N b. Index mirror not being perpendicular to the frame N c. Telescope not being parallel to the frame N d. Elliptical centering error 287: The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.
N a. between -.7 and +.5 feet N b. between 1.9 and 3.2 feet N c. 4.1 feet Y d. 1.2 feet 308: The wind at Frying Pan shoals has been west-northwesterly at an average velocity of 40 knots. The predicted set and drift of the rotary current are 323° at 0.6 knot. What current should you expect?
N a. 001° at 0.7 knot Y b. 018° at 0.4 knot N c. 052° at 0.6 knot N d. 089° at 0.9 knot 311: You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. The buoy should be left on __________.
N a. the vessel's starboard side Y b. the vessel's port side N c. either side close aboard N d. either side well clear 336: You are steaming eastward in the North Atlantic in an extratropical cyclonic storm and the wind is dead ahead. According to the law of Buys Ballot, the center of the low pressure lies __________.
N a. ahead of you N b. astern of you N c. to the north Y d. to the south 432: When using a Lambert conformal chart in high latitudes, angles such as bearings are measured in reference to __________.
N a. the meridian through the object of the bearing Y b. the meridian through the ship's position N c. the meridian midway between the ship and the object N d. any meridian 535: The tropical year differs from which year by 20 minutes?
N a. Astronomical year N b. Natural year N c. Equinoctial year Y d. Sidereal year 545: The arc of a great circle which passes through the body and celestial poles is part of the __________. (D007NG )
Y a. hour circle N b. diurnal circle N c. observer's meridian N d. altitude circle 606: Early indications of the approach of a hurricane may be all of the following EXCEPT __________.
Y a. short confused swells N b. gradually increasing white clouds (mare's tails) N c. pumping barometer N d. continuous fine mist-like rain 619: According to Buys Ballot's Law, when an observer in the Southern Hemisphere experiences a northwest wind, the center of the low pressure is located to the __________.
N a. east-northeast Y b. south-southwest N c. east-southeast N d. west-southwest 652: What agency of the U.S. Government issues charts of U.S. waters and Coast Pilots?
Y a. National Ocean Service N b. National Imagery and Mapping Agency N c. U.S. Coast Guard N d. U.S. Naval Observatory 796: Cyclones tend to move __________.
N a. perpendicular to the isobars in their warm sectors Y b. parallel to the isobars in their warm sectors N c. parallel to the line of the cold front N d. perpendicular to the line of the cold front 1005: The refraction correction table given in the Nautical Almanac is based on a standard or average atmospheric density with a temperature of 50°F (10°C) and atmospheric pressure of __________.
N a. 29.72 inches (1006 millibars) Y b. 29.83 inches (1010 millibars) N c. 29.89 inches (1012 millibars) N d. 29.93 inches (1014 millibars) 1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon Y b. 5-fathom curve N c. prohibited area N d. lighted buoy 1148: The numeral in the center of a wind rose circle on a pilot chart indicates the __________.
N a. total number of observations N b. average wind force on the Beaufort scale N c. average wind force in knots Y d. percentage of calms 1177: The magnitude of three stars is indicated. Which star is the brightest?
Y a. Canopus - 0.9 N b. Vega + 0.1 N c. Antares + 1.2 N d. Cannot be determined; magnitude indicates size not brightness 1248: On 6 July 1983, at 1520 DST (ZD +4) what will be the predicted height of tide at Newburgh, NY?
N a. 2.1 feet N b. 1.7 feet N c. 1.2 feet Y d. 0.6 foot 1297: What will be the velocity of the tidal current at Bournedale, MA, at 1135 DST (ZD +4) on 3 May 1983?
N a. 1.1 knots N b. 2.3 knots Y c. 3.0 knots N d. 3.6 knots 1304: The distance to the nearest vertex from any point on a great circle track cannot exceed __________.
Y a. 5400 nautical miles N b. 5840 nautical miles N c. 6080 nautical miles N d. 10,800 nautical miles 1321: A lighthouse can be identified by its __________.
N a. painted color N b. light color and phase characteristic N c. type of structure Y d. All of the above 1416: Radiation fog __________.
N a. always forms over water Y b. is formed by a temperature inversion N c. is thinnest at the surface N d. dissipates during the evening 1456: The fog produced by warm moist air passing over a cold surface is called __________.
N a. conduction fog N b. radiation fog N c. frontal fog Y d. advection fog 1471: A mountain peak charted at 700 feet breaks the horizon, and your height of eye is 12 feet. What is your approximate distance off (choose closest answer)?
Y a. 34.7 nm N b. 40.3 nm N c. 55.3 nm N d. 61.6 nm 1477: The wind in the vicinity of Nantucket Shoals Light has been southerly at an average speed of 23 knots. The predicted set and drift of the rotary tidal current are 225° at 0.8 knot. What are the set and drift of the current you can expect at Nantucket Shoals Light?
N a. 025° at 1.8 knots N b. 218° at 1.1 knots Y c. 235° at 0.5 knot N d. 247° at 0.7 knot 1599: The time interval between successive wave crests is called the __________.
N a. trough Y b. period N c. frequency N d. epoch 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 1632: Lighted white and orange buoys must show which color light?
N a. Orange N b. Red Y c. White N d. Alternating yellow and white 1634: A lighted buoy to be left to starboard, when entering a U.S. port from seaward, shall have a __________.
Y a. red light N b. white light N c. green light N d. light characteristic of Morse (A) 1678: Which information is NOT provided in broadcasts by the National Institute of Standards and Technology?
N a. Storm Warnings N b. Time Announcements N c. GPS Information Y d. NAVAREA Warnings 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 1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.
N a. pressure gradient Y b. Coriolis effect N c. aurora borealis N d. ballistic deflection 1701: Which general weather conditions should you expect to find in a low pressure system?
N a. Fair weather Y b. Precipitation and cloudiness N c. Scattered clouds at high elevations N d. Gradual clearing and cooler temperatures 1707: "Surface circulation" is another term for __________.
N a. cyclones N b. air in motion at all levels of the atmosphere Y c. wind in the lower troposphere N d. ocean currents 1760: A Doppler log in the bottom return mode indicates the __________.
N a. velocity of the current N b. bottom characteristics N c. depth of the water Y d. speed over the ground 1888: What is the relative bearing of an object broad on the starboard bow?
N a. 030° Y b. 045° N c. 060° N d. 075° 1950: The error in a sextant altitude caused by refraction is greatest when the celestial body is __________.
N a. high in the sky Y b. near the horizon N c. rising N d. at or near transit 1968: The Earth has the shape of a(n) __________.
N a. sphere Y b. oblate spheroid N c. spheroid of revolution N d. oblate eggoid 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 2162: The new Moon cannot be seen because the Moon is __________.
N a. in the opposite direction of the Sun N b. below the horizon Y c. between the Earth and the Sun N d. at quadrature 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 2282: 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 276°. You should now adjust the compass until it reads __________.
N a. 264° N b. 270° Y c. 273° N d. Do not adjust the compass, just record the error. 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°. 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° 2624: You must construct a Mercator plotting sheet on a piece of paper measuring 30" by 32". The area includes latitudes 31°10'S to 37°40'S and longitudes 007°00'W to 001°00'E. Allow a one-half 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 limitation?
Y a. 3.69 inches N b. 3.52 inches N c. 3.38 inches N d. 3.26 inches 2692: The dividing meridian between zone descriptions -2 and -3 is __________.
N a. 15°30'E N b. 30°00'E Y c. 37°30'E N d. 45°00'E 2719: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the right descending bank are __________.
N a. red diamond-shaped panels with red reflector borders N b. red triangular-shaped panels with red reflector borders Y c. green square-shaped panels with green reflector borders N d. green triangular-shaped panels with green reflector borders 2719: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the right descending bank are __________.
N a. red diamond-shaped panels with red reflector borders N b. red triangular-shaped panels with red reflector borders Y c. green square-shaped panels with green reflector borders N d. green triangular-shaped panels with green reflector borders 2764: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to port will have the shape indicated by what letter in illustration D045NG?
N a. A N b. B N c. C Y d. D 2829: A spar buoy is indicated by which letter in illustration D044NG?
N a. A Y b. B N c. C N d. D 2956: On 23 August 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 116°42.8'. The height of eye is 56 feet and the index error is 2.0' off the arc. What is the observed altitude (Ho)?
N a. 63°42.0' N b. 63°38.0' N c. 63°19.4' Y d. 63°06.2' 2972: You are in a channel inbound from sea. A daymark used to mark a channel junction when the preferred channel is to starboard will have the shape indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 3021: Which information is found in the chart title?
N a. Chart number Y b. Chart sounding datum N c. Revision and edition date N d. Variation information 3095: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 6 hours Y b. 12 hours N c. 18 hours N d. 24 hours 3106: What does an automatic identification system (AIS) transponder use to transmit and receive information broadcasts?
N a. 3000 Mhz and 9200 Mhz N b. 2182 Khz and 2187.5 Khz Y c. 156.525 Mhz, 161.975 Mhz and 162.025 Mhz N d. 1575.42 Mhz and 1227.6 Mhz