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.
23: If Loran-C signals become unsynchronized, the receiver operator is warned because __________.
Y a. signals begin to blink N b. signals begin to shift N c. stations discontinue transmission N d. stations transmit grass 44: The speed of sound through ocean water is nearly always __________.
Y a. faster than the speed of calibration for the fathometer N b. the same speed as the speed of calibration for the fathometer N c. slower than the speed of calibration for the fathometer N d. faster than the speed of calibration for the fathometer, unless the water is very warm 58: You should plot your dead reckoning position __________.
N a. at every course change N b. hourly N c. at every speed change Y d. All of the above are correct. 99: You are enroute to Jacksonville, FL, from San Juan, P.R. There is a fresh N'ly wind blowing. As you cross the axis of the Gulf Stream you would expect to encounter __________.
N a. smoother seas and warmer water Y b. steeper waves, closer together N c. long swells N d. cirrus clouds 129: In working out a local apparent noon sight for your latitude, you subtract the Ho from 90°. The 90° represents the angular distance from __________.
N a. the equator to the elevated pole Y b. your horizon to your zenith N c. your zenith to the elevated pole N d. the geographical position of the Sun to the elevated pole 194: The horizon glass of a sextant is __________.
Y a. silvered on its half nearer the frame N b. mounted on the index arm N c. between the horizon and the shade glasses N d. All of the above 211: The light rhythm of Morse (A) is shown on __________.
N a. preferred-channel buoys N b. starboard- or port-side buoys N c. special marks Y d. safe water buoys 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 326: You are steaming west 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 low pressure lies to the __________.
Y a. north N b. south N c. east N d. west 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. 411: When entering from seaward, a buoy displaying a single-flashing red light would indicate __________.
N a. a junction with the preferred channel to the left N b. a sharp turn in the channel to the right Y c. the starboard side of the channel N d. a wreck to be left on the vessel's port side 437: Your vessel will be docking at Chester, PA, during the evening of 22 April 1983. The chart shows a depth of 20 feet (6.1 meters) at the pier. What will be the depth of water available at 1856 EST (ZD +5)?
N a. 22.4 feet (6.8 meters) Y b. 23.4 feet (7.2 meters) N c. 24.9 feet (7.6 meters) N d. 25.7 feet (7.8 meters) 457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4).
N a. 3.0 feet N b. 3.5 feet N c. 4.0 feet Y d. 4.4 feet 491: A special purpose buoy shall be __________.
N a. lighted with a white light N b. striped black and red N c. lighted with a red light Y d. yellow 532: In a river subject to tidal currents, the best time to dock a ship without the assistance of tugs is __________.
N a. at high water Y b. at slack water N c. at flood tide N d. when there is a following current 677: A swift current occurring in a narrow passage connecting two large bodies of water, which is produced by the continuously changing difference in height of tide at the two ends of the passage, is called a __________.
Y a. hydraulic current N b. rectilinear current N c. rotary current N d. harmonic current 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 701: In the IALA Buoyage System, buoys with alternating red and green horizontal bands are used to indicate __________.
N a. fishing areas N b. spoil grounds Y c. the preferred channel N d. isolated dangers 774: Variation is not constant; it is different with every change in __________.
N a. speed N b. vessel heading Y c. geographical location N d. cargo 835: When taking stars, those bodies to the east and west will __________.
Y a. change altitude rapidly N b. change altitude slowly N c. remain in an almost fixed position N d. appear to be moving in the plane of the horizon 840: Which position includes the effects of wind and current?
Y a. Estimated position N b. Set position N c. Leeway position N d. Dead reckoning position 878: At 0600 ZT on 31 January, your position is LAT 00°49'S, LONG 84°27'E. You are preparing a weather report form, WS Form B-80. How should you encode the first three groups after the call sign if you estimate the wind? (D041NG )
N a. 30243, 90008, 30848 N b. 31003, 99049, 38427 Y c. 31003, 99008, 30844 N d. 31063, 99049, 58427 936: A cyclone in its final stage of development is called a(n) __________.
N a. tornado N b. anticyclone Y c. occluded cyclone or occluded front N d. polar cyclone 1003: The quadrantal spheres are used to __________.
Y a. remove deviation on the intercardinal headings N b. remove deviation on the cardinal compass headings N c. remove heeling error N d. compensate for induced magnetism in vertical soft iron 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 1163: The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________.
N a. divisional parts Y b. coefficients N c. fractional parts N d. equations 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 1204: Which of the symbols in illustration DO18NG designates a stationary front? (D018NG )
Y a. A N b. B N c. C N d. D 1227: What will be the direction and velocity of the tidal current at Provincetown Harbor, MA, at 1405 DST (ZD +4) on 5 May 1983?
N a. 0.0 knot at 135°T N b. 0.2 knot at 135°T Y c. 0.4 knot at 315°T N d. 0.6 knot at 315°T 1231: Some lights used as aids to marine navigation have a red sector to indicate a danger area. How are the limits of a colored sector of light listed in the Light List?
N a. Geographical positions outlining the area of the sector N b. True bearings as observed from the light toward a vessel Y c. True bearings as observed from a vessel toward the light N d. Bearings given in the Light List are always magnetic 1290: In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?
N a. National Geospatial-Intelligence Agency N b. U.S. Hydrological Survey Y c. U.S. Coast Guard N d. American Meteorological Service 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 1323: The magnetic compass error which changes with the geographical location of your vessel is called __________.
N a. deviation Y b. variation N c. compensation N d. differentiation 1376: What is typical of warm front weather conditions?
N a. An increase in pressure N b. A wind shift from southwest to northwest N c. Scattered cumulus clouds Y d. Steady precipitation 1411: The nominal range of a light may be accurately defined as the maximum distance at which a light may be seen __________.
N a. under existing visibility conditions N b. under perfect visibility Y c. with ten miles visibility N d. with fifteen miles visibility 1452: When is the rhumb line distance the same as the great circle distance?
N a. Course 090°T in high latitudes Y b. Course 180°T when you cross the equator N c. Course 045°T in low latitudes N d. The rhumb line distance is always longer than the great circle distance. 1475: Which type of cloud is the classic "thunderhead"?
Y a. Cumulonimbus N b. Stratus N c. Cirrus N d. Altostratus 1484: You should plot your dead reckoning position at __________.
N a. every fix or running fix N b. every course change N c. every speed change Y d. All of the above are correct. 1656: Which instrument is most useful in forecasting fog?
N a. A barometer N b. An anemometer Y c. A sling psychrometer N d. A pyrometer 1697: In the Northern Hemisphere, if the center of a high pressure area is due west of you, what wind direction would you expect?
N a. South to west N b. South to east Y c. North to west N d. North to east 1714: Which statement concerning storm surges on the Great Lakes is FALSE?
Y a. They are common along the deeper areas of the lakes. N b. They cause rapid differences in levels between one end of the lake and the other. N c. The greatest water level difference occurs when the wind is blowing along the longitudinal axis of the lake. N d. If the wind subsides rapidly, a seiche effect will most likely occur. 1783: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
N a. the National Weather Service Observing Handbook No.1, Marine Surface Observations Y b. a weather fax N c. the Coast Pilot or Sailing Directions N d. the sky overhead 1791: The accuracy of an azimuth circle can be checked by __________.
N a. sighting a terrestrial range in line and comparing the observed bearing against the charted bearing N b. aligning the relative bearing markings so that 000° is on the lubber's line and the line of sight passes over the center of the compass N c. ensuring that the alignment marks on the inner face of the circle are in line with those on the repeater on relative bearings of 000° and 090° Y d. comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant 2068: The illustration 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 D if the lock walls and piers are not awash? (D037NG )
Y a. One red light N b. Two red lights N c. Three red lights N d. One amber light 2158: Permanent magnetism is caused by __________.
N a. operation of electrical equipment and generators on board ship Y b. the earth's magnetic field affecting the ship's hard iron during construction N c. the horizontal component of the earth's magnetic field acting on the horizontal soft iron N d. the vertical component of the earth's magnetic field acting on the vertical soft iron 2182: 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 D if the lock walls and piers are not awash?
N a. No lights Y b. One red light N c. Two red lights N d. Three red lights 2330: You are heading in a northerly direction when you come across an easterly current. Your vessel will __________.
Y a. be pushed to starboard N b. be pushed to port N c. decrease in engine speed N d. remain on course 2536: A revised print of a chart is made __________.
N a. after every major hydrographic survey of the area covered by the chart N b. when there are numerous corrections to be made or the corrections are extensive Y c. when a low-stock situation occurs and minor corrections are made N d. every two years to update the magnetic variation information 2572: The dividing meridian between zone descriptions -4 and -5 is __________.
N a. 60°00'E Y b. 67°30'E N c. 75°00'E N d. 60°00'W 2652: The dividing meridian between zone descriptions -10 and -11 is __________.
N a. 135°30'E N b. 145°00'E N c. 150°00'E Y d. 157°30'E 2779: The buoy indicated by the letter B in illustration D044NG is a __________.
N a. nun N b. can Y c. spar N d. pillar 2886: On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.
Y a. water depth exceeding 100 feet N b. fetch N c. wind's velocity N d. duration of the wind 2896: You are navigating in pilotage waters. The maximum time between fixes should be about __________.
N a. 5 minutes Y b. 30 minutes N c. 1 hour N d. 4 hours 2978: Where do you find the semidiameter correction to be used to correct sextant observations of the stars?
N a. It is included in the altitude corrections inside the front cover of the Nautical Almanac. N b. Table 25 in Bowditch contains the correction. N c. A correction of -0.5' should be applied to all star sights. Y d. No semidiameter correction is used. 3008: You take a bearing of 086° of a lighthouse. Which bearing of another object would give the best fix?
N a. 291° N b. 261° N c. 242° Y d. 196° 3020: A mooring buoy, if lighted, shows which color light?
N a. Yellow Y b. White N c. Blue N d. Any color except red or green 3055: A single line of position combined with a dead-reckoning position results in a(n) __________.
N a. running fix N b. fix Y c. estimated position N d. assumed position 3068: Which of the following data layer categories is NOT displayed on ECDIS?
N a. Notice to Mariners information N b. ECDIS warnings and messages Y c. Ship hydrodynamic information N d. Hydrographic Office data 3085: An ECDIS is required to display which information?
N a. Water temperature N b. Climatology data N c. Speed of advance Y d. Depth contours