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.
135: The standard meridian for the time zone +1 is __________.
N a. 0° N b. 7 1/2°W Y c. 15°W N d. 7 1/2°E 145: The standard time meridian for zone description -1 is __________.
N a. 0° N b. 7 1/2°W N c. 7 1/2°E Y d. 15°E 198: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the time to intercept if you make 9 knots?
N a. 7h 44m N b. 7h 12m Y c. 6h 43m N d. 6h 08m 204: Because of the reflecting properties of a sextant, if the sextant altitude reads 60° on the limb, the actual arc of the limb from 0° to the 60° reading is __________.
N a. 20° Y b. 30° N c. 40° N d. 60° 219: The predicted time that the flood begins at the entrance to Delaware Bay is 1526. You are anchored off Chestnut St. in Philadelphia. If you get underway bound for sea at 1300 and turn for 13 knots, at what point will you lose the flood current?
N a. Mile 52 N b. New Castle N c. Marcus Hook Y d. Billingsport 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 365: The Sun at a maximum declination north would be approximately at __________.
Y a. aphelion N b. perihelion N c. autumnal equinox N d. first point of Aries 395: If the Sun's observed altitude is 27°12', the zenith distance is __________.
Y a. 62°48' N b. 27°12' N c. 152°48' N d. 43°12' 444: A sylphon cell is a part of a __________.
N a. maximum thermometer Y b. barograph N c. thermograph N d. hygrometer 484: The needle of an aneroid barometer points to 30.05 on the dial. This indicates that the barometric pressure is __________.
Y a. 30.05 inches of mercury N b. 30.05 millimeters of mercury N c. 30.05 millibars N d. falling 549: On a working copy of a weather map, an occluded front is represented by which color line?
N a. Red N b. Blue N c. Alternating red and blue Y d. Purple 626: What indicates the arrival of a hurricane within 24 to 36 hours?
N a. The normal swell becoming lower and from a steady direction N b. Long bands of nimbostratus clouds radiating from a point over the horizon N c. The barometer drops 2 millibars between 1000 and 1600 Y d. Unusually good weather with above average pressures followed by a slow fall of 4 millibars in six hours 682: Which table is NOT found in the U.S. Coast Pilots?
N a. Climatological table Y b. Luminous range table N c. Meteorological table N d. Coastwise distance table 749: You are enroute to assist vessel A. Vessel A is underway at 4.5 knots on course 233°T, and bears 264°T at 68 miles from you. What is the course to steer at 13 knots to intercept vessel A?
N a. 249° Y b. 256° N c. 262° N d. 268° 760: As a vessel changes course to starboard, the compass card in a magnetic compass __________.
N a. first turns to starboard then counterclockwise to port N b. also turns to starboard Y c. remains aligned with compass north N d. turns counterclockwise to port 783: Magnetism which is present only when the material is under the influence of an external field is called __________.
N a. permanent magnetism Y b. induced magnetism N c. residual magnetism N d. terrestrial magnetism 926: When a low pressure area is approaching, the weather generally __________.
N a. improves Y b. worsens N c. remains the same N d. is unpredictable 976: The atmosphere in the vicinity of a high pressure area is called a(n) __________.
Y a. anticyclone N b. cold front N c. occluded front N d. cyclone 1010: What is a characteristic of a rhumb line?
N a. It is the shortest distance between two points on the Earth. N b. It plots as a straight line on a Lambert conformal chart. Y c. It cuts each meridian at the same angle. N d. The course angle constantly changes to form the loxodromic curve. 1085: A chart position enclosed by a semi-circle is a(n) __________.
N a. fix N b. estimated position Y c. dead reckoning position N d. running fix 1085: A chart position enclosed by a semi-circle is a(n) __________.
N a. fix N b. estimated position Y c. dead reckoning position N d. running fix 1116: When a cold air mass and a warm air mass meet, and there is no horizontal motion of either air mass, it is called a(n) __________.
N a. cold front N b. occluded front Y c. stationary front N d. warm front 1134: The Earth's irregular heating is caused by __________.
N a. the time of day N b. the seasons N c. geography Y d. All of the above 1145: The GHA of a star __________.
Y a. increases at a rate of approximately 15° per hour N b. increases at a rate of approximately 4° per hour N c. decreases at a rate of approximately 15° per hour N d. decreases at a rate of approximately 4° per hour 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. 1223: The difference between magnetic heading and compass heading is called __________.
N a. variation Y b. deviation N c. compass error N d. drift 1245: You can follow the approach of a dangerous cyclonic storm by inspecting __________.
Y a. a newspaper, a weather map, a weather fax, or a weather forecast N b. the National Weather Service Observing Handbook No.1, Marine Surface Observations N c. the Coast Pilot or Sailing Directions N d. the sky overhead 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 1253: The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________.
Y a. deviation N b. variation N c. compass error N d. dip 1365: The same side of the Moon is always toward the Earth, but more than half of its surface has been seen due to libration. Libration in latitude occurs because __________.
Y a. the axis of rotation is tilted about 6.5° to the axis of revolution N b. the speed of revolution varies, while the rotational speed is essentially constant N c. of the rotational oscillation of the Moon with respect to its radius vector N d. of augmentation 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 1476: When warm moist air blows over a colder surface and is cooled below its dew point, the result is __________.
N a. radiation fog N b. ice fog Y c. advection fog N d. frost smoke 1548: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "K" represents a __________. (D042NG )
Y a. hurricane N b. thunderstorm N c. convergence zone N d. convergence line 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 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 1631: Which picture shows an occulting light? (D034NG )
N a. A Y b. B N c. C N d. D 1648: A sign of thunderstorm development is a cumulus cloud __________.
N a. darkening, growing in size and forming an anvil top N b. that shows extensive vertical development N c. creating cold downdrafts that are felt on the ground Y d. All of the above 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. 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 1801: A phenomenon where the atmospheric pressure is higher than that of other surrounding regions is called __________.
N a. the "trade winds" Y b. an anticyclone N c. a low front or an occluded front N d. the "doldrums" 1885: Under the Uniform State Waterway Marking System a mooring buoy is painted __________.
Y a. white with a blue band N b. yellow N c. any color that does not conflict with the lateral system N d. white with a green top 1919: The nadir is the point on the celestial sphere that is __________.
N a. 90° away from the zenith N b. over Greenwich N c. on the western horizon Y d. directly below the observer 1952: The Moon is subject to four types of libration. Which of the following is NOT one of these types of libration?
N a. Libration in longitude Y b. Geocentric libration N c. Diurnal libration N d. Physical libration 1988: The parallel of latitude at 23°27'N is the __________.
Y a. Tropic of Cancer N b. Tropic of Capricorn N c. Arctic Circle N d. ecliptic 2019: At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?
N a. Southern Y b. Western N c. Northern N d. Eastern 2099: 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. Y b. Continue on course until the range is closed, then alter course to the right. N c. Immediately alter course to the right to bring the range in line. N d. Immediately alter course to 309°T. 2130: You are underway and pass by a lighthouse. Its light, which was white since you first sighted it, changes to red. This means __________.
N a. the light is characterized as alternately flashing N b. the lighthouse has lost power and has switched to emergency lighting N c. it is the identifying light characteristic of the lighthouse Y d. you have entered an area of shoal water or other hazard 2132: What is the definition of height of tide?
N a. The vertical difference between the heights of low and high water N b. The vertical difference between a datum plane and the ocean bottom Y c. The vertical distance from the tidal datum to the level of the water at any time N d. The vertical distance from the surface of the water to the ocean floor 2258: The primary use of apparent time in marine navigation is to __________.
N a. calculate sunrise or sunset N b. determine zone time N c. enter an almanac Y d. determine the time of meridian transit 2361: The range of tide is the __________.
N a. maximum depth of the water at high tide N b. duration of time between high and low tide N c. distance the tide moves out from the shore Y d. difference between the heights of high and low tide 2370: In the United States, short-range radio navigational warnings are broadcast by the __________.
Y a. Coast Guard N b. Corps of Engineers N c. NOAA N d. harbor master of the nearest port 2428: If your vessel were proceeding up river (ascending), the port side of the channel would be marked according to the U. S. Aids to Navigation System on the Western Rivers by __________.
Y a. green can buoys N b. red can buoys N c. green nun buoys N d. red nun buoys 2458: In the U.S. Aids to Navigation System on the Western Rivers, the light characteristic of group flashing (2) is used for lights on __________.
N a. the right descending bank Y b. the left descending bank N c. preferred channel buoys N d. daymarks with no lateral significant 2478: On 23 August 1981 you observe a back sight of the lower 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' on the arc. What is the observed altitude (Ho)?
Y a. 63°42.0' N b. 63°38.0' N c. 63°19.4' N d. 62°49.6' 2626: What information is found in the chart title?
N a. Date of the first edition N b. Date of the edition and, if applicable, the revision Y c. Information on the sounding datum N d. Information on which IALA buoyage system applies 2627: Stormy weather is usually associated with regions of __________.
N a. high barometric pressure Y b. low barometric pressure N c. steady barometric pressure N d. changing barometric pressure 2676: The place where a channel moves from along one bank of the river over to the other bank of the river is called a __________.
N a. draft N b. cutoff N c. draw Y d. crossing 2710: In the horizon system of coordinates what is equivalent to the local hour angle of the celestial equator system?
N a. Altitude Y b. Azimuth N c. Zenith distance N d. Colongitude 3084: An ECDIS is required to display which information?
Y a. Soundings N b. Waypoints N c. Meteorological data N d. Radar targets 3123: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. N b. AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area. Y c. AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels, aircraft and shore stations within the area. N d. AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels, aircraft and shore stations within the area.