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.
105: If the GMT is 1500, the time at 75°E longitude is __________.
N a. 1000 N b. 1500 N c. 1700 Y d. 2000 116: Which wind results from a land mass cooling more quickly at night than an adjacent water area?
N a. Coastal breeze N b. Sea breeze Y c. Land breeze N d. Mistral 244: To make sure of getting the full advantage of a favorable current, you should reach an entrance or strait at what time in relation to the predicted time of the favorable current?
N a. One hour after the predicted time N b. At the predicted time N c. 30 minutes before flood, one hour after an ebb Y d. 30 minutes before the predicted time 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 304: In order to remove index error from a sextant, you should adjust the __________.
N a. index mirror to make it parallel to the horizon glass with the index set at zero Y b. horizon glass to make it parallel to the index mirror with the index set at zero N c. horizon glass to make it parallel to the sextant frame N d. telescope to make it perpendicular to the sextant frame 312: The depth of water on a chart is indicated as 23 meters. This is equal to __________.
N a. 11.5 fathoms Y b. 12.6 fathoms N c. 69.0 feet N d. 78.6 feet 546: If it is impossible to avoid a hurricane in the Northern Hemisphere, the most favorable place to be when the storm passes is in __________.
N a. the dangerous semicircle N b. the eye (center) of the storm N c. that half of the storm lying to the right of the storm's path Y d. that half of the storm lying to the left of the storm's path 574: If your mercurial barometer reads 30.50 inches (1033 millibars) and the temperature is 56°F (13°C), what is the correct reading at 55°N, 150°W?
N a. 30.42 inches (1030 millibars) Y b. 30.45 inches (1031 millibars) N c. 30.50 inches (1032 millibars) N d. 30.53 inches (1033 millibars) 583: The radar control used to reduce sea return at close ranges is the __________.
N a. gain control Y b. sensitivity time control N c. fast time constant N d. pulse length control 588: You are underway on course 050°T and your maximum speed is 10 knots. The eye of a hurricane bears 100°T, 90 miles from your position. The hurricane is moving towards 285°T at 19 knots. If you maneuver at 10 knots to avoid the hurricane, what could be the maximum CPA?
N a. 39 miles N b. 45 miles Y c. 53 miles N d. 59 miles 592: To measure distance on a Mercator chart between the parallels of LAT 34°30'N and LAT 31°30'N, which 30 mile scale should be used?
N a. 33°00'N to 33°30'N N b. 32°30'N to 33°00'N Y c. 32°45'N to 33°15'N N d. 32°15'N to 32°45'N 691: Of the four light characteristics shown which one does NOT represent a safe water mark of the IALA Buoyage System? (D019NG )
Y a. A N b. B N c. C N d. D 712: Information about the pilotage available at Miami harbor may best be obtained from which publication?
N a. World Port Index N b. Sailing Directions N c. Pilot Chart Y d. United States Coast Pilot 802: Which is a weekly publication advising mariners of important matters affecting navigational safety?
N a. Light List Y b. Notice to Mariners N c. Coast Pilot N d. Sailing Directions 820: A position obtained by crossing lines of position taken at different times and advanced to a common time is a(n) __________.
N a. dead-reckoning position Y b. running fix N c. estimated position N d. fix 894: On a clear, warm day, you notice the approach of a tall cumulus cloud. The cloud top has hard well defined edges and rain is falling from the dark lower edge. Should this cloud pass directly overhead __________.
Y a. it will be preceded by a sudden increase in wind speed N b. it will be preceded by a sudden decrease in wind speed N c. the wind speed will not change as it passes N d. the wind will back rapidly to left in a counterclockwise direction as it passes 901: Under the IALA-A Buoyage System, a buoy indicating that the preferred channel is to port when entering from seaward, can have a __________.
N a. can shape N b. group-flashing (2) light N c. red-and-green vertical stripes Y d. green light 925: Your vessel is at the equator at midnight on 1 January, and a star is observed rising. At what time will this same star rise on 1 February, assuming your vessel's location is still at the equator?
N a. 2208 N b. 2110 Y c. 2158 N d. 2317 964: The thin, whitish, high clouds composed of ice crystals, popularly known as "mares' tails" are __________.
Y a. cirrus N b. cirrocumulus N c. altostratus N d. nimbostratus 1021: You are underway in the North Sea on course 142°T when you sight a buoy bearing 105°T. The buoy's white light has a characteristic of continuous very-quick flashing. To ensure that your vessel remains in the best navigable water you would __________.
N a. continue on course and ensure that the bearings change to the left N b. pass between the buoy and another buoy showing a fixed white light N c. alter course to port and pass the buoy close aboard to either side Y d. alter course to port and pass north of the buoy 1030: You are preparing a weather report form, WS Form B-80. The dry bulb thermometer reads 78°F, and the wet bulb thermometer reads 75°F. How would you encode the air temperature groups in the report? (D041NG )
Y a. 10256, 2023/ N b. 10780, 2074/ N c. 00256, 0023/ N d. 10256, 2074/ 1141: What is characteristic of an isophase light?
N a. 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse N b. 2 sec. flash, 5 sec. eclipse Y c. 1 sec. flash, 1 sec. eclipse N d. 6 sec. flash, 3 sec. eclipse 1188: The magnitude of three stars is indicated. Which star is the brightest?
N a. Antares + 1.2 N b. Altair + 0.9 Y c. Vega + 0.1 N d. Cannot be determined; magnitude indicates size not brightness 1214: The letter B in the diagram represents the __________. (D006NG )
N a. sensible horizon N b. visible horizon N c. celestial horizon Y d. geoidal horizon 1228: "An electronic or electric device that indicates the rate of turn of a vessel," defines a/an _____________ .
N a. magnetic compass N b. gyro-compass Y c. swing meter N d. odometer 1252: Port side daymarks may be __________.
Y a. numbered N b. octagonal N c. black and white N d. of any shape 1262: A safe water daymark has what shape?
N a. Triangular N b. Diamond N c. Circular Y d. Octagonal 1307: What will be the velocity of the tidal current southwest of Hunts Point, NY, at 0932 EST (ZD +5) on 16 March 1983?
N a. 0.9 knot Y b. 1.5 knots N c. 1.8 knots N d. 2.3 knots 1352: Weather observations provided by each weather station include all of the following except __________.
N a. temperature N b. visibility Y c. predicted weather for the next twelve hours N d. barometric pressure and change in the last three hours 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 1459: In a tropical cyclone, in the Northern Hemisphere, a vessel hove to with the wind shifting counterclockwise is __________.
N a. ahead of the storm center N b. in the dangerous semicircle Y c. in the navigable semicircle N d. directly in the approach path of the storm 1481: What is the approximate geographic range of Fenwick Island Light, Delaware, if your height of eye is 42 feet (12.8 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".
Y a. 18.3 nm N b. 15.4 nm N c. 13.1 nm N d. 10.3 nm 1518: Which publication requires infrequent corrections?
N a. List of Lights N b. Coast Pilot Y c. Sailing Directions (Planning Guide) N d. Radio Navigational Aids 1682: Which of the listed properties does warm air possess?
N a. It rises above cooler air and cools as it rises. N b. Atmospheric pressure drops as warm air rises. N c. Moisture in warm air condenses as the air is cooled. Y d. All of the above 1712: Tornados are often associated with __________.
N a. winds in the warm sector ahead of a cold front and travel from southwest towards the east or northeast N b. squall lines and very heavy thunderstorm activity N c. winds that may be in excess of 200 knots and destructive funnel clouds Y d. All of the above 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1715: The hurricane season generally occurs from __________.
N a. August to January N b. July to December Y c. June to November N d. January to June 1737: You can determine if your vessel's position is in the dangerous or navigable semicircle of a hurricane by __________.
N a. observing whether the wind is veering or backing N b. plotting two or more recent storm positions from weather bulletins Y c. Both A and B N d. Neither A nor B 1794: Why are low altitude sun sights not generally used?
Y a. Errors due to unusual refraction may exist. N b. Sextants may have large errors at small angles of elevation. N c. Modern sight reduction tables are not complete for low altitudes below 5°. N d. The glare on the horizon causes irradiation errors. 1799: The letter D in illustration D006NG represents the __________.
N a. celestial horizon N b. visible horizon Y c. geometrical horizon N d. geoidal horizon 1900: A parallax correction is NOT applied to observations of the __________.
Y a. stars N b. Moon N c. Sun N d. Planets 1900: A parallax correction is NOT applied to observations of the __________.
Y a. stars N b. Moon N c. Sun N d. Planets 1974: Ocean currents are well defined and __________.
N a. create large waves in the direction of the current N b. change direction 360° during a 24 hour period Y c. remain fairly constant in direction and velocity throughout the year N d. are characterized by a light green color 2022: The GP of a body for a high altitude sight is determined from the declination and the __________.
N a. right ascension N b. sidereal hour angle Y c. Greenwich hour angle N d. observed altitude 2042: At morning stars, the last stars that should be observed are those with an azimuth in which quadrant?
N a. Eastern N b. Southern Y c. Western N d. Northern 2090: You are underway in an area where the charted depth is 8 fathoms. You compute the height of tide to be -4.0 feet. The draft of your vessel is 5.0 feet (1.52 meters). You determine the depth of the water beneath your keel to be __________.
Y a. 39 feet (11.9 meters) N b. 43 feet (13.1 meters) N c. 47 feet (14.3 meters) N d. 57 feet (17.4 meters) 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. 2175: 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, which light(s) will be shown at D if the lock walls and piers are not awash?
N a. One amber light Y b. One red light N c. Two red lights N d. Three red lights 2178: The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval?
N a. They are not subject to permanent magnetism; no check is necessary. N b. Semiannually Y c. Annually N d. Every five years 2189: A vessel is heading magnetic north and its magnetic compass indicates a heading of 003°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends are to port and the athwartships tray is at the bottom, you should add some more magnets. N b. If the blue ends are to port and the athwartships tray is at the top, you should add some more magnets. N c. If the red ends are to port, you should lower the athwartships tray. Y d. If the red ends are to port and the tray is at the bottom, you should raise the tray. 2261: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
N a. running fix N b. fix N c. dead-reckoning position Y d. estimated position 2289: The constellation that contains the pointer stars is __________.
N a. Orion Y b. Ursa Major N c. the Southern Cross N d. Pegasus 2340: What is a "Special Warning"?
N a. An urgent message concerning a vessel in distress N b. A weather advisory about unusual meteorological or oceanographic phenomena hazardous to vessels Y c. A broadcast disseminating an official government proclamation affecting shipping N d. A radio navigational warning concerning a particularly hazardous condition affecting navigation 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 2526: What is the equivalent of 10 min. 52 sec. in arc units?
N a. 0°47' N b. 1°12' Y c. 2°43' N d. 3°52' 2694: What is the equivalent of 10°48' in time units?
N a. 2 min. 39 sec. N b. 20 min. 12 sec. Y c. 43 min. 12 sec. N d. 50 min. 12 sec. 2777: A sailing chart could have a scale of __________.
N a. not more than 1:25,000 N b. 1:35,000 N c. 1:100,000 Y d. 1:700,000 2882: While upbound through Memphis, the weather report on TV news indicates that a warm front is stationary over the Kentucky - Missouri - Tennessee areas. What weather conditions should you expect?
N a. Strong, gusting winds from the NW with thundershowers N b. Light winds from the northeast with clear skies N c. A "blue norther" Y d. Southerly winds with steady rain; fog or overcast 2909: A nun buoy is indicated by which letter in illustration D044NG?
N a. A N b. B N c. C Y d. D 3057: IN REGION A of the IALA Buoyage System, when entering from seaward, the starboard side of a channel would be marked by a __________.
Y a. green conical buoy N b. green can buoy N c. red can buoy N d. red conical buoy