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.
12: Lines on a chart which connect points of equal magnetic variation are called __________.
N a. magnetic latitudes N b. magnetic declinations N c. dip Y d. isogonic lines 19: You are approaching a swing bridge at night. You will know that the bridge is open for river traffic when __________.
N a. the fixed, green light starts to flash N b. the amber light changes to green N c. the red light is extinguished Y d. the red light changes to green 81: A buoy with a composite group-flashing light indicates a(n) __________.
Y a. bifurcation N b. fish net area N c. anchorage area N d. dredging area 88: Which position includes the effects of wind and current?
N a. Dead reckoning position N b. Leeway position Y c. Estimated position N d. Set position 97: The lunar or tidal day is __________.
N a. about 50 minutes shorter than the solar day Y b. about 50 minutes longer than the solar day N c. about 10 minutes longer than the solar day N d. the same length as the solar day 111: Green lights may appear on __________.
Y a. horizontally banded buoys N b. vertically striped buoys N c. yellow buoys N d. spherical buoys 113: The type of transmission used in Loran-C is a __________.
N a. single pulse N b. wide pulse Y c. multipulse N d. narrow pulse 133: The line connecting the Loran-C master station with a secondary station is called the __________.
N a. focus line Y b. base line N c. side line N d. center line 185: A ship is in longitude 54°00'W on a true course of 270°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?
N a. 45°00'W N b. 52°30'W N c. 60°00'W Y d. 67°30'W 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 240: 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 N b. when there is a following current Y c. at slack water N d. at flood 259: The Illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "Q" represents a __________. (D042NG )
N a. convergence zone N b. squall line Y c. convergence line N d. weather boundary 291: A buoy marking a wreck will show a(n) __________.
Y a. white light FL (2) and a topmark of 2 black spheres N b. occulting green light and may be lettered N c. yellow light and will be numbered N d. continuous quick white light and may be numbered 299: Steady precipitation is typical of __________.
N a. coming cold weather conditions Y b. a warm front weather condition N c. high pressure conditions N d. scattered cumulus clouds 319: The Illustration shows the symbols used by radio facsimile weather charts. The symbol indicated at letter "F" represents a __________. (D042NG )
N a. maritime air mass Y b. weather boundary N c. convergence zone N d. squall line 389: The edge of a hurricane has overtaken your vessel in the Gulf of Mexico, and the northwest wind of a few hours ago has shifted to the west. This is an indication that you are located in the __________.
Y a. navigable semicircle N b. dangerous semicircle N c. low pressure area N d. eye of the storm 398: The velocity of the apparent wind can be less than the true wind and from the same direction, if certain conditions are present. One condition is that the __________.
N a. ship's speed is more than the true wind velocity Y b. true wind is from dead astern N c. true wind is on the beam N d. true wind is from dead ahead 406: Your vessel is on course 135°T, speed 18 knots. From the appearance of the sea you estimate the speed of the true wind as 24.5 knots. The apparent wind is 40° on the starboard bow. Determine the speed of the apparent wind.
N a. 24.2 knots N b. 28.4 knots N c. 32.2 knots Y d. 36.0 knots 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) 544: The instrument most commonly used to gather the data for determining the relative humidity is the __________.
N a. hydrometer Y b. psychrometer N c. barometer N d. anemometer 581: The Captain of the Port has closed to navigation, and buoyed, a section of a harbor. These buoys would be painted __________.
N a. red or green to conform with the other lateral aids N b. red and green horizontally-striped N c. solid yellow Y d. white with orange markings 607: The charted depth alongside the south face of Mystic Pier, Charlestown, MA, is 35 feet. Your maximum draft is 38 feet. You wish to have 2 feet under the bottom, on a rising tide, when you go alongside to discharge a heavy lift. What is the earliest time after 0900 EST (ZD +5), on 2 February 1983, that you can dock?
N a. 1020 N b. 1050 N c. 1127 Y d. 1137 620: Chart legends which indicate a conspicuous landmark are printed in __________.
Y a. capital letters N b. italics N c. boldface print N d. underlined letters 686: The pressure gradient between the horse latitudes and doldrums runs __________.
N a. east to west Y b. north to south N c. northeast to southwest N d. northwest to southeast 716: Standard atmospheric pressure in inches of mercury is __________.
N a. 30.00 N b. 28.92 Y c. 29.92 N d. 29.00 791: Under the IALA Buoyage Systems, the topmark of a red and white vertically-striped buoy shall be __________.
N a. X-shaped N b. two black spheres Y c. a single red sphere N d. a single red cone 806: Temperature and moisture characteristics are modified in a warm or cold air mass due to __________.
N a. pressure changes in the air mass Y b. movement of the air mass N c. the heterogeneous nature of the air mass N d. upper level atmospheric changes 807: The approximate mean position of the axis of the Gulf Stream east of Palm Beach, FL, is __________.
N a. 35 nautical miles N b. 25 nautical miles Y c. 15 nautical miles N d. 5 nautical miles 913: How many points are there in a compass card?
N a. 4 N b. 8 N c. 24 Y d. 32 934: Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are __________.
N a. cirrus N b. cirrostratus N c. altostratus Y d. cirrocumulus 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/ 1073: Chart legends printed in capital letters show that the associated landmark is __________.
N a. inconspicuous N b. a radio transmitter Y c. conspicuous N d. a government facility or station 1080: Information on northern right whales can be found in __________.
Y a. the Coast Pilot N b. HO 229 N c. the Nautical Almanac N d. Ship's Medicine Chest and Medical Aid at Sea 1202: As shown in the illustration, which wind speeds are reported at position A? (D049NG )
N a. 10 knots Y b. 15 knots N c. 20 knots N d. 25 knots 1302: What feature(s) of a daymark is (are) used to identify the beacon upon which it is mounted?
Y a. Color and shape N b. Size N c. Method of construction N d. Signal characteristics 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 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 1401: The maximum distance at which a light may be seen under existing visibility conditions is called __________.
N a. nominal range Y b. luminous range N c. charted range N d. geographic range 1421: What is the approximate geographic visibility of an object with a height above the water of 70 feet, for an observer with a height of eye of 65 feet?
N a. 16.8 nm Y b. 19.0 nm N c. 20.6 nm N d. 22.4 nm 1428: The speed of sound in water is approximately __________.
N a. 1.5 times its speed in air N b. 2.5 times its speed in air N c. 3.5 times its speed in air Y d. 4.5 times its speed in air 1454: Atmospheric pressure may be measured with a(n) __________.
N a. barograph N b. aneroid barometer N c. mercurial barometer Y d. All of the above 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 1557: A Doppler log in the volume reverberation mode indicates __________.
N a. speed being made good Y b. speed through the water N c. the set of the current N d. the depth of the water 1607: When your barometer reading changes from 30.25 to 30.05 in a 12-hour period it indicates __________.
N a. rapidly changing weather N b. improving weather N c. high winds within the next six hours Y d. little or no immediate change 1613: Where would you find information concerning the duration of slack water?
N a. Tide Tables Y b. Tidal Current Tables N c. American Practical Navigator N d. Sailing Directions 1984: When a dual purpose marking is used, the mariner following the Intracoastal Waterway should be guided by the __________.
N a. color of the aid N b. shape of the aid N c. color of the top band Y d. shape of the yellow mark 1987: An instrument useful in predicting fog is the __________.
Y a. sling psychrometer N b. microbarograph N c. anemometer N d. aneroid barometer 2062: The Illustration represents a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter F in the illustration? (D038NG )
Y a. One red light N b. Two red lights N c. Two green lights N d. Three green lights 2084: You are approaching Gallipolis Lock and Dam. The traffic signal light is flashing red. You should __________.
Y a. hold your position and not attempt to enter the lock N b. approach the lock slowly under full control N c. proceed at normal speed to enter the lock N d. None of the above 2125: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon N b. lighted buoy Y c. 5-fathom curve N d. prohibited area 2161: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 58s at the 1500 GMT time tick. What is the chronometer error?
N a. 03h 01m 58s fast Y b. 01m 58s fast N c. +2s N d. -2s 2375: The shortest distance between any two points on earth defines a __________.
N a. small circle Y b. great circle N c. rhumb line N d. hyperbola 2382: What causes geocentric parallax?
N a. The varying distance between the Earth and Moon. Y b. The change in the Moon's position relative to the stars when viewed from the Earth's surface, as compared to the Earth's center. N c. The rapid change in declination of the Moon causes a rotational oscillation of its axis. N d. The nearness of the Moon causes an apparent increase in diameter as its altitude increases. 2580: The angle at the pole measured through 180°From the prime meridian to the meridian of a point is known as __________.
N a. the departure N b. the polar arc Y c. longitude N d. Greenwich hour angle 2612: The dividing meridian between zone descriptions -7 and -8 is __________.
Y a. 112°30'E N b. 118°30'E N c. 120°00'E N d. 116°30'W 2618: You must draw a plotting sheet covering latitudes 38°N to 43°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 inches, what is the distance between latitude 38°N and latitude 43°N?
N a. 29.0 inches N b. 29.6 inches N c. 32.1 inches Y d. 32.8 inches 2730: When attempting an upstream landing while pushing empty barges ahead in a hard onshore wind, the approach is best made __________.
Y a. with bow out, stern in N b. with bow in, stern out N c. parallel to the dock, as close in as possible N d. parallel to the dock, as far out as possible 2891: Twenty-three meters equals __________.
N a. 17.50 feet Y b. 75.46 feet N c. 96.00 feet N d. 104.99 feet 2979: You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
N a. 013° Y b. 082° N c. 176° N d. 201°