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.
46: What wind reverses directions seasonally?
Y a. Monsoon winds N b. Hooked trades N c. Jet stream N d. Secondary winds 78: A single line of position combined with a dead-reckoning position results in a(n) __________.
N a. assumed position Y b. estimated position N c. fix N d. running fix 186: In the doldrums you will NOT have __________.
N a. high relative humidity N b. frequent showers and thunderstorms Y c. steep pressure gradients N d. frequent calms 230: If the LORAN-C ground wave does NOT extend out as far as the skywave skip distance, there will be a skip zone in which __________.
Y a. no LORAN-C signal is received N b. only ground waves are received N c. only skywaves are received N d. both ground waves and skywaves are received 235: When the equation of time is taken from the Nautical Almanac for use in celestial navigation, it is used to determine __________.
N a. zone time N b. sunrise Y c. time of local apparent noon N d. local mean time 249: When using GPS, how many theoretical position lines are required for a three-dimensional fix that takes into account altitude?
N a. 1 N b. 2 N c. 3 Y d. 4 273: Loran-C is which type of navigation system?
Y a. Hyperbolic, long-range navigation system N b. Short-range electronic N c. Long-range, high frequency navigation system N d. Long-range, with a frequency of 1950 kHz 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 426: The wind speed and direction observed from a moving vessel is known as __________.
N a. coordinate wind N b. true wind Y c. apparent wind N d. anemometer wind 436: A wind vane on a moving vessel shows __________.
N a. dead reckoning wind direction N b. true wind direction Y c. apparent wind direction N d. estimated wind direction 446: The usual sequence of directions in which a tropical cyclone moves in the Southern Hemisphere is __________.
N a. northwest, west, and south Y b. southwest, south, and southeast N c. north, northwest, and east N d. west, northwest, and north 477: Determine the height of the tide at 1430 EST (ZD +5) at New Bedford, MA, on 10 April 1983.
N a. 1.1 feet N b. 1.2 feet Y c. 1.4 feet N d. 1.7 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 494: Aneroid barometers are usually calibrated to indicate atmospheric pressure in __________.
N a. inches of mercury and centimeters N b. feet of mercury and millibars N c. inches of mercury and millimeters Y d. inches of mercury and millibars 557: Your vessel has a draft of 23 feet. On 23 June 1983 you wish to pass over a temporary obstruction near Beaufort, SC, that has a charted depth of 22 feet. Allowing for a safety margin of 3 feet, what is the earliest time after 1600 DST (ZD +4) that this passage can be made?
Y a. 1750 N b. 1815 N c. 1855 N d. 1944 569: A line of position formed by sighting two charted objects in line is called a(n) __________.
N a. relative bearing Y b. range line N c. track line N d. estimated position 584: The correction(s) which must be applied to an aneroid barometer reading include(s) __________.
Y a. height error N b. gravity error N c. temperature error N d. All of the above 663: You are underway at 10 knots. At 1800 you note a radar contact dead ahead at a range of 10 miles. At 1812 the contact is dead ahead at a range of 8 miles. The estimated speed of the contact is __________.
Y a. dead in the water N b. 5 knots N c. 10 knots N d. 15 knots 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 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 734: You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?
N a. 1.0 mile Y b. 1.5 miles N c. 2.0 miles N d. 2.5 miles 755: The sidereal day begins when the __________.
N a. Sun is over the lower branch of the reference meridian N b. Sun is over the upper branch of the reference meridian N c. first point of Aries is over the lower branch of the reference meridian Y d. first point of Aries is over the upper branch of the reference meridian 942: Light Lists for coastal waters are __________.
N a. published every year and require no corrections N b. published every second year and must be corrected N c. published every five years and require no correction Y d. accurate thru NM number on title page and must be corrected 991: You are underway in the North Sea on course 328°T when you sight a buoy broad on your port bow. You are in the best navigable water if the buoy __________.
N a. has a topmark of two cones with points down N b. is a western quadrant buoy N c. is painted yellow on the top half and black on the bottom Y d. exhibits a light with the characteristic of VQ(3)5s 997: A coastal current __________.
N a. is generated by waves striking the beach Y b. flows outside the surf zone N c. flows in a circular pattern N d. is also known as a longshore current 1106: The legend/symbol which designates an occluded front is represented by a __________.
N a. red line Y b. purple line N c. blue line N d. dashed blue line 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 1158: What type of cloud is indicated by the number 5 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Cirrocumulus Y c. Altocumulus N d. Nimbostratus 1159: Two navigational hazards are located near to each other, but each is marked by an individual cardinal buoyage system. The buoys of one cardinal system may be identified from the other system by __________.
N a. the differing light colors N b. one system having odd numbers while the other system has even numbers N c. one system using horizontal bands while the other system uses vertical stripes Y d. the difference in the periods of the light 1206: Brief, violent showers frequently accompanied by thunder and lightning are usually associated with __________.
N a. passage of a warm front Y b. passage of a cold front N c. winds shifting counterclockwise in the Northern Hemisphere N d. stationary high pressure systems 1246: What weather change accompanies the passage of a cold front in the Northern Hemisphere?
N a. Wind shift from northeast clockwise to southwest N b. Steady dropping of barometric pressure N c. Steady precipitation, gradually increasing in intensity Y d. A line of cumulonimbus clouds 1261: A light having characteristics which include color variations is defined as __________.
N a. switching Y b. alternating N c. oscillating N d. fluctuating 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 1390: The fog most commonly encountered at sea is called __________.
N a. conduction fog N b. radiation fog N c. frontal fog Y d. advection fog 1461: The chart indicates the variation was 3°45'W in 1988, and the annual change is decreasing 6'. If you use the chart in 1991 how much variation should you apply?
Y a. 3°27'W N b. 3°27'E N c. 4°03'W N d. 4°03'E 1595: The Light List indicates that a light has a nominal range of 8 miles and is 48 feet(14.6 meters) high. If the visibility is 6 miles and your height of eye is 35 feet(10.7 meters), at what approximate distance will you sight the light?
N a. 15.0 nm N b. 12.4 nm N c. 8.0 nm Y d. 5.9 nm 1617: The inner cloud bands of a hurricane, when viewed from a distance, form a mass of dense, black cumulonimbus clouds called the __________.
Y a. bar of the storm N b. eye of the storm N c. funnel N d. front 1641: The low, dark, sheet-like cloud which is associated with continuous precipitation for many hours is a __________.
N a. cirrus cloud N b. cumulus cloud N c. cumulonimbus cloud Y d. nimbostratus cloud 1642: Which type of cloud formation should be of immediate concern to small craft operators?
N a. cirrus N b. altostratus N c. nimbostratus Y d. cumulonimbus 1736: Which statement is FALSE concerning the dangerous semicircle of a hurricane?
N a. The actual wind speed is increased by the forward movement of the storm along its track N b. the direction of the wind and the sea might carry a vessel directly into the storm's path N c. The seas are higher Y d. The rain is heavier 1751: A tsunami is caused by a(n) __________.
N a. tidal wave N b. storm surge caused by a hurricane or tropical storm Y c. earthquake on the ocean's floor N d. tornado 1832: Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic northeast or magnetic southeast?
N a. Flinders bar N b. Heeling magnets N c. Fore-and-aft magnets Y d. Quadrantal spheres 1936: The parallel of latitude at 66°33'N is the __________.
N a. Tropic of Cancer N b. Tropic of Capricorn Y c. Arctic Circle N d. ecliptic 2054: The diagram is of a fixed C of E lock and dam. What navigational light(s) is(are) exhibited at the position indicated by the letter B? (D038NG )
N a. One red light N b. Two green lights N c. Three green lights Y d. No lights 2128: 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 B if the lock walls and piers are not awash?
Y a. Three red lights N b. Two red lights N c. One red lights N d. No lights 2279: Antares is found in what constellation?
Y a. Scorpio N b. Corvus N c. Libra N d. Corona Borealis 2290: Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________.
Y a. deviation N b. variation N c. local attraction N d. All of the above 2322: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken?
N a. Use the fore-and-aft magnets and adjust the compass until it reads 358°. Y b. Use the athwartships magnets and adjust the compass until it reads 358°. N c. Use the fore-and-aft magnets and adjust the compass until it reads 000°. N d. Use the quadrantal spheres and adjust the compass until it reads 000°. 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. 2418: While proceeding downriver, you sight a red triangular-shaped daymark on the left bank. Under the U.S. Aids to Navigation System on the Western Rivers this is a __________.
N a. special purpose signal Y b. passing daymark N c. mark with no lateral significance N d. crossing daymark 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 2674: In the U.S. Aids to Navigation System on the Western Rivers, a preferred channel buoy to be left to port while proceeding downstream will __________.
N a. have the upper band red N b. show a red light if lighted N c. have a characteristic of composite group flashing if lighted Y d. All of the above 2707: You will find information about the duration of slack water in the __________.
Y a. Tidal Current Tables N b. Tide Tables N c. American Practical Navigator N d. Sailing Directions 2932: If the main channel under a bridge is marked with lights of the lateral system the adjacent bridge piers should be marked with __________.
N a. occulting white lights Y b. fixed yellow lights N c. fixed white lights N d. flashing yellow lights 2964: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
N a. Ship No. 1 does not paint as an individual target due to the side lobe affect. N b. The small island is not detected due to the limitation caused by the pulse length. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. Y d. Ship No. 2 is not detected due to the combined affects of beam width and pulse length. 2973: You should plot a dead reckoning position after every __________.
N a. course change N b. speed change N c. fix or running fix Y d. All of the above 3023: You have steadied up on a range dead ahead in line with your keel. After a few minutes the range, still dead ahead, appears as shown. Which action do you take? (D047NG )
Y a. Alter heading to the left N b. Alter heading to the right N c. Increase speed N d. Maintain heading, keeping the range dead ahead 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 3060: What information is NOT found in the chart title?
N a. Survey information N b. Scale Y c. Date of first edition N d. Projection 3113: With respect to automatic identification systems (AIS), which information is required to be broadcast every 1 to 10 seconds?
N a. Call sign N b. Vessel's draft N c. Route plan Y d. None of the above