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.
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 125: The GMT is 0445 and your zone description is +1. Your zone time is __________.
N a. 0445 Y b. 0345 N c. 0545 N d. 1545 221: In United States waters, a buoy having red and white vertical stripes has a light characteristic of __________.
N a. group occulting Y b. Morse (A) N c. interrupted quick flashing N d. quick flashing 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 323: The position accuracy of Loran-C degrades with increasing distance from the transmitting stations as __________.
N a. gains are made over the signal path Y b. a result of variation in propagation conditions N c. the frequency of the pulses increases N d. the stations shift pulses 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 394: An instrument designed to maintain a continuous record of atmospheric pressure is a(n) __________.
N a. mercurial barometer N b. aneroid barometer Y c. barograph N d. thermograph 545: The arc of a great circle which passes through the body and celestial poles is part of the __________. (D007NG )
Y a. hour circle N b. diurnal circle N c. observer's meridian N d. altitude circle 669: It is desirable that a vessel encountering hurricane or typhoon conditions sends weather reports to the closest meteorological service at least every __________.
N a. hour Y b. 3 hours N c. 6 hours N d. 8 hours 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 687: The drift and set of tidal, river, and ocean currents refer to the __________.
N a. position and area of the current Y b. speed and direction toward which the current flows N c. type and characteristic of the current's flow N d. None of the above 690: What level of development of a tropical cyclone has a hundred mile radius of circulation, gale force winds, less than 990 millibars of pressure and vertically formed cumulonimbus clouds?
N a. A tropical disturbance N b. A tropical depression Y c. A tropical storm N d. A typhoon 744: A hand held instrument used to measure distances between objects and the ship is a __________.
N a. vernier N b. psychrometer N c. hygrometer Y d. stadimeter 773: What is the basic principle of the magnetic compass?
Y a. Magnetic materials of the same polarity repel each other and those of opposite polarity attract. N b. The Earth's magnetic lines of force are parallel to the surface of the Earth. N c. Magnetic meridians connect points of equal magnetic variation. N d. The compass needle(s) will, when properly compensated, lie parallel to the isogonic lines of the Earth. 880: You are taking bearings on two known objects ashore. The BEST fix is obtained when the angle between the lines of position is __________.
N a. 60° Y b. 90° N c. 45° N d. 30° 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 920: What is the average speed of the movement of a hurricane following the recurvature of its track?
N a. 5 to 10 knots Y b. 20 to 30 knots N c. 40 to 50 knots N d. Over 60 knots 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 1002: What publication contains information about the port facilities in Cadiz, Spain?
Y a. World Port Index N b. United States Coast Pilot N c. Nautical Index N d. Sailing Directions 1043: You are about to go to sea and adjust the magnetic compass. To expedite the adjustment at sea, in what order should the following dockside adjustments be made?
N a. Flinders bar first, then the heeling magnet and spheres N b. Heeling magnet first, then the Flinders bar and spheres Y c. Flinders bar first, then the spheres and heeling magnet N d. Spheres first, then the Flinders bar and heeling magnet 1173: When adjusting a magnetic compass for error, a deviation table should be made __________.
N a. before correcting for any deviation N b. after correcting for variation Y c. after adjusting the fore-and-aft and athwartships permanent magnets N d. before the quadrantal correctors are placed on the compass 1205: How is the annual rate of change for magnetic variation shown on a pilot chart?
Y a. Gray lines on the uppermost inset chart N b. Red lines on the main body of the chart N c. In parenthesis on the lines of equal magnetic variation N d. Annual rate of change is not shown. 1205: How is the annual rate of change for magnetic variation shown on a pilot chart?
Y a. Gray lines on the uppermost inset chart N b. Red lines on the main body of the chart N c. In parenthesis on the lines of equal magnetic variation N d. Annual rate of change is not shown. 1293: Deviation is caused by __________.
N a. changes in the earth's magnetic field N b. nearby magnetic land masses or mineral deposits Y c. magnetic influence inherent to that particular vessel N d. the magnetic lines of force not coinciding with the lines of longitude 1300: You are approaching a sea buoy which emits a racon signal. This signal is triggered by which type of radar?
Y a. 3 cm N b. 10 cm N c. Both 3 cm and 10 cm N d. Signal does not depend on radar type. 1353: The difference in degrees between true north and magnetic north is called __________.
Y a. variation N b. deviation N c. drift N d. compass error 1374: On a working copy of a weather map, a warm front is represented by what color line?
Y a. Red N b. Blue N c. Alternating red and blue N d. Purple 1385: What is the length of the lunar day?
Y a. 24h 50m 00s N b. 24h 00m 00s N c. 23h 56m 04s N d. 23h 03m 56s 1399: You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay entrance begins at 1800 EST (ZD +5), at what time would you depart from the Chesapeake Bay entrance to have the most favorable current?
N a. 1700 hours N b. 1800 hours N c. 1900 hours Y d. 2030 hours 1415: Planetary aberration is due, in part, to __________.
N a. refraction of light as it enters the Earth's atmosphere N b. rotation of the Earth on it's axis Y c. the body's orbital motion during the time required for its light to reach Earth N d. a false horizon 1493: You are running parallel to the coast and estimate that the current is against you. In plotting a running fix using bearings from the same object on the coast, the greatest safety margin from inshore dangers will result if what speed is used to determine the fix?
Y a. Minimum speed estimate N b. Maximum speed estimate N c. Average speed estimate N d. A running fix should not be used under these conditions. 1503: A radar range to a small, charted object such as a light will provide a line of position in which form?
N a. Straight line Y b. Arc N c. Parabola N d. Hyperbola 1536: What will NOT induce errors into a Doppler sonar log?
Y a. Increased draft N b. Pitch N c. Roll N d. Change in trim 1552: Which sextant in illustration D043NG reads 30°42.5'? (D043NG )
N a. A Y b. B N c. C N d. D 1569: Three or four feet of the total height of a storm surge in a hurricane can be attributed to __________.
N a. an increase in temperature N b. an increase in the wave period N c. the wind velocity Y d. the decrease in atmospheric pressure 1620: You are at anchor in the anchorage at the entrance to Delaware Bay. If you weigh anchor at 1445 DST (ZD +4) on 24 July 1983 and proceed northbound enroute to Philadelphia at a speed of 10 knots, you will have __________.
N a. a flood current the entire trip N b. a flood current from Ship John Shoal Lt. to Philadelphia N c. an ebb current north of New Castle, DE Y d. a weak flood between Reedy Island and Edgemoor 1628: As the temperature of the air reaches the dew point, __________.
N a. rain must develop Y b. fog may form N c. it begins to snow N d. water freezes 1674: The letter D in illustration D006NG represents the __________.
N a. visible horizon Y b. geometrical horizon N c. celestial horizon N d. geoidal horizon 1698: When a high pressure system is centered north of your vessel in the Northern Hemisphere __________.
N a. you should experience hot, moist, clear weather Y b. the wind direction is generally easterly N c. the winds should be from the southwest at your location N d. the winds should be brisk 1741: The left half of the storm is called the navigable semicircle because __________.
N a. the wind speed is decreased by the storm's forward motion N b. the wind tends to blow vessels away from the storms track Y c. Both A and B N d. Neither A nor B 1826: 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 D in the illustration? (D036NG )
N a. One red light Y b. Two green lights N c. Three green lights N d. No light 1932: The zenith is the point on the celestial sphere that is __________.
N a. 90° away from the poles Y b. directly over the observer N c. on the eastern horizon N d. over Greenwich 1969: The precession of the equinoxes of the Earth is __________.
N a. the gradual increase in the period of rotation caused by the effects of the Moon N b. the irregularity of the Earth's orbit caused by influences of the Sun and Moon N c. caused by the elliptical shape of the Earth's orbit Y d. similar to a top spinning with its axis tilted 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 2406: The dividing meridian between zone descriptions +4 and +5 is __________.
Y a. 67°30'W N b. 90°00'W N c. 67°30'E N d. 75°00'E 2414: You must construct a Mercator plotting sheet on a piece of paper measuring 20" by 28". The area includes latitude 38°S to 43°S and longitude 178°E to 175°W. Allow a one-half inch neat line on all sides. What is the maximum distance between each degree of longitude that will permit the area of the plotting sheet to be drawn within the stated limitations?
N a. 2.6 inches Y b. 2.9 inches N c. 3.2 inches N d. 3.5 inches 2456: An orange and white buoy marking an area where operating restrictions are in effect will be marked with which symbol?
N a. Open-faced diamond N b. Diamond with a cross Y c. Circle N d. Rectangle 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 2529: A bridge over a navigable waterway is being repaired. There is a traveler platform under the bridge's deck that significantly reduces the vertical clearance. If required by the CG district commander, how will this be indicated at night?
N a. Illumination by flood lights Y b. A quick flashing red light at each lower corner N c. A strobe light visible both up and downstream N d. Fixed amber lights under the extreme outer edges of the traveler 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 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 2714: A current moving across a lock entrance toward the river or toward the dam is called a(n) __________.
N a. cutoff Y b. outdraft N c. lockwash N d. springpool 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 2977: Which symbol represents a 2-fathom curve?
N a. -- -- -- N b. .. ____ .. ____ .. ____ N c. ____ . ____ . ____ . Y d. .. .. .. .. .. 3004: While navigating in fog off a coastline of steep cliffs, you hear the echo of the ship's fog horn 4 seconds after the signal was sounded. What is the distance to the shore?
N a. 209 yards N b. 363 yards N c. 480 yards Y d. 730 yards 3040: Which instrument is used to predict the approach of a low pressure system?
N a. Anemometer N b. Fathometer Y c. Barometer N d. Thermometer 3067: Which of the following are data layer categories to be displayed on ECDIS?
N a. ECDIS warnings and messages N b. Hydrographic Office data N c. Notice to Mariners information Y d. All of the above 3087: With respect to failure warnings and status indications, GPS receivers should provide, at a minimum, __________.
Y a. a warning of loss of position N b. a cross-track error alarm N c. an indication of a change in satellite configuration N d. an alarm if engine speed is suddenly reduced 3094: ECDIS must have the capability to preserve the record of the track for the previous __________.
Y a. 12 hours N b. 24 hours N c. 48 hours N d. 72 hours