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 43: A buoy with a composite group-flashing light indicates a(n) __________.
N a. anchorage area N b. fish net area Y c. bifurcation N d. dredging area 106: A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a __________.
N a. foehn N b. chinook N c. land breeze Y d. sea breeze 149: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 100°T, 120 miles from your position. The hurricane is moving towards 275°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
N a. 339° Y b. 333° N c. 326° N d. 320° 180: What is a lighted safe water mark fitted with to aid in its identification?
Y a. A spherical topmark N b. Red and white retroreflective material N c. A sequential number N d. A red and white octagon 215: The equation of time is 12m 00s and the mean Sun is ahead of the apparent Sun. If you are on the central meridian of your time zone, at what zone time will the apparent Sun cross the meridian?
N a. 1148 N b. 1200 Y c. 1212 N d. It cannot be determined from the information given. 236: The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the __________.
N a. doldrums N b. horse latitudes Y c. trade winds N d. prevailing westerlies 399: Where will you find information about the duration of slack water?
N a. American Practical Navigator N b. Sailing Directions N c. Tide Tables Y d. Tidal Current Tables 488: A great circle crosses the equator at 93°W. It will also cross the equator at what other longitude?
N a. 13°E Y b. 87°E N c. 177°E N d. 177°W 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 602: Between the equator and the 46th parallel of latitude, there are 3099 meridional parts. How many degrees of equatorial longitude does 3099 meridional parts represent?
N a. 35°52'45" Y b. 51°39'00" N c. 74°21'11" N d. 82°36'12" 656: In the Northern Hemisphere you are caught in the dangerous semicircle with plenty of sea room available. The best course of action is to bring the wind on the __________.
Y a. starboard bow and make as much headway as possible N b. starboard quarter, and make as much headway as possible N c. port quarter, and make as much headway as possible N d. port bow, and make as much headway as possible 661: Under the IALA Buoyage Systems, safe water marks may show a __________.
N a. composite group-flashing, Fl(2 + 1), red light N b. composite group-flashing, Fl(2 + 1), green light N c. quick-flashing, Q(9)15s, white light Y d. white Morse (A) light 775: A sidereal day is shorter than a solar day. This difference is due to __________.
N a. irregularities in the daily rotational rate of the Sun N b. the space motion of the solar system N c. the precession of the equinoxes Y d. the use of different reference points 933: How many degrees are there on a compass card?
Y a. 360° N b. 380° N c. 390° N d. 420° 952: What is TRUE concerning new editions of Light Lists?
N a. Supplements to new editions are issued monthly by the U.S. Coast Guard. N b. New editions are published by the National Ocean Service. Y c. New editions are corrected through the date shown on the title page. N d. None of the above 987: Which current is responsible for the movement of icebergs into the North Atlantic shipping lanes?
N a. Iceland Current N b. Baltic Current Y c. Labrador Current N d. Baffin Current 1008: The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?
N a. 18.0 nm N b. 14.8 nm Y c. 11.7 nm N d. 6.0 nm 1067: The two most effective generating forces of surface ocean currents are __________.
N a. temperature and salinity differences in the water Y b. wind and density differences in the water N c. water depth and underwater topography N d. rotation of the Earth and continental interference 1109: You are on course 146°T. To check the speed of your vessel you should observe a celestial body on which bearing?
N a. 000° N b. 056° N c. 090° Y d. 146° 1114: Mechanical lifting of air by the upslope slant of the terrain is called __________.
N a. vertical lifting N b. convective lifting N c. advective lifting Y d. topographic lifting 1166: A series of brief showers accompanied by strong, shifting winds may occur along or some distance ahead of a(n) __________.
N a. upper front aloft N b. cyclone N c. occluded front Y d. cold front 1227: What will be the direction and velocity of the tidal current at Provincetown Harbor, MA, at 1405 DST (ZD +4) on 5 May 1983?
N a. 0.0 knot at 135°T N b. 0.2 knot at 135°T Y c. 0.4 knot at 315°T N d. 0.6 knot at 315°T 1269: The Light List indicates that a light has a nominal range of 14 miles and is 42 feet (12.7 m) high. If the visibility is 16 miles and your height of eye is 20 feet (6.1 m), at which approximate distance will you sight the light?
N a. 20.1 miles N b. 16.0 miles Y c. 12.8 miles N d. 7.6 miles 1290: In addition to the National Weather Service, what agency provides plain-language radio weather advisories for the coastal waters of the United States?
N a. National Geospatial-Intelligence Agency N b. U.S. Hydrological Survey Y c. U.S. Coast Guard N d. American Meteorological Service 1299: What will be the time (ZD +5) of the second high tide at Weymouth Fore River Bridge, MA, on 12 November 1983?
N a. 1639 N b. 1643 N c. 1647 Y d. 1650 1329: Yesterday your chronometer read 03h 01m 56s at the 1500 GMT time tick. Today your chronometer read 03h 01m 54s at the 1500 GMT time tick. What is the chronometer rate?
N a. 1m 54s fast N b. 2s fast Y c. -2s N d. +2s 1344: Which of the buoy symbols shown indicates a safe water mark? (D032NG )
Y a. D N b. C N c. B N d. A 1355: The parallax of the Moon is greatest when the Moon is __________.
N a. in the zenith at perigee N b. on the horizon at apogee N c. at its maximum altitude at apogee Y d. on the horizon at perigee 1426: Fog is most commonly associated with a(n) __________.
Y a. warm front at night N b. low pressure area N c. anticyclone N d. cold front in the spring 1480: 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 N c. The vertical distance from the surface of the water to the ocean floor Y d. The vertical distance from the tidal datum to the level of the water at any time 1537: Which sextant in illustration D043NG reads 29°47.5'? (D043NG )
N a. A N b. B Y c. C N d. D 1545: The change in the length of day becomes greater as latitude increases because of the __________.
N a. inclination of the diurnal circle to the equator N b. decreasing distance between the terrestrial meridians Y c. increased obliquity of the celestial sphere N d. changing distance between the earth and the sun 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 1635: An isotherm is __________.
N a. a line on a weather map connecting equal points of both temperature and pressure N b. an instrument that measures the climatological effects of temperature N c. a line connecting points of equal barometric pressure on a weather map Y d. a line connecting points of equal temperature on a weather map 1691: Which of the following is associated with consistently high barometric pressure?
Y a. The horse latitudes N b. The doldrums N c. The prevailing westerlies N d. The trade winds 1739: Which condition indicates that you are in a hurricane's dangerous semicircle in the Northern hemisphere?
N a. A backing wind Y b. A veering wind N c. A norther N d. A strong, gusty wind 1758: The climate of the eastern Gulf coast __________.
N a. is humid and subtropical throughout the year N b. has an east coast marine type of climate N c. has a Mediterranean type of climate Y d. varies from warm to subtropical 1763: Weather patterns in the Gulf Coast area of the United States are __________.
Y a. those of a transition zone between tropical and a temperate area N b. those of a tropical region N c. extremely hot in summer N d. tropical over Florida and subtropical over the rest of the Gulf Coast area 1770: A Doppler speed log indicates speed over ground __________.
N a. at all times Y b. in the bottom return mode N c. in the volume reverberation mode N d. only when there is no current 1790: A Doppler speed log indicates speed through the water __________.
N a. at all times N b. in the bottom return mode Y c. in the volume reverberation mode N d. only when there is no current 1816: A white buoy with an orange circle marked on it indicates __________.
N a. danger N b. vessels are excluded from the area N c. a mooring buoy Y d. operating restrictions are in effect 1824: 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 C in the illustration? (DO36NG )
N a. One red light N b. Two green lights Y c. Three green lights N d. No light 1907: Information about direction and velocity of rotary tidal currents is found in the __________.
N a. Tide Tables N b. Nautical Almanac Y c. Tidal Current Tables N d. Mariner's Guide 2068: The illustration 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 D if the lock walls and piers are not awash? (D037NG )
Y a. One red light N b. Two red lights N c. Three red lights N d. One amber light 2177: This diagram 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 D if the lock walls and piers are not awash? (D037NG )
N a. One amber light N b. Three red lights N c. Two red lights Y d. One red light 2207: Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?
N a. Nil N b. 12h Y c. +2s N d. -2s 2209: You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 266°. You should now adjust the compass until it reads __________.
Y a. 268° N b. 270° N c. 274° N d. Do not adjust the compass, just record the error. 2430: You are on course 222°T and take a relative bearing of a lighthouse of 025°. What is the true bearing to the lighthouse?
N a. 197° Y b. 247° N c. 315° N d. 335° 2480: You are on course 277°T and take a relative bearing of a lighthouse of 045°. What is the true bearing to the lighthouse?
N a. 038° N b. 232° N c. 315° Y d. 322° 2508: Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from __________.
N a. low steel on the Huey P. Long Bridge Y b. mean sea level N c. the local water table N d. the minimum dam control level 2651: Low pressure disturbances which travel along the intertropical convergence zone are called __________.
Y a. tropical waves N b. tropical disturbances N c. permanent waves N d. tidal waves 2678: A vessel crossing a river on the Western Rivers, must keep out of the way of a power-driven vessel __________.
N a. descending the river with a tow N b. ascending the river with a tow N c. ascending the river without a tow Y d. All of the above 2849: You take a bearing of 086° of a lighthouse. What bearing of another object would give the best fix?
Y a. 000° N b. 066° N c. 112° N d. 271° 2899: You take a bearing of 043° and 169° of two objects. What bearing of a third object will give the best fix?
N a. 356° N b. 073° N c. 192° Y d. 309° 2950: On an Army Corps of Engineers navigation map, each mile A.H.P. on the Lower Mississippi River is marked by a __________.
N a. dashed red line N b. number showing mileage N c. navigation light Y d. red circle 3078: Which data must ECDIS be able to record at one-minute intervals?
N a. Position N b. Electronic navigational chart source N c. Course made good history Y d. All of the above 3093: ECDIS must have the capability to preserve the record of the track for the previous __________.
N a. 4 hours N b. 6 hours Y c. 12 hours N d. 24 hours 3125: Which of the following statements is TRUE regarding automatic identification systems (AIS)?
N a. AIS is designed to replace ARPA, maneuvering boards, and visual bearings as a means to ascertain the risk of collision. Y b. AIS provides near real-time information regarding another vessel's speed over ground and heading regardless of visibility. N c. AIS will not provide information on another vessel if that vessel is indistinguishable in radar sea clutter. N d. AIS can be relied upon as the sole means to determine course changes due to other AIS equipped traffic.