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.
145: The standard time meridian for zone description -1 is __________.
N a. 0° N b. 7 1/2°W N c. 7 1/2°E Y d. 15°E 159: The apparent wind can be zero when the true wind is from __________.
N a. ahead and equal to the ship's speed Y b. astern and equal to the ship's speed N c. ahead and equal to twice the ship's speed N d. astern and equal to twice the ship's speed 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 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. 218: Lines of position may be __________.
N a. hyperbolas N b. straight lines N c. arcs Y d. All of the above 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 391: When outbound from a U.S. port, a buoy displaying a flashing red light indicates __________.
N a. a junction with the preferred channel to the left N b. a sharp turn in the channel to the right Y c. the port side of the channel N d. a wreck to be left on the vessel's starboard side 468: Which of the symbols shown represents a cold front? (D018NG )
N a. A Y b. B N c. C N d. D 479: You are enroute to assist vessel A. Vessel A is underway at 5 knots on course 063°T, and bears 136°T at 78 miles from you. What is the course to steer at 13 knots to intercept vessel A?
Y a. 114° N b. 158° N c. 295° N d. 340° 517: On 5 March 1983, at 0630 EST (ZD +5), what will be the predicted height of tide at Ocracoke, Ocracoke Inlet, NC?
Y a. 0.1 foot N b. 1.2 feet N c. 1.9 feet N d. 2.3 feet 547: On 2 November 1983, at 1630 EST (ZD +5), what will be the predicted height of tide at Fulton, FL?
Y a. 2.8 feet (0.8 meters) N b. 3.4 feet (1.0 meters) N c. 4.2 feet (1.3 meters) N d. 5.6 feet (1.7 meters) 572: You wish to measure the distance on a Mercator chart between a point in latitude 43°30'N and a point in latitude 40°30'N. To measure 30 miles at a time, you should set the points of the dividers at __________.
N a. 41°30' and 42°00' Y b. 41°45' and 42°15' N c. 42°00' and 42°30' N d. 42°15' and 42°45' 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 597: You will be loading in Boston Harbor to a maximum draft of 32'06". The charted depth of an obstruction in the channel near Boston Light is 30 feet and you wish to have 3 feet of keel clearance. The steaming time from the pier to the obstruction is 01h 05m. What is the latest time (ZD +4) you can sail on 17 May 1983 and meet these requirements?
N a. 1610 Y b. 1728 N c. 1821 N d. 2350 761: Under the IALA Buoyage Systems, a safe water mark may NOT __________.
N a. be spherical N b. display a white light N c. be lettered Y d. show a quick flashing 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 784: Variation is the angular measurement between __________.
N a. compass north and magnetic north N b. compass north and true north Y c. magnetic meridian and the geographic meridian N d. your vessel's heading and the magnetic meridian 883: When changing from a compass course to a true course you should apply __________.
N a. variation N b. deviation Y c. variation and deviation N d. a correction for the direction of current set 938: If within 500 yards (460m) of a Northern Right Whale you are lawfully obligated to __________.
N a. turn away from the whale and leave at full speed Y b. turn away from the whale and leave at slow speed N c. slow to bare steerageway until the whale swims away N d. stop the vessel and sound repeated blasts on the ship's whistle to scare the whale away 1011: You are underway in the North Sea on course 127°T. You sight a buoy with the topmarks shown bearing two points on the starboard bow. Which action must be taken? (D025NG )
N a. Alter course to starboard until the buoy is at least two points on the port bow, then hold course. N b. Alter course to port until the buoy is broad on the starboard quarter, then hold course. N c. Change course to have the buoy close aboard either side. Y d. Ensure the bearings change to the right. 1069: What do the numbers on isobars indicate?
Y a. barometric pressure N b. temperature N c. rain in inches N d. wind speed 1102: What is the approximate geographic range of Race Rock Light, NY, if your height of eye is 27 feet (8.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 9.9 nm N b. 14.3 nm Y c. 15.7 nm N d. 17.4 nm 1111: Black double-cone topmarks are the most important feature, by day, of cardinal marks. Which of the four topmarks shown indicates the best navigable water lies to the west of the buoy? (D030NG )
N a. A N b. B Y c. C N d. D 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 1144: Freezing salt water spray should be anticipated when the air temperature drops below what temperature?
N a. 32°F (0.0°C) Y b. 28°F (-2.2°C) N c. 0°F (-17.8°C) N d. -40°F (-28.9°C) 1288: 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 2310 EST (ZD +5)?
N a. 19.2 feet (5.9 meters) N b. 20.8 feet (6.3 meters) Y c. 24.7 feet (7.5 meters) N d. 25.8 feet (7.9 meters). 1338: Which type of cloud is indicated by the number 6? (D039NG )
N a. Altocumulus Y b. Stratocumulus N c. Altostratus N d. Cirrus 1342: An occluded front on a weather map is colored __________.
N a. blue line Y b. purple line N c. dashed blue line N d. alternate red and blue line 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 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 1394: A great circle crosses the equator at 17°W. It will also cross the equator at what other longitude?
N a. 173°W N b. 117°W Y c. 163°E N d. 17°E 1474: You are on course 061°T. To check the longitude of your vessel you should observe a celestial body on which bearing?
Y a. 090° N b. 180° N c. 241° N d. 061° 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 1494: Cirrocumulus clouds are indicated by which number? (D039NG )
N a. 7 N b. 5 Y c. 3 N d. 1 1534: You are preparing a weather report form, WS Form B-80. Your position is LAT 22°31'S, LONG 138°19'W. How would this be encoded? (D041NG )
N a. LAT 22.5°S, LONG 138.3°W Y b. 99225, 51383 N c. L2231, 53819 N d. 2231S, 5383W 1676: Lighted information markers show __________.
N a. green lights Y b. white lights N c. yellow lights N d. red lights 1708: What generally occurs when the land is cooler than the nearby water?
Y a. A land breeze N b. A sea breeze N c. A norther N d. A prevailing westerly 1840: A vessel heading NW is on a course of __________.
N a. 274.5° N b. 292.5° Y c. 315.0° N d. 337.5° 1946: When making landfall at night, you can determine if a light is a major light or an offshore buoy by __________.
N a. the intensity of the light Y b. checking the period and characteristics against the Light List N c. the color, because the buoy will have only a red or a green light N d. Any of the above can be used to identify the light. 1958: The spinning of a celestial body about its axis is known as __________.
Y a. rotation N b. revolution N c. space motion N d. nutation 1987: An instrument useful in predicting fog is the __________.
Y a. sling psychrometer N b. microbarograph N c. anemometer N d. aneroid barometer 2019: At evening stars, the last stars that should be observed are those with an azimuth in what quadrant?
N a. Southern Y b. Western N c. Northern N d. Eastern 2087: The Light List indicates that a light has a nominal range of 20 miles and is 52 feet (16 meters) high. If the visibility is 20 miles and your height of eye is 20 feet (6 meters), at what approximate distance will you sight the light?
N a. 33.0 nm N b. 20.0 nm Y c. 13.5 nm N d. 8.5 nm 2127: 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?
N a. No lights N b. One red light N c. Two red lights Y d. Three red lights 2129: 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?
N a. No lights Y b. Three red lights N c. Two red lights N d. One red light 2147: What lights would you see on the Illinois waterway when any wickets of the dam or bear traps are open, or partially open, which may cause a set in the current conditions in the upper lock approach?
N a. Green over blue Y b. Red over amber (yellow) N c. Red over green N d. None of the above 2269: One of the factors which affects the circulation of ocean currents is __________.
N a. humidity Y b. varying densities of water N c. vessel traffic N d. the jet stream 2400: You are in a channel in U.S. waters near an industrial plant with a load/discharge facility for barges. You see an emergency rotating flashing light on the facility light up. What does this indicate?
N a. A barge at the facility has commenced transferring a hazardous cargo. N b. A barge carrying a hazardous cargo is mooring or unmooring at the facility. N c. The facility is warning a barge to shut down transfer operations due to weather conditions (electrical storm, tornado, hurricane, etc.). Y d. There is danger at the facility due to a fire or cargo release. 2500: When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.
Y a. for inaccuracies in the reference level N b. the equivalent reading at the center of the body N c. the equivalent reading from the center of the Earth N d. the bending of the rays of light from the body 2627: Stormy weather is usually associated with regions of __________.
N a. high barometric pressure Y b. low barometric pressure N c. steady barometric pressure N d. changing barometric pressure 2666: The following boats are approaching a lock. Which has priority for locking?
N a. An 85-foot yacht Y b. Corps of Engineer towboat running empty-headed N c. "Delta Queen" (passenger vessel) N d. An integrated chemical tow 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 2722: The paths of intended travel between three or more points is the __________.
N a. course Y b. track N c. bearing N d. course over the ground 2750: When pushing a tow and approaching barges tied off to the shore, you should __________.
N a. increase speed so you will pass faster Y b. decrease speed while passing so you won't create a suction N c. do nothing different as the barges should be tied off properly N d. move to the opposite side of the channel from the barges and increase speed 2862: When slanted letters are used to spell the name of a charted object you know the __________.
N a. object is only a hazard to vessels drawing in excess of 20 feet N b. position is approximate or doubtful N c. object is always visible Y d. object may cover and uncover with the tide 2886: On mid-ocean waters, the height of a wind-generated wave is not affected by the __________.
Y a. water depth exceeding 100 feet N b. fetch N c. wind's velocity N d. duration of the wind 2944: The height of a wave is the vertical distance __________.
N a. from the still water plane to the crest N b. from the still water plane to the trough Y c. from crest to trough N d. between water levels at one-quarter of the wave's length 3017: A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles, in a locale off the East coast of the US, is approximately __________.
N a. 3 hours N b. 6 1/4 hours Y c. 12 1/2 hours N d. 18 3/4 hours 3065: Raster-scan chart data is __________.
N a. the only format recognized by IMO/IHO N b. organized into many separate files N c. composed of files that are smaller than vector files Y d. a digitized "picture" of a chart in one format and one layer 3086: Which data must ECDIS be able to record at one-minute intervals?
Y a. Course made good history N b. Estimated time of arrival N c. Speed through the water N d. Shaft RPM