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.
14: You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded?
Y a. Test the electrical gain to the thermograph pens N b. Set the zone pen on the correct quadrant N c. Line the course pen up on the exact heading of the ship N d. Adjust the chart paper to indicate the correct time 55: Your longitude is 179°59'W. The LMT at this longitude is 23h 56m on the 4th day of the month. Six minutes later, your position is 179°59'E longitude. Your LMT and date are __________.
N a. 00h 02m on the 4th N b. 00h 02m on the 5th N c. 23h 50m on the 5th Y d. 00h 02m on the 6th 94: When using a recording depth finder in the open ocean, what phenomena is most likely to produce a continuous trace that may not be from the actual ocean bottom?
Y a. Echoes from a deep scattering layer N b. Echoes from schools of fish N c. Multiple returns reflected from the bottom to the surface and to the bottom again N d. Poor placement of the transducer on the hull 222: Which statement concerning the illustration is correct? (Soundings and heights are in meters) (D010NG )
N a. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. N b. The position of the lightship is indicated by the center of the star on the symbol's mast. N c. There is a 12 meter deep hole inside the 5-meter curve just west of Beito Island. Y d. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. 231: You are outbound in a buoyed channel on course 015°T. You sight a white light showing a Morse (A) characteristic bearing 359° relative. For safety, you should __________.
N a. change course to 359°T to pass near to the buoy Y b. stay in the channel and leave the buoy to port N c. alter course to 000°T and leave the buoy well clear to starboard N d. check the chart to see where the marked danger lies in relation to the buoy 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 421: Daylight savings time is a form of zone time that adopts the time __________.
N a. one zone to the west Y b. one zone to the east N c. two zones to the west N d. two zones to the east 447: On 27 April 1983, at 1105 DST (ZD +4), what will be the predicted height of tide at Falkner Island, CT?
Y a. 5.3 feet (1.6 m) N b. 5.6 feet (1.7 m) N c. 6.2 feet (1.9 m) N d. 6.8 feet (2.7 m) 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 496: Severe tropical cyclones (hurricanes, typhoons) occur in all warm-water oceans except the __________.
N a. Indian Ocean N b. North Pacific Ocean N c. South Pacific Ocean Y d. South Atlantic Ocean 508: Which statement about the chartlet is TRUE? (Soundings and heights are in meters) (D010NG )
Y a. There is a dangerous eddy southeast of Beito Island. N b. Maury lightship is visible for 17 miles. N c. The bottom to the south-southeast of the lightship is soft coral. N d. There is a 12-meter deep west of Beito Island and inside the 5-meter line. 585: What great circle is always needed to form the astronomical triangle?
N a. Celestial Equator N b. Prime Meridian Y c. Celestial Meridian N d. Prime Vertical Circle 636: Tropical cyclones are classified by form and intensity. Which system does not have closed isobars?
N a. Hurricane Y b. Tropical disturbance N c. Tropical depression N d. Cyclone 639: In the Northern Hemisphere, what type of cloud formations would you expect to see to the west of an approaching tropical wave?
Y a. Cumulus clouds lined up in rows extending in a northeast to southwest direction N b. High altostratus clouds in the morning hours N c. Cirrostratus clouds lined up in rows extending in a northeast to southwest direction N d. Cirrostratus clouds lined up in rows extending in a north to south direction 645: The arc of an hour circle between the celestial equator and a point on the celestial sphere, measured northward or southward through 90°, is the __________.
N a. altitude Y b. declination N c. latitude N d. azimuth angle 673: You are underway at 5 knots and see on your radar a contact 10 miles directly astern of you. 12 minutes later, the contact is 8 miles directly astern of you. What is the estimated speed of the contact?
N a. Dead in the water N b. 1 knot N c. 10 knots Y d. 15 knots 739: The upper vertex of a great circle track is in LONG 156°00'E. Sailing eastward, the great circle track will cross the equator in LONG __________.
Y a. 114°00'W N b. 110°00'W N c. 66°00'W N d. 66°00'E 742: You are preparing to take a tow from San Diego to Portland, OR. Good seamanship would require that you have on board, available for reference and use, all of the following EXCEPT the __________.
N a. Coast Pilot N b. harbor and coastal charts for ports of refuge enroute Y c. Sailing Directions (Enroute) N d. Light List 868: Your ship received a HYDROLANT advising of a special warning to mariners from the Department of State for ships in the Persian Gulf. You are 400 miles south of, and bound for, the Persian Gulf. What action should you take?
N a. Continue on course as the warning is advisory in nature only. Y b. Send an AMVER report and acknowledge receipt of the warning. N c. Remain a minimum of 500 miles outside the Persian Gulf and maintain radio silence. N d. Send a MERWARN message advising your position, course, speed and intentions. 890: If several navigational lights are visible at the same time, each one may be positively identified by checking all of the following EXCEPT what against the Light List?
N a. Rhythm N b. Period Y c. Intensity N d. Color 897: What current flows southward along the west coast of the United States and causes extensive fog in that area?
N a. Davidson Current N b. North Pacific Current N c. Alaska Current Y d. California Current 907: In which month will the equatorial counter current be strongest?
N a. January N b. April Y c. August N d. October 961: In which country would you expect the channels to be marked with the IALA-B Buoyage System?
Y a. Brazil N b. Tanzania N c. New Zealand N d. Norway 1006: An air mass is termed "warm" if __________.
N a. it is above 70°F Y b. the ground over which it moves is cooler than the air N c. it originated in a high pressure area N d. it originated in a low pressure area 1024: The dew point is reached when the __________.
N a. temperature of the air equals the temperature of the seawater N b. atmospheric pressure is 14.7 lbs. per square inch N c. relative humidity reaches 50% Y d. air becomes saturated with water vapor 1062: What is the approximate geographic range of Horton Point Light, NY, if your height of eye is 40 feet (12.2 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS" .
N a. 18.8 nm Y b. 19.3 nm N c. 20.3 nm N d. 24.8 nm 1064: The dew point temperature is __________.
N a. always higher than the air temperature N b. always lower than the air temperature N c. equal to the difference between the wet and dry bulb temperatures Y d. the temperature at which the air is saturated with water vapor 1126: When a warm air mass is adjacent to a cold air mass, the separation line between the two is called a(n) __________.
Y a. front N b. isobar N c. isotherm N d. equipotential line 1132: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon Y b. 5-fathom curve N c. prohibited area N d. lighted buoy 1216: In the Northern Hemisphere, winds veering sharply to the west or northwest with increasing speed are indications that a __________.
Y a. cold front has passed N b. low pressure center is approaching N c. stationary front exists N d. high pressure center has passed 1223: The difference between magnetic heading and compass heading is called __________.
N a. variation Y b. deviation N c. compass error N d. drift 1237: What will be the velocity of the tidal current at Port Royal, VA, at 1505 DST (ZD +4) on 4 June 1983?
N a. 0.0 knot N b. 0.1 knot Y c. 0.4 knot N d. 0.7 knot 1257: What will be the velocity of the tidal current 1.0 mile southwest of Lewis Pt., RI, at 1501 EST (ZD +5) on 4 April 1983?
Y a. 0.7 knot N b. 1.4 knots N c. 1.6 knots N d. 1.9 knots 1275: How is variation indicated on a small-scale nautical chart?
N a. Magnetic compass table N b. Magnetic meridians Y c. Isogonic lines N d. Variation is not indicated on small-scale nautical charts. 1339: You are on course 303°T. To check the speed of your vessel you should observe a celestial body on which bearing?
N a. 000° N b. 090° Y c. 123° N d. 213° 1360: Which type of cloud is composed entirely of ice crystals and is found at very high altitudes?
N a. Cumulus Y b. Cirrus N c. Stratus N d. Nimbostratus 1381: Geographic range is the maximum distance at which a light may be seen under __________.
N a. existing visibility conditions, limited only by the curvature of the Earth Y b. perfect visibility conditions, limited only by the curvature of the Earth N c. existing visibility conditions, limited only by the intensity of the light N d. perfect visibility conditions, limited only by interference from background lighting 1391: When a light is first seen on the horizon it will disappear again if the height of eye is immediately lowered several feet. When the eye is raised to its former height the light will again be visible. This process is called __________.
N a. checking a light N b. raising a light N c. obscuring a light Y d. bobbing a light 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 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 1602: Most modern Loran-C receivers automatically detect secondary station blink which __________.
N a. indicates the station is transmitting normally N b. automatically shuts down the receiver Y c. triggers alarm indicators to warn the operator N d. causes the receiver to shift automatically to another Loran chain 1603: A position that is obtained by using two or more intersecting lines of position, taken at nearly the same time, is a(n) __________.
N a. estimated position Y b. fix N c. running fix N d. dead-reckoning position 1629: Air temperature varies with __________.
N a. the altitude above sea level N b. the season of the year N c. the latitude or distance from the equator Y d. All of the above 1717: A tropical storm is a tropical cyclone that generates winds of __________.
N a. between 20 and 33 knots Y b. between 34 and 63 knots N c. over 63 knots N d. None of the above 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 1919: The nadir is the point on the celestial sphere that is __________.
N a. 90° away from the zenith N b. over Greenwich N c. on the western horizon Y d. directly below the observer 1970: The azimuth angle of a sun sight is always measured from the __________.
N a. Greenwich meridian N b. prime vertical circle Y c. principal vertical circle N d. first point of Aries 2120: If a chart indicates the depth of water to be 6 fathoms and your draft is 6.0 feet, what is the depth of the water under your keel? (Assume the actual depth and charted depth to be the same)
N a. 6.0 feet N b. 26.5 feet Y c. 30.0 feet N d. 56.5 feet 2240: If you observe a buoy off station you should __________.
N a. fill out and mail CG Form 2692 to the nearest Coast Guard office N b. appear in person at the nearest Coast Guard office N c. notify Coast Guard Headquarters in Washington, DC Y d. immediately contact the nearest Coast Guard office by radiotelephone 2397: The letter D in illustration D006NG represents the __________.
N a. sensible horizon N b. celestial horizon N c. visible horizon Y d. geometrical horizon 2468: Under the U.S. Aids to Navigation System on the Western Rivers, the buoys marking the starboard side of the channel when going upstream will be __________.
N a. black Y b. red N c. green N d. yellow 2690: Right ascension is primarily used by the navigator for __________.
N a. calculating amplitudes N b. calculating great circle sailings by the Ageton method N c. entering the Air Navigation Tables (Selected Stars) Pub 249 Y d. plotting on star finders 2711: Information about currents on the Pacific Coast of the U. S. are found in the __________.
Y a. Tidal Current Tables N b. Nautical Almanac N c. Tide Tables N d. Ocean Current Tables 2716: Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are __________.
N a. green squares N b. green diamonds N c. red diamonds Y d. red triangles 2869: A pillar buoy is indicated by which letter shown in the illustration? (D044NG )
N a. A N b. B Y c. C N d. D 2884: The pictures shown represent the geographic location of a vessel and the radar presentation at the same time. Which statement is TRUE? (D011NG )
Y a. Ship No. 1 does not appear as an individual target due to the effect of beam width. N b. Small island is not detected due to the multiple echo effect from the mountain. N c. A tangent bearing of the headland to the south-southeast is corrected by subtracting one-half of the beam width. N d. Ship No. 2 is not detected due to the side lobe effect of radar reflecting from the mountain. 2908: A daymark used to indicate the port side of the channel when approaching from seaward is indicated by what letter in illustration D045NG?
Y a. A N b. B N c. C N d. D 2959: Vessels required to have an Automatic Radar Plotting Aid must have a device to indicate the __________.
N a. time of the next navigational satellite N b. distance to the next port Y c. speed of the vessel over the ground or through the water N d. None of the above 3012: The draw span of a floating drawbridge may be marked with __________.
Y a. a yellow light showing Morse Code (B) N b. a yellow and white diamond N c. flashing blue lights N d. three red lights on each side of the draw 3108: Automatic identification systems (AIS) are expected to broadcast all of the following information EXCEPT __________.
N a. navigation status N b. ship's heading Y c. port of origin N d. time stamp