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.
37: What does the term "tide" refer to?
N a. Horizontal movement of the water Y b. Vertical movement of the water N c. Mixing tendency of the water N d. Salinity content of the water 146: What change in the wind direction could be expected at position "D" if the low were moving northeasterly? (D049NG )
Y a. Veering to the west N b. Backing to the north N c. Veering to the north N d. Backing to the east 188: Off Barnegat, NJ, with the wind coming out of the east, the wind-driven current will be flowing approximately __________.
N a. 286° Y b. 254° N c. 106° N d. 016° 201: What is a lighted safe water mark fitted with to aid in its identification?
N a. Red and white retroreflective material Y b. A spherical topmark N c. A sequential number N d. A red and white octagon 268: The illustration shows the symbols used on radio facsimile weather charts. The symbol indicated at letter "L" represents a __________. (D042NG )
N a. convergence line N b. maritime air mass N c. warm front Y d. convergence zone 278: You are underway on course 050°T and your maximum speed is 11 knots. The eye of a hurricane bears 070°T, 80 miles from your position. The hurricane is moving towards 270°T at 19 knots. If you maneuver at 11 knots to avoid the hurricane, what could be the maximum CPA?
N a. 84 miles N b. 79 miles N c. 74 miles Y d. 66 miles 334: The index error is determined by adjusting the __________.
N a. sextant frame N b. horizon glass N c. index mirror Y d. micrometer drum 341: Buoys which only mark the left or right side of the channel will never exhibit a light with which characteristic?
N a. Flashing N b. Quick flashing Y c. Composite group flashing N d. Equal interval (isophase) 377: Determine the height of the tide at 2045 EST (ZD +5) at Augusta, ME, on 8 March 1983.
N a. 1.4 feet (0.5 meter) Y b. 1.9 feet (0.6 meter) N c. 2.3 feet (0.7 meter) N d. 2.6 feet (0.8 meter) 408: A buoy bears 176°T at 3000 yards. What is the course to make good to leave the buoy 100 yards to port?
N a. 174°T N b. 176°T Y c. 178°T N d. 180°T 415: If the Sun's observed altitude is 54°30', what is the zenith distance?
Y a. 35°30' N b. 45°30' N c. 12°30' N d. 14°30' 448: Mean high water is the reference datum used to measure __________.
N a. soundings on the east coast of the United States N b. soundings in European waters Y c. heights of topographical features in the United States N d. both heights and soundings worldwide 457: Find the height of the tide at Port Wentworth, GA, on 5 October 1983, at 1840 DST (ZD +4).
N a. 3.0 feet N b. 3.5 feet N c. 4.0 feet Y d. 4.4 feet 468: Which of the symbols shown represents a cold front? (D018NG )
N a. A Y b. B N c. C N d. D 506: You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m. What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?
N a. 1454 N b. 1424 N c. 1405 Y d. 1342 518: With regard to GPS, a civilian receiver may be capable of achieving the same accuracy as a military receiver if __________.
Y a. selective availability is set to zero N b. the satellites are all below 15° in elevation N c. your vessel is equipped with a Doppler receiver N d. the horizontal dilution of precision is high 523: A radar display in which North is always at the top of the screen is a(n) __________.
N a. unstabilized display Y b. stabilized display N c. composition display N d. relative display 539: You are underway on course 050°T and your maximum speed is 13 knots. The eye of a hurricane bears 120°T, 100 miles from your position. The hurricane is moving towards 265°T at 25 knots. What course should you steer at 13 knots to have the maximum CPA?
Y a. 324°T N b. 306°T N c. 299°T N d. 276°T 562: You wish to measure the distance on a Mercator chart between a point in latitude 42°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 __________.
Y a. 41°15' and 41°45' N b. 41°45' and 42°15' N c. 42°15' and 42°45' N d. 42°00' and 42°30' 599: Magnetic compass deviation __________.
N a. varies depending upon the bearing used Y b. is the angular difference between magnetic north and compass north N c. is published on the compass rose on most nautical charts N d. is the angular difference between geographic and magnetic meridians 715: The length of the year with respect to the vernal equinox is the __________.
Y a. tropical year N b. sidereal year N c. anomalistic year N d. All of the above 754: Deviation in a compass is caused by the __________.
N a. vessel's geographic position N b. vessel's heading N c. earth's magnetic field Y d. influence of the magnetic materials of the vessel 827: The Benguela Current flows in a __________.
N a. SW'ly direction along the NW coast of Africa N b. S'ly direction off the East Coast of Australia Y c. NW'ly direction along the SW coast of Africa N d. SW'ly direction along the SE coast of Greenland 829: You are plotting a running fix in an area where there is a determinable current. How should this current be treated in determining the position?
N a. The drift should be added to the ship's speed. N b. The set should be applied to the second bearing. N c. The current should be ignored. Y d. The course and speed made good should be determined and used to advance the LOP. 913: How many points are there in a compass card?
N a. 4 N b. 8 N c. 24 Y d. 32 933: How many degrees are there on a compass card?
Y a. 360° N b. 380° N c. 390° N d. 420° 955: The line of position determined from a sight with an observed altitude (Ho) of 88°45.0' should be __________.
N a. reduced to the meridian and plotted as a latitude line N b. calculated as a longitude line N c. plotted by using an intercept from an assumed position Y d. plotted as an arc around the GP of the body 996: Warm air masses will generally have __________.
N a. turbulence within the mass Y b. stratiform clouds N c. heavy precipitation N d. good visibility 1017: Which statement(s) concerning the effect of Coriolis force on ocean currents is(are) correct?
N a. The deflection of the current is to the left in the Northern Hemisphere. N b. The Coriolis force is greater in the lower latitudes. Y c. The Coriolis force is more effective in deep water. N d. All of the above 1033: Deviation which is maximum on intercardinal compass headings may be removed by the __________.
N a. Flinders bar N b. transverse magnets N c. fore-and-aft magnets Y d. soft iron spheres on the sides of the compass 1056: The steepness of a cold front depends on __________.
N a. the direction of wind around the front Y b. its velocity N c. the temperature of the air behind the front N d. the precipitation generated by the front 1099: You are enroute to assist vessel A. Vessel A is underway at 6 knots on course 133°T, and bears 343°T at 92 miles from you. What is the course to steer at 9 knots to intercept vessel A?
N a. 356° Y b. 003° N c. 022° N d. 038° 1128: In 1981, when would Jupiter and Saturn be visible in temperate latitudes for both evening and morning stars?
N a. 10 January Y b. 27 March N c. 22 June N d. 8 October 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 1196: In the Northern Hemisphere, gusty winds shifting clockwise, a rapid drop in temperature, thunderstorms or rain squalls in summer (frequent rain/snow squalls in winter) then a rise in pressure followed by clearing skies, indicate the passage of a(n) __________.
N a. warm front N b. tropical cyclone N c. anticyclone Y d. cold front 1210: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T and have the range in sight as shown. The range continues to open. What action should you take? (D047NG )
N a. Alter course to the right to 309°T or more to bring the range in line. N b. Maintain course as it is normal for the range to open as you get close. Y c. Alter course to the left until the range closes, then steer to the left of 306°T. N d. Alter course to the left to close the range, then alter course to 309°T. 1267: What will be the velocity of the tidal current at Coxsackie, NY, at 0945 EST (ZD +5) on 11 March 1983?
N a. 0.3 knot Y b. 0.7 knot N c. 1.2 knots N d. 1.9 knots 1313: Variation in a compass is caused by __________.
N a. worn gears in the compass housing Y b. magnetism from the earth's magnetic field N c. magnetism within the vessel N d. lack of oil in the compass bearings 1464: A line of position derived from a loran reading is a section of a(n) __________.
N a. straight line N b. arc N c. parabola Y d. hyperbola 1502: You are running parallel to the coast and take a running fix using bearings of the same object. If you are making less speed than used for the running fix, in relation to the position indicated by the fix, you will be __________.
Y a. closer to the coast N b. farther from the coast N c. on the track line ahead of the fix N d. on the track line behind the fix 1521: To avoid error you should read the scale of an aneroid barometer with your eye placed __________.
N a. to the right of the pointer N b. to the left of the pointer Y c. directly in front of the pointer N d. slightly above the meniscus 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 1692: The force resulting from the earth's rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called __________.
N a. pressure gradient Y b. Coriolis effect N c. aurora borealis N d. ballistic deflection 1707: "Surface circulation" is another term for __________.
N a. cyclones N b. air in motion at all levels of the atmosphere Y c. wind in the lower troposphere N d. ocean currents 1842: What is the major problem with taking high altitude observations?
N a. Possible errors due to unusual refraction may exist. N b. The tables are not as accurate due to inherent errors in the spherical triangle at high altitudes. N c. Rapidly changing altitudes make it difficult to get an accurate altitude. Y d. It is difficult to establish the point where the sextant is vertical to the horizon. 1954: In the horizon system of coordinates what is equivalent to the poles on the Earth?
N a. Celestial poles Y b. Zenith, nadir N c. Ecliptic poles N d. Nodes 2066: 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. One red light N b. Two red lights Y c. Three red lights N d. No lights 2085: Information about major breakdowns, repairs, or other emergency operations with regard to weirs and (or) wicket dams, on the western rivers, may be obtained from the __________.
Y a. Broadcast Notice to Mariners N b. Light List Vol. V N c. U.S. Coast Pilot N d. Sailing Directions 2104: A white buoy marked with an orange rectangle indicates __________.
N a. mid-channel N b. a fish net area Y c. general information N d. an anchorage 2251: Which statement concerning the chartlet shown is TRUE? (Soundings and heights are in meters) (D010NG )
N a. Maury lightship is visible for 17 miles. N b. The bottom to the south-southeast of the lightship is soft coral. Y c. There is a dangerous eddy southeast of Beito Island. N d. There is a 12-meter deep west of Beito Island and inside the 5-meter line. 2429: The lock chamber is 600 feet X 110 feet. Your towboat is 150 feet X 35 feet. Which of these tows will require a double lockage?
N a. A set-over single N b. 4 standard barges abreast next to your boat's head and 3 jumbo abreast in the lead N c. 6 jumbo (3 abreast and 2 long) with a standard on each side of your boat Y d. 9 jumbo barges 2616: What is the equivalent of 4 min. 04 sec. in arc units?
N a. 60°16' N b. 8°08' N c. 2°08' Y d. 1°01' 2658: You must draw a plotting sheet covering latitudes 45°N to 49°N and longitudes 179°E to 178°W. If the distance between each degree of longitude is 5 3/4 inches, what is the distance between latitude 45°N and latitude 49°N?
N a. 33.1 inches N b. 33.3 inches Y c. 33.6 inches N d. 33.9 inches 2662: You must construct a Mercator plotting sheet on a piece of paper measuring 24" by 28". The area includes latitude 37°S to 42°S and longitude 175°E to 179°W. Allow a one 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. 3.33 inches N b. 3.41 inches Y c. 3.67 inches N d. 3.82 inches 2760: You are pushing a tow ahead, at high speed, near the right hand bank of a canal. The forces affecting your towboat and tow will tend to __________.
N a. push both the head of the tow and the stern of the towboat away from the right hand bank Y b. push the head of the tow away from, and pull the stern of the towboat into, the right hand bank N c. pull both the head of the tow and the stern of the towboat into the right hand bank N d. pull the head of the tow into, and push the stern of the towboat away from, the right hand bank 2774: Your radar is set on a true motion display. Which of the following will NOT appear to move across the PPI scope?
Y a. Echoes from a buoy N b. Own ship's marker N c. Echo from a ship on the same course at the same speed N d. Echo from a ship on a reciprocal course at the same speed 2878: Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required to know the actual time of meridian transit in order to take an accurate observation at LAN?
N a. C 356°T, Sp 5 knots N b. C 099°T, Sp 17 knots Y c. C 192°T, Sp 23 knots N d. C 278°T, Sp 6 knots 2916: You take a bearing of 191° and 313° to two objects. Which bearing of a third object will give the best fix?
N a. 022° N b. 131° N c. 211° Y d. 249° 2979: You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?
N a. 013° Y b. 082° N c. 176° N d. 201° 3029: On 13 November 1981 you observe a back sight of the upper limb of the Moon. The sextant altitude (hs) is 110°31.2'. The height of eye is 46 feet and the index error is 2.0' on the arc. The horizontal parallax is 61.3'. What is the observed altitude (Ho)?
N a. 70°11.8' Y b. 69°41.8' N c. 69°25.6' N d. 69°18.4'