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.
75: The zone time of LAN is 1152. Your longitude is 73°15'E. What time would you use to enter the Nautical Almanac to determine the declination of the Sun at LAN?
Y a. 0659 N b. 0652 N c. 1859 N d. 1852 89: The GHA of the first point of Aries is 315° and the GHA of a planet is 150°. What is the right ascension of the planet?
N a. 7 hours Y b. 11 hours N c. 19 hours N d. 23 hours 147: Which statement is TRUE concerning equatorial tides?
N a. They occur when the Sun is at minimum declination north or south. N b. They occur when the Moon is at maximum declination north or south. Y c. The difference in height between consecutive high or low tides is at a minimum. N d. They are used as the basis for the vulgar establishment of the port. 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 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. 228: The Illustration shows the symbols used on radio facsimile weather charts. Which of these symbols indicates a convergence line? (D042NG )
N a. L N b. F N c. M Y d. Q 275: Which statement concerning illustration is correct? (Soundings and heights are in meters) (D010NG )
Y a. The sunken wreck southwest of Beito Island shows the hull or superstructure above the sounding datum. N b. There is a 12-meter deep hole inside the 5-meter curve just west of Beito Island. N c. The position of the lightship is indicated by the center of the star on the symbol's mast. N d. Maury Lightship swings about her anchor on a circle with a 21-meter diameter. 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 288: When using a radar in a unstabilized mode, fixes are determined most easily from __________.
N a. center bearings N b. tangent bearings Y c. ranges N d. objects that are close aboard 292: The symbol which appears beside a light on a chart reads "Gp Fl R (2) 10 sec 160 ft 19M". Which characteristic does the light possess?
N a. It is visible two nautical miles. N b. Its distinguishing number is "19M". Y c. It has a red light. N d. It flashes once every ten seconds. 316: According to Buys Ballot's law, when an observer in the Northern Hemisphere experiences a northwest wind, the center of low pressure is located to the __________.
Y a. northeast N b. west-southwest N c. northwest N d. south-southeast 356: When facing into the wind in the Northern Hemisphere the center of low pressure lies __________.
N a. directly in front of you N b. directly behind you N c. to your left and behind you Y d. to your right and behind you 366: If an observer in the Northern Hemisphere faces the surface wind, the center of low pressure is to his______________.
N a. left, slightly behind him Y b. right, slightly behind him N c. left, slightly in front of him N d. right, slightly in front of him 435: If an observer is at 35°N latitude, his zenith is __________.
N a. 55°S of the celestial equator N b. at the north celestial pole Y c. 35°N of the celestial equator N d. 55°N of the celestial equator 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 519: The chart of a beach area shows a very flat slope to the underwater beach bottom. What type of breakers can be expected when trying to land a boat on this beach?
N a. Surging Y b. Spilling N c. Plunging N d. Converging 535: The tropical year differs from which year by 20 minutes?
N a. Astronomical year N b. Natural year N c. Equinoctial year Y d. Sidereal year 540: A white buoy with an orange rectangle on it is used to indicate __________.
N a. danger N b. a controlled area N c. an exclusion area Y d. general information 548: When the declination of the Moon is 0°12.5'S, you can expect some tidal currents in Gulf Coast ports to __________.
N a. have either a double ebb or a double flood N b. become reversing currents Y c. become weak and variable N d. exceed the predicted velocities 552: A Mercator chart is a __________.
Y a. cylindrical projection N b. simple conic projection N c. polyconic projection N d. rectangular projection 595: In the navigational triangle, the angle at the elevated pole is the __________.
Y a. meridian angle N b. altitude N c. right ascension N d. azimuth angle 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 845: During one synodic rotation, a body makes one complete turn relative to the __________.
N a. Earth Y b. Sun N c. stars N d. vernal equinox 895: The ecliptic is __________.
Y a. the path the Sun appears to take among the stars N b. the path the Earth appears to take among the stars N c. a diagram of the zodiac N d. a great circle on a gnomonic chart 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 992: Which publication contains information on Naval Control of Shipping (NCS) in time of emergency or war?
Y a. Pub. 117, Radio Navigational Aids N b. Appropriate volume of the Sailing Directions N c. Pub. 102, International Code of Signals N d. Light List 1037: Generally speaking, a ship steaming across the North Pacific from Japan to Seattle is likely to experience __________.
N a. adverse currents for practically the entire crossing Y b. favorable currents for practically the entire crossing N c. favorable currents in the summer months and adverse currents in the winter months N d. variable currents having no significant effect on the total steaming time 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 1068: A vessel sighting a northern right whale dead ahead should __________.
N a. maintain course and speed Y b. alter course to give a wide clearance N c. report the whale's position to the Canadian Coast Guard N d. All of the above 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 1202: As shown in the illustration, which wind speeds are reported at position A? (D049NG )
N a. 10 knots Y b. 15 knots N c. 20 knots N d. 25 knots 1215: Daylight savings time is a form of zone time that adopts the time __________.
N a. two zones to the east N b. two zones to the west Y c. one zone to the east N d. one zone to the west 1217: What will be the velocity and direction of the tidal current at Old Ferry Point, NY, at 1340 EST (ZD +5) on 5 February 1983?
N a. 0.8 knot at 060°T N b. 0.8 knot at 240°T N c. 1.0 knot at 076°T Y d. 1.4 knots at 076°T 1261: A light having characteristics which include color variations is defined as __________.
N a. switching Y b. alternating N c. oscillating N d. fluctuating 1278: The difference between the heights of low and high tide is the __________.
N a. depth N b. distance Y c. range N d. period 1285: You are enroute to assist vessel A. Vessel A is underway at 5.5 knots on course 033°T, and bears 248°T at 64 miles from you. What is the time to intercept if you make 13 knots?
N a. 4h 55m N b. 4h 36m N c. 3h 59m Y d. 3h 44m 1310: An urgent marine storm warning message would be broadcast on __________.
N a. 2670 KHz N b. 156.80 MHz (VHF-FM Ch. 16) Y c. 157.10 MHz (VHF-FM Ch. 22A) N d. None of the above 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 1362: Which type of cloud is indicated by the number 7 in illustration D039NG? (D039NG )
N a. Cirrostratus N b. Altocumulus Y c. Cumulus N d. Cumulonimbus 1396: On the approach of a warm front the barometric pressure usually __________.
Y a. falls N b. rises N c. is steady N d. is unreliable 1490: In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a __________.
N a. quick flashing light N b. long flashing light Y c. composite group flashing (2 + 1) light N d. group flashing 1654: Which weather element cannot be measured accurately while on board a moving vessel?
Y a. Visibility N b. Temperature N c. Wind direction N d. Atmospheric pressure 1654: Which weather element cannot be measured accurately while on board a moving vessel?
Y a. Visibility N b. Temperature N c. Wind direction N d. Atmospheric pressure 1660: Which of the following is TRUE of advection fog?
N a. It commonly occurs on coastal waters during cold seasons. N b. It moves in a bank or dense cloud. N c. It is caused by warmer air moving to a cooler location. Y d. All of the above 1665: Air circulation is caused or affected by __________.
N a. the rotation of the earth on its axis N b. convection currents caused by differences in radiant heating between equatorial and polar regions N c. mountain ranges Y d. All of the above 1721: A storm's track is characterized by all of the following except __________.
N a. the direction the storm has come from N b. the direction in which the storm is moving Y c. the speed at which the storm is moving N d. the path taken by the storm 1909: In the horizon system of coordinates what is equivalent to the equator on the Earth?
N a. Prime vertical circle N b. Principal vertical circle N c. Parallels of altitude Y d. Horizon 2125: On charts of U.S. waters, a magenta marking is NOT used for marking a __________.
N a. radio beacon N b. lighted buoy Y c. 5-fathom curve N d. prohibited area 2258: The primary use of apparent time in marine navigation is to __________.
N a. calculate sunrise or sunset N b. determine zone time N c. enter an almanac Y d. determine the time of meridian transit 2319: In low latitudes, the new Moon will always rise at about __________.
Y a. sunrise N b. 1200 LMT N c. sunset N d. 2400 LMT 2439: Which statement about the time diagram in illustration D008NG is TRUE? (D008NG )
Y a. You are in east longitude. N b. The Sun is setting for you. N c. Your date is different from the Greenwich date. N d. The GHA is approximately 160°. 2450: You are on course 180°T and take a relative bearing of a lighthouse of 225°. What is the true bearing of the lighthouse?
Y a. 045° N b. 135° N c. 180° N d. 270° 2474: A vessel is heading magnetic north and its magnetic compass indicates a heading of 356°. What action should be taken to remove this error during compass adjustment?
N a. If the blue ends of the magnets are to port, and the athwartships tray is at the top, you should remove some of the magnets. Y b. If the blue ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should remove some magnets. N c. If the red ends of the magnets are to starboard, and the athwartships tray is at the bottom, you should reverse the magnets. N d. If the blue ends of the magnets are to starboard, you should raise the athwartships tray. 2780: You are pushing a tow ahead and passing close to another towboat which is pushing ahead in the same direction (you are overtaking). After the towheads pass close alongside __________.
N a. you will gain speed N b. both boats will gain speed N c. the tows will tend to drift apart Y d. the tows will tend to drift together 2804: The altitude at LAN may be observed by starting several minutes in advance and continuing until a maximum altitude occurs. This procedure should not be used __________.
N a. when the declination and latitude are of different names N b. when the declination is greater than and the same name as the latitude N c. if the vessel is stopped or making bare steerageway Y d. on a fast vessel on northerly or southerly headings 2902: The direction a vessel is pointed at any given time is the __________.
N a. course N b. track Y c. heading N d. course over the ground 2949: On 13 November 1981 you observe a back sight of the upper limb of the Sun. The sextant altitude (hs) is 109°26.3'. The height of eye is 66 feet, and the index error is 2.0' on the arc. What is the observed altitude (HO)?
N a. 70°56.6' N b. 70°38.0' Y c. 70°27.2' N d. 70°23.2' 2954: You are inbound in a channel marked by a range. The range line is 309°T. You are steering 306°T. The range appears as shown and is closing. Which action should you take? (D047NG )
N a. Continue on the present heading until the range is in line then alter course to the left. N b. Immediately alter course to the right to bring the range in line. Y c. Continue on course until the range is closed, then alter course to the right. N d. Immediately alter course to 309°T. 2981: The maritime radio system consisting of a series of coast stations transmitting coastal warnings is called __________.
Y a. NAVTEX N b. HYDROLANT/HYDROPAC N c. NAVAREA N d. SAFESEA 3025: You determine your vessel's position by taking a range and bearing to a buoy. Your position will be plotted as a(n) __________.
Y a. estimated position N b. dead-reckoning position N c. fix N d. running fix