U.S.C.G. Merchant Marine Exam Second/Third Mate Of Unlimited Tonnage .

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 335. When operated over a muddy bottom, a fathometer may indicate which of the following?o oo(A) A shallow depth reading(B) Two depth readings(C) No depth reading(D) A zero depth readingIf choice B is selected set score to 1.36. By what means are indications of the master gyrocompass sent to remote repeaters? ooo(A) by transmitter(B) by phantom element(C) by follow-up system(D) by azimuth motorIf choice A is selected set score to 1.37. How can the accuracy of an azimuth circle be checked?o oo(A) aligning the relative bearing markings so that 000 is on the lubber's line and the line of sightpasses over the center of the compass(B) comparing observed azimuths at different altitudes with computed values at the times ofobservation to see if the difference is constant(C) sighting a terrestrial range in line and comparing the observed bearing against the chartedbearing(D) ensuring that the alignment marks on the inner face of the circle are in line with those on therepeater on relative bearings of 000 and 090 If choice B is selected set score to 1.38. A sidereal day is shorter than a solar day. What is the reason for this difference?oo o(A) Irregularities in the daily rotational rate of the Sun(B) The space motion of the solar system(C) The use of different reference points(D) The precession of the equinoxesIf choice C is selected set score to 1.39. What is the equivalent of 23 min. 20 sec. in arc units?o oo(A) 12 32'(B) 5 50'(C) 16 40'(D) 9 28'If choice B is selected set score to 1.7/22/2021Page 9 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 340. What must the owner or Master do if any of the towing vessel's required navigational safetyequipment fails during a voyage?ooo (A) Repair it at the earliest practicable time(B) Consider the state of the equipment in deciding whether it is safe for the vessel to proceed(C) Enter its failure in the log or other on board record(D) All of the aboveIf choice D is selected set score to 1.41. When recording the wind direction in the weather log, which information would you report? ooo(A) The direction the wind is blowing from(B) The duration of the maximum gust of wind(C) The wind chill factor(D) The direction the wind is blowing towardIf choice A is selected set score to 1.42. Some lights used as aids to marine navigation have a red sector to indicate a danger area. Thelimits of a colored sector of a light are listed in the Light List in which of the following manners?oo o(A) True bearings as observed from the light toward the ship(B) Geographical positions outlining the area of the sector(C) True bearings as observed from the ship toward the light(D) An outline of the area of the sectorIf choice C is selected set score to 1.43. When is the rhumb line distance the same as the great circle distance?ooo (A) The rhumb line distance is always longer than the great circle distance.(B) Course 090 T in high latitudes(C) Course 045 T in low latitudes(D) Course 180 T when you cross the equatorIf choice D is selected set score to 1.44. Red lights may appear on which buoys?oo o(A) Vertically striped buoys(B) Spherical buoys(C) Horizontally banded buoys(D) Yellow buoysIf choice C is selected set score to 1.7/22/2021Page 10 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 345. What is the primary source of the earth's weather?oo o(A) The solar system(B) The oceans(C) The sun(D) The moonIf choice C is selected set score to 1.46. You are steaming west in the South Atlantic in an extratropical cyclonic storm, and the wind is deadahead. According to the law of Buys Ballot, where does the center of low pressure lie?o oo(A) Dead ahead of you(B) To the south of you(C) To the north of you(D) Dead astern of youIf choice B is selected set score to 1.47. In which country would you expect the channels to be marked with the IALA-B Buoyage System?oo o(A) Poland(B) Morocco(C) Peru(D) Saudi ArabiaIf choice C is selected set score to 1.48. You are outbound in a channel marked by a range astern. The range line is 133 T. You are steering315 T and have the range in sight as shown in illustration D048NG below. What action should youtake?ooo (A) Come left to 313 T.(B) Come right until the range comes in line then alter course to 313 T.(C) Come right until the range comes in line then alter course to 317 T.(D) Come left to close the range then when on the range steer 313 T.If choice D is selected set score to 1.49. There are seven sources of error in the marine sextant. Of the four errors listed, which one isadjustable?oo o(A) Centering error(B) Prismatic error(C) Error of collimation(D) Graduation errorIf choice C is selected set score to 1.7/22/2021Page 11 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 350. The first point of Aries is the point where the Sun is at . ooo(A) 0o declination going to northerly declinations(B) maximum declination north(C) maximum declination south(D) 0o declination going to southerly declinationsIf choice A is selected set score to 1.51. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than whichduration?oo o(A) 1.0 second duration(B) 1.5 seconds duration(C) 2.0 seconds duration(D) 3.0 seconds durationIf choice C is selected set score to 1.52. When using GPS, how many theoretical position lines are required for a three-dimensional fix?ooo (A) 1(B) 2(C) 3(D) 4If choice D is selected set score to 1.53. What do the soft iron spheres mounted on arms on the binnacle compensate for?oo o(A) The residual deviation of the vessel(B) Magnetic fields caused by electrical currents in the vicinity(C) The induced magnetism in the horizontal soft iron(D) The vertical component of the permanent magnetism of the vesselIf choice C is selected set score to 1.54. Your vessel is participating in the Voluntary Observing Ship Program, at 0600 ZT on 31 Januaryyour position is LAT 00 49'S, LONG 84 27'E. You are preparing WS Form B-80 as seen inillustration D041NG below. How should you encode the first three groups after the call sign if youestimate the wind?ooo (A) 31063, 99049, 58427(B) 30243, 90008, 30848(C) 31003, 99049, 38427(D) 31003, 99008, 30844If choice D is selected set score to 1.7/22/2021Page 12 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 355. Which light characteristic may be used on a special purpose mark?o oo(A) Occulting(B) Fixed(C) Quick flashing(D) Equal intervalIf choice B is selected set score to 1.56. The velocity of the wind, its steady direction, and the amount of time it has blown determines whatabout a wind driven current? ooo(A) Its speed(B) Its density(C) Its deflection(D) Its temperatureIf choice A is selected set score to 1.57. On an isomagnetic chart, which term is used for the line of zero variation?o oo(A) The zero variation line(B) An agonic line(C) An isogonic line(D) A variation lineIf choice B is selected set score to 1.58. Charts should be corrected by using information published in which text?o oo(A) Coast Pilot(B) Notice to Mariners(C) Light List(D) American Practical NavigatorIf choice B is selected set score to 1.59. Which condition(s) is(are) necessary for the formation of dew?oo o(A) Available nuclei in the air(B) A surface warmer than the dew point of the air(C) Clear skies(D) Moderate windsIf choice C is selected set score to 1.7/22/2021Page 13 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 360. You are underway on course 050 T and your maximum speed is 13 knots. The eye of a hurricanebears 120 T, 100 miles from your position. The hurricane is moving towards 265 T at 25 knots. Whatcourse should you steer at 13 knots to have the maximum CPA?ooo (A) 306 T(B) 276 T(C) 299 T(D) 324 TIf choice D is selected set score to 1.61. You are entering an east coast port and see a buoy with a yellow triangle painted on it. What doesthe symbol indicate?o oo(A) The buoy designates a sharp turn in the channel(B) You are in the vicinity of the ICW(C) The buoy is a special mark(D) The buoy is off stationIf choice B is selected set score to 1.62. Given are the courses and speeds of 4 vessels. The navigator of which vessel would be required toknow the actual time of meridian transit in order to take an accurate observation at LAN ? ooo(A) C 349 T, Sp 25 knots(B) C 079 T, Sp 24 knots(C) C 101 T, Sp 7 knots(D) C 018 T, Sp 6 knotsIf choice A is selected set score to 1.63. Prior to reading an aneroid barometer, why should you tap the face lightly with your finger?ooo (A) To demagnetize the metal elements(B) To expose any loose connections(C) To contract and expand the glass face(D) To bring the pointer to its true positionIf choice D is selected set score to 1.64. A chart has extensive corrections to be made to it. When these are made and the chart is againprinted, what term is given to this chart issue?o oo(A) Reprint(B) New edition(C) Revised edition(D) First editionIf choice B is selected set score to 1.7/22/2021Page 14 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 365. The four standard light colors used for lighted aids to navigation are red, green, white, and.o oo(A) purple(B) yellow(C) blue(D) orangeIf choice B is selected set score to 1.66. By convention, what color is the south pole of a magnet painted?oo o(A) Black(B) Red(C) Blue(D) WhiteIf choice C is selected set score to 1.67. Swell is the rise and fall of the ocean's surface due to .ooo (A) fetch(B) the pull of the moon(C) local storms(D) distant windsIf choice D is selected set score to 1.68. The Light List indicates that a dayboard is a type TR-SY. Which action should you take?oo o(A) Look for a dayboard of type TR-TY to form a range(B) Expect a daymark with no lateral significance(C) Leave it to port when southbound on the Atlantic portions of the ICW(D) Pass it close aboard on either sideIf choice C is selected set score to 1.69. What is the standard atmospheric pressure as measured in inches of mercury? ooo(A) 29.92(B) 500.0(C) 760.0(D) 1013.2If choice A is selected set score to 1.7/22/2021Page 15 of 19Q114 Navigation General – Oceans

Q114 Navigation General - OceansU.S.C.G. Merchant Marine ExamSecond/Third Mate of Unlimited TonnageIllustrations: 370. The point on the celestial sphere that is directly over the observer is known by which term?oo o(A) Pole(B) Node(C) Zenith(D) NadirIf choice C is selected set score to 1.7/22/2021Page 16 of 19Q114 Navigation General – Oceans

National Maritime CenterServing Our Nation’s MarinersD030NGAdapted for testing purposes only from BOWDITCH, The American Practical Navigator,An Epitome of Navigation, Volume I, 1984 EditionCopyright 1984 by the Defense Mapping Agency Hydrographic/Topographic CenterFurther reproduction prohibited without permissionPage 17 of 198/30/2018Q114 Navigation General – Oceans

National Maritime CenterServing Our Nation’s MarinersD041NG9/6/2018Adapted for testing purposes only from U.S. Department of CommerceNational Oceanic and Atmospheric AdministrationNational Weather ServiceFurther reproduction prohibited without permissionPage 18 of 19Q114 Navigation General – Oceans

National Maritime CenterServing Our Nation’s MarinersD048NGAdapted for testing purposes only from BOWDITCH, The American Practical Navigator,An Epitome of Navigation, 2002 Bicentennial EditionCopyright 2002 by The National Imagery and Mapping Agency, U. S. GovernmentFurther reproduction prohibited without permissionPage 19 of 199/10/2018Q114 Navigation General – Oceans

o (D) North If choice B is selected set score to 1. 29. In which source could you find the number of a chart for a certain geographic area? o (A) U.S. Coast Guard Light List o (B) Chart No. 1 (C) Catalog of Charts o (D) American Practical Navigator If choice C is selected set score to 1. Page 7 of 19 Q114 Navigation General Oceans 7/22/2021