U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels ... · o (A) wind's speed must be zero o...

National Maritime Center Serving Our Nation’s Mariners

U.S.C.G. Merchant Marine Exam

Mate Offshore Supply Vessels

Q212 Navigation General – Oceans

(Sample Examination)

of 17 Q212 Navigation General – Oceans

9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1

Choose the best answer to the following Multiple Choice questions.

1. The difference (measured in degrees) between the GHA of the body and the longitude of the observer is the __________.

o (A) right ascension o (B) SHA of the observer • (C) meridian angle o (D) zenith distance

If choice C is selected set score to 1.

2. The apparent wind's speed can be zero, but only when two conditions are present. One condition is that the true __________.

o (A) wind's speed must be zero o (B) wind must be from dead ahead • (C) wind's speed equals the ship's speed o (D) wind must be on the beam


3. You take a bearing of 356° of a lighthouse. What bearing of another object would give the best fix?

o (A) 013° o (B) 201° o (C) 176° • (D) 082°

If choice D is selected set score to 1.

4. The climate of the eastern Gulf coast __________.

o (A) is humid and subtropical throughout the year o (B) has a Mediterranean type of climate • (C) varies from warm to subtropical o (D) has an east coast marine type of climate


5. You are in a buoyed channel at night and pass a lighted buoy with an irregular characteristic. Who should you report this to?

o (A) The Corps of Engineers o (B) The National Ocean Service o (C) The harbor master • (D) The Coast Guard



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 6. Entering from seaward, what do triangular-shaped daymarks mark?

o (A) The centerline of the channel o (B) An obstruction where the preferred channel is to starboard • (C) The starboard side of the channel o (D) Any special purpose areas


7. In which source could you find the number of a chart for a certain geographic area?

o (A) Chart No. 1 o (B) American Practical Navigator • (C) Catalog of Charts o (D) U.S. Coast Guard Light List


8. Which of the following typically happens to the barometric pressure after a cold front passes?

o (A) Remains the same • (B) Rises, often quite rapidly, with clearing skies o (C) It fluctuates o (D) Remains the same, with clouds forming rapidly

If choice B is selected set score to 1.

9. Which observation is NOT used in determining the wind direction?

• (A) Swells o (B) Whitecaps o (C) Waves o (D) Low clouds

If choice A is selected set score to 1.

10. When your vessel is on the storm track but behind the storm's center the __________.

o (A) barometer rises o (B) wind direction remains steady o (C) wind speed decreases • (D) All of the above



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 11. By convention, what color is the north seeking end of a compass' magnet?

o (A) Blue o (B) Black o (C) White • (D) Red


12. How often are the time signals broadcast by WWV and WWVH transmitted?

o (A) They are transmitted every 15 minutes o (B) They are transmitted every hour • (C) They are transmitted continuously throughout day o (D) They are transmitted every 30 minutes


13. When is an air mass termed "warm"?

o (A) If the mass is above 70°F o (B) If it originated in a high pressure area o (C) If it originated in a low pressure area • (D) If the ground over which it moves is cooler than the air


14. What is Apparent time based upon?

o (A) The movement of the first point of Aries o (B) The Moon's motion in relation to the Sun • (C) The visible sun moving along the ecliptic o (D) A fictitious sun moving along the celestial equator


15. If your weather bulletin shows the center of a low pressure area to be 100 miles due east of your position, what winds can you expect in the Northern Hemisphere?

o (A) East to northeast o (B) East to southeast o (C) South to southeast • (D) North to northwest



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 16. What is characteristic of an isophase light?

• (A) 1 sec. flash, 1 sec. eclipse o (B) 6 sec. flash, 3 sec. eclipse o (C) 4 sec. flash, 2 sec. eclipse, 3 sec. flash, 2 sec. eclipse o (D) 2 sec. flash, 5 sec. eclipse


17. The equation of time is 8m 40s. The apparent Sun is ahead of the mean Sun. If you are on the central meridian of your time zone, the apparent Sun will cross your meridian at what time?

• (A) 11-51-20 ZT o (B) 12-00-00 ZT o (C) 12-04-20 ZT o (D) 12-08-40 ZT


18. What is the purpose of the "set" hand on an aneroid barometer?

o (A) To adjust the barometer o (B) To provide a correction for height above sea level • (C) To indicate any change in the reading of the barometer o (D) To provide a correction for temperature changes


19. Which form of cloud that is often known as "mackerel sky" is generally associated with fair weather?

o (A) Cumulonimbus o (B) Stratus o (C) Nimbostratus • (D) Cirrocumulus


20. You are steaming southward along the west coast of the United States when you encounter a buoy showing a flashing red light. Which is TRUE concerning the buoy?

o (A) The buoy should be left on the vessel's starboard side • (B) The buoy should be left on the vessel's port side o (C) The buoy can be on either side well clear o (D) The buoy can remain on either side close aboard



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 21. Under the U.S. Aids to Navigation System, which category is a yellow buoy?

o (A) A junction buoy o (B) A cardinal mark o (C) A safe water buoy • (D) A special purpose mark


22. You are underway on course 050°T and your maximum speed is 12 knots. The eye of a hurricane bears 120°T, 110 miles from your position. The hurricane is moving towards 285°T at 25 knots. If you maneuver at 12 knots to avoid the hurricane, what could be the maximum CPA?

• (A) 77 miles o (B) 82 miles o (C) 87 miles o (D) 93 miles


23. Which is TRUE concerning the flow of air around an anticyclone in the Southern Hemisphere?

o (A) Air flows counterclockwise and inward o (B) Air flows in a clockwise and outward • (C) Air flows counterclockwise and outward o (D) Air flows clockwise and inward


24. The distance to the nearest vertex from any point on a great circle track cannot exceed which distance?

• (A) 5400 nautical miles o (B) 5840 nautical miles o (C) 6080 nautical miles o (D) 10,800 nautical miles


25. On an isomagnetic chart, which term is used for the line of zero variation?

o (A) The zero variation line o (B) A variation line o (C) An isogonic line • (D) An agonic line



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 26. When trying to sight a lighthouse you notice a glare from a town in the background. How does this

affect the range at which the light may be sighted?

o (A) Increased slightly due to extra lighting o (B) Unchanged o (C) Increased if the light is red or green due to contrast with the glare • (D) Considerably reduced and difficult to distinguish


27. Which table is NOT found in the U.S. Coast Pilots?

o (A) Meteorological table • (B) Luminous range table o (C) Climatological table o (D) Coastwise distance table


28. Which class of tide prevails in the greatest number of important harbors on the Atlantic Coast?

o (A) Interval o (B) diurnal o (C) Mixed • (D) Semidiurnal


29. What is the name of the region of high pressure extending around the Earth at about 35°N latitude?

o (A) The prevailing westerlies o (B) The doldrums • (C) The horse latitudes o (D) The troposphere


30. You are approaching Chatham Strait from the south in foggy weather. You have Coronation Island and Hazy Islands on the radar. Suddenly the radar malfunctions. You then resort to using whistle echoes to determine your distance off Coronation Island. Your stopwatch reads 16.3 seconds for the echo to be heard. How far are you off Coronation Island?

o (A) 1.0 mile • (B) 1.5 miles o (C) 2.0 miles o (D) 2.5 miles



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 31. Which name is given to the pressure-sensitive element of an aneroid barometer?

o (A) Pressure bellows • (B) Sylphon cell o (C) Constant pressure capsule o (D) Column of mercury


32. Which text contains information on search and rescue procedures and special, local communications used in Mexican waters?

o (A) International Code of Signals (Pub 102) o (B) International Aeronautical and Maritime Search and Rescue Manual • (C) Sailing Directions (Planning Guides) o (D) World Port Index


33. At about GMT 1436, on 3 December, the lower limb of the Moon is observed with a sextant having an index error of 2.5' on the arc. The height of eye is 32 feet. The sextant altitude (hs) is 3°38.8'. What is the observed altitude?

o (A) Ho 4°18.6' • (B) Ho 4°29.1' o (C) Ho 4°36.3' o (D) Ho 4°42.2'


34. 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 and running time at 13 knots to intercept vessel A?

o (A) 115°, 5h 45m o (B) 158°, 7h 20m • (C) 115°, 7h 20m o (D) 158°, 5h 45m



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 35. You are bound for Baltimore via Cape Henry on a 15 knot ship. If the flood at Chesapeake Bay

entrance begins at 1800 EST (ZD +5), at what time would you depart from the Chesapeake Bay entrance to have the most favorable current?

o (A) 1700 hours o (B) 1800 hours o (C) 1900 hours • (D) 2030 hours


36. You have been observing your radar screen and notice that a contact on the screen has remained in the same position, relative to you, for several minutes. Your vessel is making 10 knots through the water. Which statement is TRUE?

o (A) The contact is dead in the water. • (B) The contact is on the same course and speed as your vessel. o (C) The contact is on a reciprocal course at the same speed as your vessel. o (D) The radar is showing false echoes and is probably defective.


37. A List of Lights entry (L Fl) is a single flashing light which shows a long flash of not less than which duration?

o (A) 1.0 second duration o (B) 1.5 seconds duration • (C) 2.0 seconds duration o (D) 3.0 seconds duration


38. In Region A of the IALA Buoyage System, when entering from seaward, the port side of a channel would be marked by which buoy?

o (A) A red conical buoy • (B) A red can buoy o (C) A black can buoy o (D) A black conical buoy


39. In illustration D051NG below, why was the position labeled "D" plotted?

o (A) A dead reckoning position is plotted within 30 minutes of a running fix • (B) A dead reckoning position is plotted for each course change o (C) The vessel's speed changed at 1125 o (D) All of the above



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 40. A mooring buoy, if lighted, shows which color light?

o (A) Yellow • (B) White o (C) Any color except red or green o (D) Blue


41. A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has which error?

o (A) Prismatic error • (B) Side error o (C) Centering error o (D) Error of perpendicularity


42. While on a course of 192°T, a light bears 11° on the starboard bow at a distance of 12.7 miles. What course should you steer to pass 3 miles abeam of the light leaving it to starboard?

o (A) 173°T o (B) 185°T • (C) 189°T o (D) 167°T


43. By what means are indications of the master gyrocompass sent to remote repeaters?

o (A) by azimuth motor o (B) by follow-up system o (C) by phantom element • (D) by transmitter


44. Which term describes the temperature at which the air is saturated with water vapor and below which condensation of water vapor will occur?

• (A) Dew point o (B) Vapor point o (C) Precipitation point o (D) Absolute humidity



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 45. How can the accuracy of an azimuth circle be checked?

o (A) sighting a terrestrial range in line and comparing the observed bearing against the charted bearing

o (B) ensuring that the alignment marks on the inner face of the circle are in line with those on the repeater on relative bearings of 000° and 090°

• (C) comparing observed azimuths at different altitudes with computed values at the times of observation to see if the difference is constant

o (D) aligning the relative bearing markings so that 000° is on the lubber's line and the line of sight passes over the center of the compass


46. Lines drawn through points on the Earth having the same atmospheric pressure are known by which term?

o (A) Isothermal o (B) Millibars o (C) Seismics • (D) Isobars


47. A tropical storm is a tropical cyclone that generates winds of which speed?

o (A) Between 64 and 75 knots o (B) Over 75 knots o (C) Between 20 and 33 knots • (D) Between 34 and 63 knots


48. Under the IALA-A Buoyage System, a green spar buoy with a triangular topmark would indicate that the buoy __________.

o (A) is on the north side of a point of interest o (B) is marking the preferred channel • (C) should be left to port when heading out to sea o (D) may be left close aboard on either side



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 49. You are on course 251°pgc and 241° per magnetic compass, when you observe a range in line

bearing 192°pgc. The chart indicates that the range is in line on a bearing of 194°T. The variation is 16°E. What is the deviation of the magnetic compass?

o (A) 2°E o (B) 2°W • (C) 4°W o (D) 10°W


50. Which is TRUE concerning the length of a wave?

o (A) It is measured from crest to trough o (B) It is the length of the wave's trough o (C) It is the length of the wave's crest • (D) It is measured from crest to crest


51. What does a barometer showing falling pressure indicate?

o (A) The approach of a high pressure system • (B) The approach of a low pressure system o (C) A low dew point o (D) A high dew point


52. Your vessel is on course 150°T, speed 17 knots. The apparent wind is from 40° off the starboard bow, speed 15 knots. What is the speed of the true wind?

o (A) 9.0 knots o (B) 10.2 knots • (C) 11.0 knots o (D) 12.0 knots


53. In waters where the cardinal system is used where would you expect to find danger?

• (A) Lying to the south of a northern quadrant buoy o (B) Lying to the south of an eastern quadrant buoy o (C) Lying to the east of an eastern quadrant buoy o (D) Beneath or directly adjacent to the buoy



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 54. You will be advised of any hazardous areas due to the fallout of a nuclear explosive by a message

with which code word?

• (A) MERWARN o (B) FALLOUT o (C) NUCLEAR o (D) FALLWARN


55. Which type of weather could you expect soon after seeing "hook" or "comma" shaped cirrus clouds?

o (A) The formation of a tropical depression o (B) Continuing fog and rain o (C) Clearing with the approach of a cold front • (D) Rain with the approach of a warm front


56. Where can the annual change in variation for an area be found?

• (A) The center of the compass rose on a chart of the area o (B) The compass deviation table o (C) Variation does not change. o (D) The handbook for Magnetic Compass Adjustment, Pub 226


57. The Moon and Sun are in line over your meridian. Tomorrow when the Sun is over your meridian, where will the Moon be?

o (A) Over the meridian too o (B) About 11° west of the meridian o (C) About 6°West of the meridian • (D) About 12°East of the meridian


58. What is the name given to lines on a chart which connect points of equal magnetic variation?

o (A) Magnetic latitudes o (B) Magnetic declinations • (C) Isogonic lines o (D) Dip lines



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 59. Which fog is produced by warm moist air passing over a cold surface?

o (A) Conduction fog • (B) Advection fog o (C) Radiation fog o (D) Frontal fog


60. If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE?

o (A) Compass north will be true north. • (B) Compass error and variation are equal. o (C) Variation will equal deviation. o (D) There will be no compass error.


61. Which is the dividing meridian between zone descriptions -7 and -8?

• (A) 112°30'E o (B) 118°30'E o (C) 120°00'E o (D) 116°30'W


62. 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?

o (A) 356° • (B) 003° o (C) 022° o (D) 038°


63. What classification of tropical cyclone would have closed isobars, counter clockwise rotary circulation, and sustained winds between 34 and 63 knots?

o (A) A hurricane • (B) A tropical storm o (C) A tropical disturbance o (D) A tropical depression



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 64. You are steaming along the coast of Ireland in the Irish Sea. You sight a lighted buoy with a white

flashing light showing a group of two flashes. The buoy indicates you should take which action?

o (A) You must pass north of the buoy • (B) You should pass well clear on either side of the buoy o (C) You must pass south of the buoy o (D) You must pass the buoy close to starboard


65. Swell is the rise and fall of the ocean's surface due to __________.

o (A) fetch • (B) distant winds o (C) the pull of the moon o (D) local storms


66. As a Merchant Marine Officer you are expected to be able to do which of the following?

o (A) understand all broadcast weather warning information o (B) listen to weather forecasts on the radio while enroute o (C) obtain a weather forecast before setting out from port • (D) All of the above


67. In illustration D051NG below, why was the position labeled "C" plotted?

o (A) The vessel's speed changed o (B) The vessel's course changed form due North to due East • (C) Running fixes are better estimates of true position than dead-reckoning positions o (D) All of the above are correct


68. You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of radar?

• (A) 3 cm o (B) 10 cm o (C) Both 3 cm and 10 cm o (D) Signal does not depend on radar type.



9/4/2019

Q212 Navigation General-Oceans U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels Illustrations: 1 69. Which condition(s) is(are) necessary for the formation of dew?

• (A) Clear skies o (B) A surface warmer than the dew point of the air o (C) Moderate wind o (D) Available nuclei in the air


70. You are sailing south on the Intracoastal Waterway (ICW) when you sight a red nun buoy with a yellow square painted on it. Which of the following is TRUE?

• (A) You should leave the buoy on your port hand. o (B) The yellow square is in error and it should be a yellow triangle. o (C) The yellow is retro-reflective material used to assist in sighting the buoy at night. o (D) This buoy marks the end of the ICW in that geographic area.



9/4/2019

National Maritime Center

Serving Our Nation's Mariners

9/11/2018

D051NG

Adapted for testing purposes only

Further reproduction prohibited without permission of 17 Q212 Navigation General – Oceans

U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels ... · o (A) wind's speed must be zero o...

Documents

Transcript of U.S.C.G. Merchant Marine Exam Mate Offshore Supply Vessels ... · o (A) wind's speed must be zero o...