U.S.C.G. Merchant Marine Exam Master Uninspected Fishing ... · Q183-Navigation General-Oceans...

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U.S.C.G. Merchant Marine Exam

Master Uninspected Fishing Vessels

Q183 Navigation General – Oceans

(Sample Examination)

of 14 Q183 Navigation General – Oceans

9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2

Choose the best answer to the following Multiple Choice Questions.

1. Which characteristics will a lighted buoy that is to be left to starboard, when entering a U.S. port from seaward have?

o (A) A light characteristic of Morse (A) o (B) A white light • (C) A red light o (D) A green light

If choice C is selected set score to 1.

2. What is NOT an advantage of the rhumb line track over a great circle track?

• (A) Plots as a straight line on Lambert conformal charts o (B) Easily plotted on a Mercator chart o (C) Does not require constant course changes o (D) Negligible increase in distance on east-west courses near the equator

If choice A is selected set score to 1.

3. The climate of the northern Gulf coast __________.

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


4. Which describes a line of position derived by radar range from an identified point on a coast?

o (A) A line parallel to the coast o (B) Straight line • (C) Arc o (D) Parabola


5. The dry-bulb temperature is 78°F (26°C) and the wet-bulb temperature is 68°F (20°C). What is the relative humidity?

o (A) 10% o (B) 24% o (C) 56% • (D) 60%

If choice D is selected set score to 1.


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Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 6. Weather conditions in the middle latitudes generally move in which direction?

o (A) Westward o (B) Northward o (C) Southward • (D) Eastward


7. Which topmark shown in illustration D023NG below identifies an isolated danger?

o (A) A • (B) B o (C) C o (D) D

If choice B is selected set score to 1.

8. 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) FALLWARN o (C) NUCLEAR o (D) FALLOUT


9. Which type of daymark is used to mark the starboard side of the channel when entering from sea?

o (A) Red and white octagon • (B) Red triangle o (C) Black and white diamond o (D) Green square


10. Which is TRUE of an alternating light?

o (A) It marks an alternate lesser used channel • (B) It shows a light that changes color o (C) It is used as a replacement for another light o (D) It shows a light with varying lengths of the lighted period



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Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 11. Which of the following statements is TRUE regarding automatic identification systems (AIS)?

o (A) AIS is always required to be operating if the vessel is within 100 nautical miles of the coastline.

• (B) The master may, at his/her discretion, turn off the AIS if he/she believes that it may compromise the safety or security of the vessel.

o (C) AIS is always required to be operating if the vessel is in or in the vicinity of a VTS area. o (D) Under no circumstances shall AIS be turned off while underway as this could endanger the

vessel and those around her.


12. You are steaming in the open ocean of the North Pacific between the Aleutian Chain and Hawaii. A warning broadcast indicates that an earthquake has occurred in the Aleutians and has generated a tsunami that is predicted to hit Hawaii. What action is necessary for the ship's safety?

o (A) Prepare for sudden, high-velocity wind gusts from rapidly changing directions. o (B) Securely stow all loose gear, check deck lashings, and prepare for extreme rolls. • (C) No special action as tsunamis are inconspicuous in the open ocean o (D) Calculate the tsunami's ETA at your position and turn to a course that will head into the

Tsunami.


13. Which is TRUE concerning the magnetic information on a chart?

o (A) It may be indicated by isogonic lines o (B) It can be found in the center(s) of the compass rose(s) o (C) It may be found in a note on the chart • (D) All of the above


14. Which term describes the phenomenon where the atmospheric pressure is higher than that of other surrounding regions?

• (A) A high pressure area; an anticyclone; or a "high" o (B) A low front or an occluded front o (C) The "doldrums" o (D) The "trade winds"



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Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 15. Which part of a sextant is mounted directly over the pivot of the index arm?

• (A) The index mirror o (B) The micrometer drum o (C) The horizon glass o (D) The telescope


16. How many characters does the short text messaging feature of the automatic identification system (AIS) allows for?

o (A) 56 characters o (B) 64 characters o (C) 128 characters • (D) 158 characters


17. In high latitudes, celestial observations can be made over a horizon covered with pack ice by bringing the sun tangent to the ice and __________.

• (A) using a dip correction based on the height of eye above the ice o (B) doubling the semidiameter correction o (C) using a dip correction from table 22 in Bowditch Vol. II o (D) adding 30° of arc to the sight


18. Which condition would most likely result in fog?

o (A) Dew point falling below the air temperature o (B) Airborne dust particles • (C) Warm moist air blowing over cold water o (D) Warm moist air blowing over warm water


19. Which is TRUE concern the horizon glass of a sextant?

o (A) It is mounted on the index arm • (B) It is silvered on its half nearer the frame o (C) It is between the horizon and the shade glasses o (D) It is a movable bar the same material as the frame



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 20. Where will you find information about the duration of slack water?

o (A) American Practical Navigator o (B) Sailing Directions • (C) Tidal Current Tables o (D) Tide Tables


21. Weather systems in the middle latitudes generally travel in which direction?

o (A) East to West o (B) North to South • (C) West to East o (D) South East to North West


22. The Light List shows a lighted aid to navigation on the left bank. This means that the light can be seen on the port side of a vessel under which condition?

o (A) The vessel is crossing the river o (B) The vessel is proceeding from seaward • (C) The vessel is descending the river o (D) The vessel is ascending the river


23. The datum from which the predicted heights of tides are reckoned in the tide tables is the same as that used for the charts of the locality. The depression of the datum below mean sea level for Hampton Roads, Virginia is __________.

o (A) between 1.9 and 3.2 feet o (B) between -.7 and +.5 feet • (C) 1.2 feet o (D) 4.1 feet


24. What is the approximate geographic range of Shinnecock Light, NY, if your height of eye is 24 feet (7.3 meters)? Refer to "Reprints from the LIGHT LISTS AND COAST PILOTS".

o (A) 8.7 nm o (B) 9.9 nm o (C) 14.4 nm • (D) 15.9 nm



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 25. When using a buoy as an aid to navigation which of the following should be considered?

o (A) The buoy should be considered to be in the charted position if it has been freshly painted. o (B) The buoy should be considered to always be in the charted position. o (C) If the light is flashing the buoy should be considered to be in the charted location. • (D) The buoy may not be in the charted position.


26. Which type of precipitation occurs only in thunderstorms with strong convection currents that convey raindrops above and below the freezing level?

• (A) Hail o (B) Rime o (C) Freezing rain o (D) Sleet


27. While steering a course of 150°T, you wish to observe a body for a latitude check. What would the azimuth have to be?

o (A) 150°T o (B) 090°T o (C) 240°T • (D) 000°T


28. Under the IALA cardinal system, a mark with quick white light showing 3 flashes every 10 seconds indicates that the safest water in the area is in which location?

o (A) The south side of the mark o (B) The north side of the mark o (C) The west side of the mark • (D) The east side of the mark


29. The error in a sextant altitude caused by refraction is greatest when the celestial body is in which location?

o (A) High in the sky o (B) Rising above 45o elevation o (C) At or near transit • (D) Near the horizon



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 30. Which term is defines the ocean bottom that extends from the shoreline out to an area where there

is a marked change in slope to a greater depth?

o (A) Offshore terrace o (B) Abyssal plain • (C) Continental shelf o (D) Borderland


31. Weather information provided by the National Weather Service (NWS) advisories should be used along with which other source of information?

o (A) Any U.S. Coast Pilot • (B) Weather maps and local knowledge o (C) The Tide Tables and Tidal Current Tables o (D) The local Notice to Mariners


32. A Doppler log in the volume reverberation mode indicates __________.

o (A) speed being made good o (B) the set of the current o (C) the depth of the water • (D) speed through the water


33. What causes permanent magnetism on a vessel?

• (A) The earth's magnetic field affecting the ship's hard iron during construction o (B) The horizontal component of the earth's magnetic field acting on the horizontal soft iron o (C) The operation of electrical equipment and generators on board ship o (D) The vertical component of the earth's magnetic field acting on the vertical soft iron


34. What do the numbers on isobars indicate?

o (A) Wind speed • (B) Barometric pressure o (C) Temperature o (D) Rain in inches



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 35. Where is the navigable semicircle of a typhoon in the Southern Hemisphere located?

o (A) Ahead of the typhoon, measured from the storm's track to 90° on each side • (B) To the right of the storm's track o (C) To the left of the storm track o (D) Behind the typhoon, measured from 90° to 180°From each side of the storm's track


36. Apparent wind speed blowing across your vessel while underway can be measured by which instrument?

• (A) anemometer o (B) thermometer o (C) wind vane o (D) barometer


37. On 16 January, you take a sight of a star. The sextant altitude (hs) is 4°33.0'. The temperature is -10°C, and the barometer reads 992 millibars. The height of eye is 42 feet. The index error is 1.9' off the arc. What is the observed altitude (Ho)?

o (A) 4°10.2' o (B) 4°14.3' • (C) 4°17.0' o (D) 4°24.1'


38. You are steering a southerly course, and you note that the chart predicts an easterly current. Without considering wind, how may you allow for the set?

• (A) Head your vessel slightly to the right o (B) Decrease your speed o (C) Increase your speed o (D) Head your vessel slightly to the left


39. You are in the Northern Hemisphere and a tropical wave is located 200 miles due east of your position. Where will the wave be located 12 hours later?

o (A) Farther away to the east o (B) In the same position o (C) Farther away to the west • (D) Nearby to the east



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 40. What do clear skies, with the exception of a few cumulus clouds indicate?

o (A) Rain expected o (B) Fog setting in • (C) Fair weather o (D) Hurricane weather


41. When changing from a compass course to a true course, which should you apply?

o (A) A correction for the direction of current set • (B) Both variation and deviation o (C) Deviation only o (D) Variation only


42. An ECDIS is required to display which information?

o (A) Waypoints o (B) Meteorological data o (C) Radar targets • (D) Soundings


43. What color lights do lighted information markers display?

• (A) White lights o (B) Green lights o (C) Yellow lights o (D) Red lights


44. Under the U.S. Aids to Navigation System, what does a lighted buoy with a spherical topmark mark indicate?

o (A) The position of underwater cables o (B) A hazard to navigation • (C) Safe water o (D) The port side of the channel



9/4/2019

Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2 45. On a working copy of a weather map what color is the line that represents a stationary front?

o (A) Blue o (B) Purple • (C) Alternating red and blue o (D) Red


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

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


47. A ship is in longitude 54°00'W on a true course of 090°. The ship's clocks are on the proper time zone. At what longitude should the clocks be changed to maintain the proper zone time?

• (A) 52°30'W o (B) 45°00'W o (C) 60°00'W o (D) 67°30'W


48. Which agency publishes the Light Lists?

o (A) Army Corps of Engineers o (B) Oceanographic Office o (C) National Ocean Service • (D) United States Coast Guard


49. Under the IALA-A Buoyage System, when entering from seaward a lateral system buoy to be left to port may display which topmark shown in illustration D046NG below?

o (A) A • (B) B o (C) C o (D) D



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Q183-Navigation General-Oceans U.S.C.G. Merchant Marine Exam Master Uninspected Fishing Vessels Illustrations: 2

50. Under the U.S. Aids to Navigation System, which category is a yellow buoy?

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



9/4/2019

National Maritime Center

Serving Our Nation's Mariners

8/29/2018

D023NG

Adapted for testing purposes only from BOWDITCH, The American Practical Navigator,

An Epitome of Navigation, Volume I, 1984 Edition

Copyright © 1984 by the Defense Mapping Agency Hydrographic/Topographic Center

Further reproduction prohibited without permission of 14 Q183 Navigation General – Oceans

National Maritime Center

Serving Our Nation's Mariners

5/7/2019

D046NG

Adapted for testing purposes only from CUTLER, Dutton’s Nautical Navigation, 15th edition

Copyright © 2004 by the U.S. Naval Institute

Further reproduction prohibited without permission of 14 Q183 Navigation General – Oceans

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