Tuesday, 15 November 2016

MARINA Deck Reviewer 301-350

301) The line which connects the points of zero magnetic dip is __________. the magnetic equator

302) The magnetic compass error which changes with the geographical location of your vessel is called __________. variation

303) The principal purpose of magnetic compass adjustment is to __________. reduce the deviation as much as possible

304) The total magnetic effects which cause deviation of a vessel's compass can be broken down into a series of components which are referred to as __________. coefficients

305) What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism? Heeling magnets

306) Which information does the outer ring of a compass rose on a nautical chart provide? True directions

307) You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic north but the compass reads 356°. Which action should be taken? Use the athwartships magnets and adjust the compass until it reads 358°.

308) You have completed the magnetic compass adjustments on magnetic east and magnetic south. The vessel is now steady on magnetic west but the compass reads 276°. What action should be taken? Adjust the compass with the fore-and-aft magnets until the compass reads 273°.

309) The line connecting the points of the earth's surface where there is no dip is the __________. magnetic equator

310) The lubber's line of a magnetic compass __________. indicates the vessel's heading

311) The lubber's line on a magnetic compass indicates __________. the direction of the vessel's head

312) The permanent magnetism of a vessel may change in polarity due to __________. being struck by lighting

313) To find a magnetic compass course from a true course you must apply __________. deviation and variation

314) True heading differs from magnetic heading by __________. variation

315) When a vessel changes course from one cardinal heading to another cardinal heading while adjusting the compass, which action should be taken? After the new heading is reached, the vessel should steam on that course for at least two minutes before the adjustment.

316) Which magnetic compass corrector(s) can be set while the vessel is on a heading of magnetic north or magnetic south? Heeling magnets

317) The chart indicates variation was 3 deg. 45' E in 1993, the annual change is increasing 6'. If you use the chart in 2003, how much variation should you apply? 4 deg. 45' E

318) Methods of inducing magnetism in an iron bar for making magnets, include the following EXCEPT _____________. The method of divided touch

319) These are physical facts about the Earth's magnetic fields/Poles. EXCEPT ________ The two poles are not diametrically opposite to each other

320) It is a semi-circular deviation which is proportional to the same of the compass has the coefficient B

321) Deviation cannot be totally eliminated but can be reduced to a minimum. The deviation value is called residual deviation

322) The theory of magnetism which thought that the atoms within the molecules are themselves poles or having two magnetic poles, and from themselves into an irregular closed circuits of group domain theory

323) The theory on magnetism which thought that the atoms within the molecules are themselves dipoles, or having two magnetic poles, and form themselves into an irregular closed circuits or group _____ domain theory

324) The soft iron spheres used for compensating against the effect of horizontal soft iron in the ship quadrantal corrector

325) Which magnetic compass corrector(s) can be set while the vessel is on a heading magnetic North or Magnetic South heeling magnets

326) The direction of the meridian through the observer towards the geographic pole is __________? true north

327) Magnetic compass deviation _____________? is the angular difference between magnetic north and compass north

328) Every "field of the magnet" contains something which is called magnetic flux

329) Every field of magnet contains something which is called____ magnetic flux

330) It is alternatively defines as the line joining places where there is no dip, and for this season it is sometimes called ACLINIC LINE magnetic equator

331) It is a valuable reference in navigation, for it provides the directive force for the magnetic compass horizontal component

332) Since all red poles of magnets are attracted toward the Earth's North, it follows from the law of attraction and repulsion, that the Earth's North Pole is Blue

333) Since all red poles of magnets are attracted toward the earth's north, it follows from the law of attraction and repulsion, that the earth north pole is____ blue

334) The angle of which a freely suspended magnet makes with horizontal or the angle between the direction of the Earth's field at any place and the horizontal is called angle of dip

335) The angle of which a freely suspended magnet makes with the horizontal, or the angle between the direction of the earth's field at any place and the horizontal is called____ angle of dip

336) Deviation is the horizontal angle at any place between the directions of _________? the magnetic north and the compass north

337) Lines on the magnetic chart where the true meridian and magnetic meridian coincide thus having a zero variation is referred to as. agonic lines

338) Reducing the strength of a magnetic field decreases the number of cause in that field of the process is called degaussing

339) Basic principles of a magnet is, like poles repel and unlike poles attract, the force between magnetic poles being inversely proportional to the square of their distance apart

340) When crossing the magnetic equator the __________. heeling magnet should be inverted

341) As a vessel changes course to starboard, the compass card in a magnetic compass __________. remains aligned with compass north

342) At the magnetic equator there is no induced magnetism in the vertical soft iron because __________. there is no vertical component of the Earth's magnetic field

343) By convention, the Earth's north magnetic pole is colored __________. blue

344) By convention, the north seeking ends of a compass' magnets are colored __________. red

345) How is variation indicated on a small-scale nautical chart? Isogonic lines

346) If a ship is proceeding towards the magnetic equator, the uncorrected deviation due to permanent magnetism __________. decreases

347) Magnetic dip is a measurement of the angle between the __________. horizontal and the magnetic line of force

348) Magnets are placed in horizontal trays in the compass binnacle to compensate for the __________. permanent magnetism of the vessel

349) The compass deviation changes as the vessel changes __________. heading

350) The magnetic compass operates on the principle that __________. unlike poles attract

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