MARINA Deck Reviewer 201-250

201) What publication contains information about the port facilities in Cadiz, Spain? World Port Index

202) If the gyrocompass error is east, what describes the error and the correction to be made to gyrocompass headings to obtain true headings? The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true

203) The most accurate method of determining gyrocompass error while underway is by __________. comparing the gyro azimuth of a celestial body with the computed azimuth of the body

204) The reaction of a gyrocompass to an applied force is known as __________. precession

205) The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass? By mechanically or electrically applying forces to precess the gyroscope

206) Which statement about gyrocompass error is TRUE? The amount of the error and the sign will generally be the same on all headings.

207) Which statement about the gyrocompass is FALSE? Its accuracy remains the same at all latitudes.

208) The movement of axis of a free gyro when subjected to an angular force that is not coincident with the plane of rotation is called _________? precession

209) The vessel's compass direction at a time is referred to as __________.__. Heading

210) In which of the following is the compass card attached in the master gyro compass? sensitive element

211) The spin axis of a gyroscope tends to remain fixed in space in the direction in which it is started. How does this gyroscope become north seeking so that it can be used as a compass? By mechanically or electrically applying forces to precess the gyroscope

212) It is the distance that ship's compass platform moves in the direction of her original line of advance, measured from the point where is put over, for a given alternation of a course, is known as. advance

213) The gyro error introduce by ship's forward motion along its tracks also known as _________. speed error

214) A gyro compass operating properly, its rotor shaft is a aligned to ____________. North-South direction

215) When taking a compass error by amplitude in the higher latitudes when is the best time to take the bearing? Calculate the time of the sunset and take the bearing then

216) A system of reservoirs and connecting tubes in a gyro compass is called a __________. mercury ballistic

217) At the master gyrocompass, the compass card is attached to the __________. sensitive element

218) Indications of the master gyrocompass are sent to remote repeaters by the __________. transmitter

219) Gyrocompass repeaters reproduce the indications of the master gyrocompass. They are __________. accurate electronic servomechanisms

220) The directive force of a gyrocompass __________. decreases with latitude, being maximum at the geographic equator

221) Where is the gyro compass at its maximum directive force the equator

222) The most ideal in determining compass and or gyro error is during __________.______ When Body is on prime Vertical

223) A gyro-axle is set spinning with its axle horizontal and pointing 045 degrees in Latitude 60 degrees N. Assuming that the rate of change of drift is uniform, find the azimuth of the gyro axle after 15 minutes. 048 degrees 26'

224) It is the direction which the vessel's compass is pointed as the angular distance from 000 degrees at North through 360 degrees clockwise Heading

225) When the gyro-pilot is used for steering, what control is adjusted to compensate for varying sea conditions? Weather adjustment

226) The gyrocompass error resulting from your vessel's movement in OTHER than an east-west direction is called __________. speed error

227) The difference in degrees between true north and magnetic north is called __________. variation

228) Isogonic lines are lines on a chart indicating __________. points of equal variation

229) By convention, the north pole of a magnet is painted __________. red

230) By convention, the south seeking ends of a compass' magnets are colored __________. blue

231) How is the annual rate of change for magnetic variation shown on a pilot chart? Gray lines on the uppermost inset chart

232) If a magnetic compass is not affected by any magnetic field other than the Earth's, which statement is TRUE? Compass error and variation are equal.

233) Magnets in the binnacles of magnetic compasses are used to reduce the effect of __________. deviation

234) The Flinders bar on a magnetic compass compensates for the __________. induced magnetism in vertical soft iron

235) The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is __________. deviation

236) The quadrantal spheres are used to __________. remove deviation on the intercardinal headings

237) The standard magnetic compass heading differs from the true heading by __________. compass error

238) What is the basic principle of the magnetic compass? Magnetic materials of the same polarity repel each other and those of opposite polarity attract.

239) Which compensates for induced magnetism in the horizontal soft iron of a vessel? Iron spheres mounted on the binnacle

240) 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°. You should now adjust the compass until it reads __________. 358°

241) 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 266°. You should now adjust the compass until it reads __________. 268°

242) The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is __________. nonmagnetic

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

244) When a magnetic compass is not in use for a prolonged period of time it should __________. be shielded from direct sunlight

245) Which magnetic compass corrector(s) CANNOT be set on a heading of magnetic east or magnetic west? Heeling magnet

246) Which statement about the Flinders bar of the magnetic compass is CORRECT? It compensates for the error caused by the vertical component of the Earth's magnetic field.

247) The direction in which the compass needle does not point to the true north, but lines itself with the direction of the earth's field at the place , is called. magnetic meridian

248) The direction in which the compass needle does NOT point to the true north, but lines itself with the direction of the earth's field at the place, is called __________. magnetic meridian

249) According to present theory, the magnetic field around a current carrying a wire and the magnetism of a permanent magnet are created by moving electrical charges

250) At what point in a bar magnet is the attraction greatest? at and near its end