A.vessel's geographic position
B.vessel's heading
C.earth's magnetic field
D.influence of the magnetic materials of the vessel
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A.true meridian and the axis of the compass card
B.true meridian and the magnetic meridian
C.magnetic meridian and the axis of the compass card
D.axis of the compass card and the degaussing meridian
A.making a structural change to the vessel
B.a short circuit near the compass
C.belt buckles
D.All of the above
A.accurate only in the Polar regions
B.accurate electronic servomechanisms
C.hand operated
D.accurate only if the vessel is underway
A.Magnetic compass table
B.Magnetic meridians
C.Isogonic lines
D.Variation is not indicated on small-scale nautical charts
A.radar
B.DF
C.Satellite Navigator
D.Automatic Omega Navigator
A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
A.the deviation has been offset by the variation
B.there is something wrong with the compass
C.the compass is being influenced by nearby metals
D.there is no deviation on that heading
A.The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true
B.The readings are too low and the amount of the error must be subtracted from the compass to obtain true
C.The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true
D.The readings are too high and the amount of the error must be subtracted from the compass to obtain true
A.compass error
B.true heading
C.variation
D.deviation
A.trouble
B.error
C.wrong
D.mistake
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最新试题
AREAS WHICH CANNOT BE SCANNED BY THE RADAR OF THE VESSEL BECAUSE THEY ARE SHIELDED BY PARTS OF ITS SUPERSTRUCTURE,MASTS,ETC means().
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The transmission time duration of a single pulse of radio-frequency energy is a function of the().
A barometer showing falling pressure indicates the approach of a().
What will NOT induce errors into a doppler sonar log?()
A radar display which is oriented,so that north is always at the top of the screen,is called a(n)().
A radar range to a small,charted object such as a light will provide a line of position in which form?().
An ECDIS is required to display which information?()
Compass deviation is caused by().
A tall object with a light on or near the shore,to act as a guide or warning to mariners is called().