A.increases with latitude，being maximum at the geographic poles
B.decreases with latitude，being maximum at the geographic equator
C.is greatest when a vessel is near the Earth's magnetic equator
D.remains the same at all latitudes
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A.variation
B.deviation
C.compass error
D.drift
A.compass error
B.variation
C.magnetic dip
D.deviation
A.zero
B.equal to variation
C.eliminated by adjusting the compass
D.constant at any geographical location
A.geographical position
B.speed
C.heading
D.longitude
A.in high latitudes
B.near the equator
C.on north or south headings
D.on intercardinal headings
最新試題
Which statement about the gyrocompass is FALSE（）.
Variation in a compass is caused by（）.
What is an advantage of the magnetic compass aboard vessels?（）
Which compensates for errors introduced when the vessel heels over（）.
Variation is the angular measurement between（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
Variation is a compass error that you（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.