A.variation
B.deviation
C.compass error
D.drift
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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
A.induced magnetism in the vessel's horizontal soft iron
B.change in the magnetic field when the vessel inclines from vertical
C.permanent magnetism of the vessel
D.magnetic fields caused by electrical currents in the vicinity
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When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
The line which connects the points of zero magnetic dip is（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.