A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error
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A.needles are nearly in line with the meridian
B.vessel is near the magnetic poles
C.variation is near zero
D.vessel is near the magnetic equator
A.induced magnetism in vertical soft iron
B.induced magnetism in horizontal soft iron
C.permanent magnetism in ship's steel
D.vessel's inclination from the vertical
A.variation
B.deviation
C.compass error
D.bearing error
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
A.variation
B.deviation
C.compass error
D.drift
最新試題
When a magnetic compass is not in use for a prolonged period of time it should（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
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（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
What is the basic principle of the magnetic compass（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
Which statement about the gyrocompass is FALSE（）.
The Flinders bar on a magnetic compass compensates for the（）.
When changing from a compass course to a true course you should apply（）.