A.deviation
B.variation
C.compass error
D.dip
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A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error
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
最新試題
When adjusting a magnetic compass for error，a deviation table should be made（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
Variation in a compass is caused by（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
Variation is a compass error that you（）.
When relieving the helm，the new helmsman should know the（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
The quadrantal spheres are used to（）.
The most accurate method of determining gyrocompass error while underway is by（）.