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
Variation in a compass is caused by（）.
What is the basic principle of the magnetic compass?（）
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
Variation is a compass error that you（）.
Variation is the angular measurement between（）.
Which compensates for errors introduced when the vessel heels over（）.
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.