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 crossing the magnetic equator the（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
When relieving the helm，the new helmsman should know the（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.