A.always shows true north direction
B.indicates the vessel's heading
C.is always parallel to the vessel's transom
D.is located on the compass card
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A.deviation
B.variation
C.compass error
D.dip
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
最新試題
The most accurate method of determining gyrocompass error while underway is by（）.
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（）.
A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°.Which action should be taken to remove this error during compass adjustment（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
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 the basic principle of the magnetic compass（）.
When changing from a compass course to a true course you should apply（）.
When crossing the magnetic equator the（）.