A.Compass error is negligible at or near the earth's magnetic poles
B.It does not have to be checked as often
C.It is reliable due to it's essential simplicity
D.All points on the compass rose are readily visible
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A.Quadrantal spheres
B.Heeling magnets
C.Athwartships magnets
D.Fore-and-aft magnets
A.compass north and magnetic north
B.compass north and true north
C.magnetic meridian and the geographic meridian
D.your vessel's heading and the magnetic meridian
A.can correct by adjusting the compass card
B.can correct by adjusting the compensating magnets
C.can correct by changing the vessel's heading
D.cannot correct
A.worn gears in the compass housing
B.magnetism from the earth's magnetic field
C.magnetism within the vessel
D.lack of oil in the compass bearings
A.deviation
B.variation
C.compass error
D.northerly error
最新試題
Variation is the angular measurement between（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
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（）.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
The quadrantal spheres are used to（）.
What is an advantage of the magnetic compass aboard vessels?（）
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
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（）.