A.Quadrantal spheres
B.Heeling magnets
C.Athwartships magnets
D.Fore-and-aft magnets
您可能感興趣的試卷
你可能感興趣的試題
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
A.the compass heading is in line with the lubber's line
B.there is no lost motion in the gimbal rings
C.no change of heading by compass is observed if you raise and lower the heeling magnet
D.the gimbal rings do not strike the compass frame when they are tilted
最新試題
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
The line which connects the points of zero magnetic dip is（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
When crossing the magnetic equator the（）.
What is the basic principle of the magnetic compass（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
Variation in a compass is caused by（）.
The quadrantal spheres are used to（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.