A.being moored for a long time on one heading
B.being struck by lighting
C.steaming from the north magnetic hemisphere to the south magnetic hemisphere
D.loading a homogenous magnetic cargo such as steel plate，iron bars，etc
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A.nonmagnetic
B.weatherproof
C.corrosion resistant
D.capable of being permanently affixed to the vessel
A.like magnetic poles attract
B.unlike magnetic poles repel
C.unlike poles attract
D.the poles of the compass line up with the geographic poles of the earth
A.north magnetic pole
B.south magnetic pole
C.magnetic prime vertical meridian
D.magnetic equator
A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle
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
最新試題
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
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（）.
Which statement about the gyrocompass is FALSE（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
The most accurate method of determining gyrocompass error while underway is by（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.
What is the basic principle of the magnetic compass（）.