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
Variation is the angular measurement between（）.
Which statement about the gyrocompass is FALSE（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
Which magnetic compass corrector（s）CANNOT be set on a heading of magnetic east or magnetic west（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
The most accurate method of determining gyrocompass error while underway is by（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
By convention，the north seeking ends of a compass’ magnets are colored（）.