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
Which compensates for errors introduced when the vessel heels over（）.
What is used to correct for both induced and permanent magnetism，and consequently must be readjusted with radical changes in latitude（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
What is an advantage of the magnetic compass aboard vessels?（）
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（）.
When crossing the magnetic equator the（）.
A ship under construction or major repair will acquire permanent magnetism due to（）while sitting stationary in the earth’s magnetic field.
When changing from a compass course to a true course you should apply（）.
When adjusting a magnetic compass for error，a deviation table should be made（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.