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
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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
A.deviation
B.variation
C.compass error
D.dip
A.damping error
B.ballistic deflection
C.quadrantal error
D.speed error
最新試題
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
The line which connects the points of zero magnetic dip is（）.
What is the basic principle of the magnetic compass（）.
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（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）