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
Which statement about the gyrocompass is FALSE（）.
The quadrantal spheres are used to（）.
The Flinders bar on a magnetic compass compensates for the（）.
When a vessel changes course from one cardinal heading to another cardinal heading whilea djusting the compass，which action should be taken?（）
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
When changing from a compass course to a true course you should apply（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The most accurate method of determining gyrocompass error while underway is by（）.
Which compensates for errors introduced when the vessel heels over（）.
Variation is the angular measurement between（）.