A.north magnetic pole
B.south magnetic pole
C.magnetic prime vertical meridian
D.magnetic equator
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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
A.needles are nearly in line with the meridian
B.vessel is near the magnetic poles
C.variation is near zero
D.vessel is near the magnetic equator
最新試題
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
What is the basic principle of the magnetic compass?（）
What is an advantage of the magnetic compass aboard vessels?（）
Variation is a compass error that you（）.
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（）.
Which statement about the Flinders bar of the magnetic compass is CORRECT（）.
What is the basic principle of the magnetic compass（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
When relieving the helm，the new helmsman should know the（）.