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
Variation is a compass error that you（）.
By convention，the north seeking ends of a compass’ magnets are colored（）.
What is the basic principle of the magnetic compass?（）
When a magnetic compass is not in use for a prolonged period of time it should（）.
While in drydock your vessel will be belt-gauged.This process involves（）.
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval（）.
What is an advantage of the magnetic compass aboard vessels?（）
Which magnetic compass corrector（s）can be set while the vessel is on a heading of magnetic north or magnetic south（）.
In more recent years，（）has been used by civilians in many new ways to determine positions，such as in automobile and boat navigation，hiking，emergency rescue，and precision agriculture and mining.
The variation for most given areas undergoes（）change，the amount of which is also noted on charts.