A.compass north
B.the direction of the vessel's head
C.magnetic north
D.a relative bearing taken with an azimuth circle
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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
A.induced magnetism in vertical soft iron
B.induced magnetism in horizontal soft iron
C.permanent magnetism in ship's steel
D.vessel's inclination from the vertical
最新試題
The MOST important feature of the material used for making the binnacle of a standard magnetic compass is that it is（）.
Variation in a compass is caused by（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
When changing from a compass course to a true course you should apply（）.
When a magnetic compass is not in use for a prolonged period of time it should（）.
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（）.
Variation is a compass error that you（）.
When adjusting a magnetic compass using the fore-and-aft permanent magnets，you should（）.
What is the basic principle of the magnetic compass?（）
This induced magnetism（）the permanent magnetism already present in the ship.