A.east
B.west
C.north
D.south
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A.The readings are too low (small numerically) and the amount of the error must be added to the compass to obtain true
B.The readings are too low and the amount of the error must be subtracted from the compass to obtain true
C.The readings are too high (large numerically) and the amount of the error must be added to the compass to obtain true
D.The readings are too high and the amount of the error must be subtracted from the compass to obtain true
A.the deviation has been offset by the variation
B.there is something wrong with the compass
C.the compass is being influenced by nearby metals
D.there is no deviation on that heading
A.Compass error and variation are equal
B.Compass north will be true north
C.Variation will equal deviation
D.There will be no compass error
最新試題
What is the basic principle of the magnetic compass?（）
While in drydock your vessel will be belt-gauged.This process involves（）.
What is the basic principle of the magnetic compass（）.
Any piece of metal on becoming magnetized will develop regions of concentrated magnetism called（）.
What is the name of the movable，radial guide line used to measure direction on a radar?（）
The magnetism in the various structures of a ship changing as a result of cruising，vibration，or aging is termed（）.
What are the only magnetic compass correctors that correct for both permanent and induced effects of magnetism?（）
Which statement about the gyrocompass is FALSE（）.
Variation in a compass is caused by（）.
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.