單項選擇題

The Flinders bar on a magnetic compass compensates for the（）.

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

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單項選擇題

The error in a magnetic compass caused by the vessel’s magnetism is called（）.

A.variation
B.deviation
C.compass error
D.bearing error

單項選擇題

The directive force of a gyrocompass（）.

A.increases with latitude，being maximum at the geographic poles
B.decreases with latitude，being maximum at the geographic equator
C.is greatest when a vessel is near the Earth's magnetic equator
D.remains the same at all latitudes

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The Flinders bar on a magnetic compass compensates for the（）.

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The error in a magnetic compass caused by the vessel’s magnetism is called（）.

The directive force of a gyrocompass（）.

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