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單項選擇題

The total magnetic effects which cause deviation of a vessel’s compass can be broken down into a series of components which are referred to as（）.

A.divisional parts
B.coefficients
C.fractional parts
D.equations

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單項選擇題

The standard magnetic compass heading differs from the true heading by（）.

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

單項選擇題

The reaction of a gyrocompass to an applied force is known as（）.

A.precession
B.earth rate
C.gyroscopic inertia
D.gravity effect

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