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單項選擇題

You are using a radar in which your own ship is shown at the center，and the heading flash always points to 0°. If bearings are measured in relation to the flash，what type of bearings are produced?（）.

A.Relative
B.TRUE
C.Compass
D.Magnetic

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單項選擇題
Compass deviation is caused by（）.
A.magnetism from the earth's magnetic field
B.misalignment of the compass
C.magnetism within the vessel
D.a dirty compass housing
單項選擇題
Compass error is equal to the（）.
A.deviation minus variation
B.variation plus compass course
C.combined variation and deviation
D.difference between true and magnetic heading

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