单选题The lubber’s line of a magnetic compass（）.Aalways shows true north directionBindicates the vessel's headingCis always parallel to the vessel's transomDis located on the compass card
单选题
The lubber’s line of a magnetic compass（）.
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
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