Which one of the followings is incorrect about magnetic compass?______.A.The magentic compass is compulsory on my vesselB.The magentic compass is prone to errorC.The magentic compass is always placed inside steel constructionsD.The magentic compass needs to be calibrated to compensate for local magnetic distortion
Which one of the followings is incorrect about magnetic compass?______.
A.The magentic compass is compulsory on my vessel
B.The magentic compass is prone to error
C.The magentic compass is always placed inside steel constructions
D.The magentic compass needs to be calibrated to compensate for local magnetic distortion
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