Magnetic heading differs from compass heading by().
A、compass error
B、true heading
C、variation
D、deviation
A、compass error
B、true heading
C、variation
D、deviation
A、Heeling magnet B、Flinders bar C、Fore-and-aft magnets D、All of the above can be set on magnetic east or magnetic west headings
A、geographic pole and the magnetic pole B、lubber's line and true north C、horizontal and the magnetic line of force D、compass heading and the magnetic heading
A、A.compass north and magnetic north B、B.compass north and true north C、C.magnetic meridian and the geographic meridian D、D.your vessel's heading and the magnetic meridian