单项选择题
A.north magnetic pole B.south magnetic pole C.magnetic prime vertical meridian D.magnetic equator
The lubber’s line on a magnetic compass indicates（）.A.c...
单项选择题The lubber’s line on a magnetic compass indicates（）.
A.compass north B.the direction of the vessel's head C.magnetic north D.a relative bearing taken with an azimuth circle
The lubber’s line of a magnetic compass（）.A.always show...
单项选择题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
The horizontal angle between the magnetic meridian and ...
单项选择题The horizontal angle between the magnetic meridian and the north-south line of the magnetic compass is（）.
A.deviation B.variation C.compass error D.dip
