Deviation which is maximum on intercardinal compass headings may be removed by the().
A、A.Flinders bar
B、B.transverse magnets
C、C.fore-and-aft magnets
D、D.soft iron spheres on the sides of the compass
A、A.Flinders bar
B、B.transverse magnets
C、C.fore-and-aft magnets
D、D.soft iron spheres on the sides of the compass
A、the
A、the
A、
A、Compass error and variation are equal B、Compass north will be true north C、Variation will equal
A、Compass error and variation are equal B、Compass north will be true north C、Variation will equal
A、A.