The quadrantal spheres are used to（）.<br>A:remove deviation on the intercardinal headings<br>B:remove deviation on the cardinal compass headings<br>C:remove heeling error<br>D:compensate for induced magnetism in vertical soft iron

The quadrantal spheres are used to（）.
A:remove deviation on the intercardinal headings
B:remove deviation on the cardinal compass headings
C:remove heeling error
D:compensate for induced magnetism in vertical soft iron

出自：海船船员证

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