The quadrantal spheres are used to（）.
- Aremove deviation on the intercardinal headings
- Bremove deviation on the cardinal compass headings
- Cremove heeling error
- Dcompensate for induced magnetism in vertical soft iro
问题
The quadrantal spheres are used to（）.
参考解析：
分类：磁罗经与陀螺罗经的使用题库
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