When crossing the magnetic equator the（）.<br>A:Flinders bar should be inverted<br>B:Heeling magnet should be inverted<br>C:The quadrantal spheres should be rotated 180°<br>D:Flinders bar should be moved to the opposite side of the binnacle

When crossing the magnetic equator the（）.
A:Flinders bar should be inverted
B:Heeling magnet should be inverted
C:The quadrantal spheres should be rotated 180°
D:Flinders bar should be moved to the opposite side of the binnacle

出自：海船船员证

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