单选题Which compensates for errors introduced when the vessel heels over（）.AThe soft iron spheres on the arms of the binnacleBMagnets placed in trays inside the binnacleCA single vertical magnet beneath the compassDThe Flinders bar
单选题
Which compensates for errors introduced when the vessel heels over（）.
A
The soft iron spheres on the arms of the binnacle
B
Magnets placed in trays inside the binnacle
C
A single vertical magnet beneath the compass
D
The Flinders bar
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