單項選擇題

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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單項選擇題

When relieving the helm，the new helmsman should know the（）.

A.Course per magnetic steering compass
B.Gyro error
C.Variation
D.Maximum rudder angle previously used

單項選擇題

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

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Which compensates for errors introduced when the vessel heels over（）.

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When relieving the helm，the new helmsman should know the（）.

When crossing the magnetic equator the（）.

When relieving the helm，the new helmsman should know the（）.