单项选择题

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

A.A.Course
B.Gyro
C.Variation
D.Maximum
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单项选择题
A.B.C.D.
A.
B.
C.
D.