问题
单项选择题
When steering by autopilot,how often should the steering be checked?（）
A.12 times on each watch
B.When time allows
C.At least once a watch
D.No checking is necessary
答案
参考答案：C
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When steering by autopilot,how often should the steering be checked?（）
A.12 times on each watch
B.When time allows
C.At least once a watch
D.No checking is necessary
参考答案：C