When steering by sutopilot, how often should …… steering be checked?

题库:船长 类型:最佳选择题 时间:2019-02-14 17:22:46 免费下载:《甲类船长英语考证》Word试卷

When steering by sutopilot, how often should …… steering be checked?
A.…….
B.when time allows
C.At least once a watch
D.No checking is necessary

本题关键词:BE值;