单项选择题

The firing of a red star signal may mean（）.

A.This is the best place to land
B.You are seen - assistance will be given as soon as possible
C.Tail block is made fast
D.Slack away

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单项选择题

A.the code flags FR
B.a black ball over a black diamond shape
C.code flag Quebec over a black ball
D.two black diamond shapes in a vertical line

单项选择题

A.not close
B.not closing
C.we didn't close
D.not to be closed

单项选择题

A.shorten the scope of anchor cable
B.increase the scope of anchor cable
C.put over the sea anchor
D.put over a stern anchor