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
单项选择题 The Coordinator Surface Search in a SAR situation should display by day（）.
单项选择题 Some sea water came into the wheel house during the voyage due to（）the window thereof.
单项选择题 If your vessel is dragging her anchor in a strong wind，you should（）.
