A.Abandon vessel
B.Adrift
C.Beach to
D.Assembly station
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A.displaying a large red flag
B.displaying three black balls in a vertical line
C.sounding four or more short rapid blasts on the whistle
D.continuously sounding the fog whistle
最新試題
Which condition represents the appropriate time for setting off distress flares and rockets? （）
When should distress flares and rockets be used? （）
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
Upon receipt of a distress message，a merchant vessel is bound to proceed to the scene of the distress. Under which of the following cases would this NOT be true?（）
When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.
If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.
When can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
The service life of distress signals must be not more than（）.
Which condition represents the appropriate time for setting off distress flares and rockets? （）
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）