A.danger，stay away
B.all is clear，it is safe to pass
C.all is clear，it is safe to approach
D.a distress signal
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A.consists of 5 or more short blasts of the fog signal apparatus
B.consists of the raising and lowering of a large white flag
C.may be used individually or in conjunction with other distress signals
D.is used to indicate doubt about another vessel's intentions
A.consists of 5 or more short blasts of the fog signal apparatus
B.consists of the raising and lowering of a large white flag
C.may be used separately or with other distress signals
D.is used to indicate doubt about another vessel's intentions
A.Abandon vessel
B.Adrift
C.Beach to
D.Assembly station
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
What is the fundamental purpose for imposing radio silence? （）
The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.
Distress flares and smoke signals for small passenger vessels（）.
Three short blasts of the whistle means（）.
If you log a distress message，it must include the（）.
If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.
When should distress flares and rockets be used? （）
What is the calling and distress frequency on a single side band (SSB) marine radiotelephone?（）
The service life of distress signals must be not more than（）.
Which condition represents the appropriate time for setting off distress flares and rockets? （）