单项选择题
Which condition represents the appropriate time for setting off distress flares and rockets? （）
A.At one hour intervals
B.At half hour intervals
C.Only when there is a chance of their being seen by rescue vessels
D.Immediately upon abandoning the vessel
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相关考题
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单项选择题
Which condition represents the appropriate time for setting off distress flares and rockets? （）
A.Only when there is a chance of their being seen by rescue vessels
B.At half hour intervals
C.At one hour intervals
D.Immediately upon abandoning the vessel -
单项选择题
Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）
A.Navigational warnings
B.Weather warnings
C.SAR and distress alert information
D.All of the above -
单项选择题
Which action should you take after sending a false distress alert on VHF?（）
A.Send a DSC cancellation message on Ch-70
B.Make a voice announcement to cancel the alert on Ch-16
C.Make a voice announcement to cancel the alert on Ch-13
D.Make a voice announcement to cancel the alert on Ch-22A
