A.Class A EPIRBs
B.Class B EPIRBs
C.L-Band EPIRBs
D.Category I EPIRBs
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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
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
A.Navigational warnings
B.Weather warnings
C.SAR and distress alert information
D.All of the above
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
A.straight overhead
B.at the vessel whose attention you are trying to get
C.into the wind
D.about 60 degrees above the horizon
最新試題
Which action should you take after sending a false distress alert on VHF?（）
Which is a distress signal? （）
When can routine communications be resumed when radio silence has been imposed?（）
What is meant by the term “radio silence”?（）
When should distress flares and rockets be used? （）
When sending a DSC call，the vessel’s（）.
If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.
Distress flares and smoke signals for small passenger vessels（）.
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
Which categories of NAVTEX messages may not be selectively rejected through receiver programming?（）