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?（）
Distress flares and smoke signals for small passenger vessels（）.
If your vessel is underway in fog and you hear one prolonged and three short blasts，this indicates a（）.
Which signal is recognized as a distress signal?（）
When can routine communications be resumed when radio silence has been imposed?（）
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?（）
Which signal is detected as originating from a SART?（）
Three short blasts of the whistle means（）.
The service life of distress signals must be not more than（）.
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）