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
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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
A.Immediately upon abandoning the vessel
B.Only when there is a chance of their being seen by a rescue vessel
C.At one hour intervals
D.At half hour intervals
A.position will automatically be sent
B.position will only be sent if the vessel is making a distress call
C.MMSI will indicate its ocean region
D.None of the above
最新試題
When should distress flares and rockets be used? （）
Which condition represents the appropriate time for setting off distress flares and rockets? （）
When can routine communications be resumed when radio silence has been imposed?（）
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
What is the calling and distress frequency on a single side band (SSB) marine radiotelephone?（）
What is the fundamental purpose for imposing radio silence? （）
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 recognized as a distress signal?（）
Distress flares and smoke signals for small passenger vessels（）.
Three short blasts of the whistle means（）.