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 can routine communications be resumed on a frequency or channel on which radio silence has been imposed? （）
Distress signals may be（）.
Which condition represents the appropriate time for setting off distress flares and rockets? （）
What is meant by the term “radio silence”?（）
Three short blasts of the whistle means（）.
Wat is NOT required in the radiotelephone log?（）
The signal to guide vessels in distress，which indicates，“This is the best place to land” is the（）.
Which of the following statements about transmitting distress messages by radiotelephone is INCORRECT?（）
When a vessel signals her distress by means of a gun or other explosive signal，the firing should be at intervals of approximately（）.
The distress message of a ship should include considerable information which might facilitate the rescue. This information should（）.