單項(xiàng)選擇題

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

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單項(xiàng)選擇題

When you are firing a pyrotechnic distress signal，it should be aimed at（）.

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

單項(xiàng)選擇題

When should distress flares and rockets be used? （）

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

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Which action should you take after sending a false distress alert on VHF?（）

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When you are firing a pyrotechnic distress signal，it should be aimed at（）.

When should distress flares and rockets be used? （）

When you are firing a pyrotechnic distress signal，it should be aimed at（）.