Originally Posted by AndyB007
I've recently been told that the DSC Distress procedure no longer requires you to wait for a Distress acknowledgement being received, or after about 15 seconds, before transmitting a MAYDAY message by voice.
There has been no change here, you were never required to wait for an acknowledgement.
That said in coastal waters it would be highly unlileky that you did not receive an acknowledgement from the Coast Guard but as S/ranger has said the waiting time is to give people a chance to get to their sets, switch of the alarm, grab a pen, tell the kids to shut up etc.
If your set does not receive an acnkowledgement digiatlly it will contiunue to send out a DSC alert roughly every 4 mins. If a larger commercail (GMDSS compliant) vesssel hears your alert they should acknowledge the second time it is sent. This situation could arise for exampl in the western approaches to the E Channel wher you are out of range of CG but in range of commerciual traffic.
Roughly speaking those who can acknowledge are obver 24m, 12 passenegrs or 300tonnes