Can't believe how few cruisers use this facility, available on all new VHF
transceivers. Once you have another boats MMSI number you can call them with two or three button presses. Once acknowledged their radio
could be auto tuned to the channel you chose. If you hook up your GPS
to the set (as you should for safety
reasons alone) you can send your position, request theirs & set up your system so it will automatically respond to a position request without any input from you. All this as well as the all important automatically formatted distress
message - that's what the big red button is for
As a start ensure that your radio is set to DSC watch & auto acknowledge. Hook up your GPS
to VHF set by jumping across what ever else it's feeding. Let your buddies know your MMSI number & get theirs. Have fun!