Wonderful thread, I haven't got any work done for a couple of hours!
Back when the RAF was painted blue, not wearing it, I was flogging around in a Wessex, and listened to a very practised voice from a 700S Sea King advising
"Pan Pan Pan, total electrics failure, position is, etc. etc., closing down radios"
Squeaky voice came back "Station calling Culdrose, say again all after 'Pan' "
Then there was the Wessex that ditched and managed to get out a Mayday. Unfortunately the Jenny listening fainted, so it was a half hour or so before anyone noticed they were overdue