Definitively... (As a number of UK TREs have bees in their bonets over this at the moment)...
We already have:
The word "MAYDAY" spoken at the start identifies a distress message, and the words "PAN PAN" spoken at the start identifies an urgency message. The words "MAYDAY or "PAN PAN", as appropriate, should preferably be spoken three times at the start of the initial distress or urgency call.
The initial call from an aircraft in distress is, as the original poster says, the, errr,
initial call, which, errr,
initiates the distress or urgency condition. Subsequent calls
are distress or urgency messages, and thus qualify for the single iteration of MAYDAY or PAN PAN.
Alles Klar, Herr Komissar?
