Smack, the deployment of an Epirp is a Mayday. A DSC emergency call is a Mayday.
CG would not have sent airplanes in a SAR operation if maydays have not been deployed.
The two cases that I had refereed about Maydays been deployed basically because a sailboat had lost the engine had not to do with this rally but were two recent cases, these ones:
I understand that. The Spot SOS was apparently treated as a Mayday as well - which makes sense (though I don't know what actual CG procedure is on Spot calls).
My point is that radio contact would have been established between the CG and the boat(s) if possible. From there a discussion would have occurred as to the nature of the emergency. I just wonder at what point in that discussion the Mayday became a Pan-Pan? No way to know of course - but it would be an interesting transcript.