The big difficulty with the Inmarsat analysis is that the equipment in the a/c was in a suspect condition. Possibly it had suffered physical damage from an event or it had been switched off. For equipment that isn't designed to stop cleanly on switch off, very odd things can happen as the supply rails fall so instead of some meaningful 'ping' that everyone has been analysing, they might have been analysing a 'chirp' as the volts die. A huge amount of weight seems to be given to this analysis. I'm with the group who feels that case is not proven. The a/c might be anywhere, even landed softly enough to let some or all souls survive. I hope so.