I have a question about the satellite thing.
I have come a bit late into this so apologies if I have this wrong or if it's been answered. From my understanding the co-pilot delivered his last message, stuff got switched off, and then the plane effectively disappeared but was hailed, sort of, by a satellite 7 hours later.
My question is, would the plane have had to be flying for the satellite to have recognised it? Might it have already crashed but whatever machinery/signals the satellite recognises as 'plane' still have been operating?
I seems sort of likely that shortly after his message, the plane just crashed, for whatever reason.