@dicks-airbus
* Last two pings came from same location = airframe not moving but operative.
No. No. That's an assumption that has been permeating this thread, but it is only one possible interpretation of what has been said.
The "arcs/corridors" are simply the loci of all possible positions that satisfy the constraints imposed by analysis of the satellite signals. The exact position of a ping on the arc can't be determined, or they could simply search at the last point!
If the last two pings were both from a 40 degree locus (which I think is a leak/speculation, not officially stated anyway) all that that would mean is that the last two pings came from positions on the same 40 degree locus, assuming that the two loci are too far apart to fly between in an hour.
The aircraft being stationary, whether landed, crashed or ditched, is one possible interpretation, but so is that it remained flying, either along the arc for some reason, or on a course which intersected the arc in two places an hour apart, within whatever margin of error is implicit in the analysis. It could have ended its life flying round in circles, for example...
Stating that the airframe was stationary is tempting, but is going beyond what has been announced.