It was the suggestion of grizzled that one coincidence working against the crew may be that LHS and relief could have been exchanging seats, or RHS and relief,
The litany of holy cheese must be left open, unless the CVR is true to its recording missions.
Of far less chance is that all three pilots were sufficiently engaged in exchanging posts that...........extremely unlikely.
takata
I take your point re: controlled flight. Is it not possible that the absolute value of vertical and horizontal may not be known, and that more importantly, the ratio of these two velocities could be 2:1, to include flying speed?? Forensically, the lack of damage due forward acceleration is hidden (prevented) by a superior vertical number, yes?