@DJ77
Taking your first point....
"It (the "log on" and therefore what we believe was MH370) is assumed close to Banda Aceh only due to the existence of the radar track".
Are you saying that IN CONJUNCTION WITH the "last/lost conatct" Primary Radar data is it possible to establish that a plot for the "first arc" is possible ?
As in, it is IMPOSSIBLE to establish a plot for this "start point" using Inmarsat data/BFO/Doppler Effect alone ?