1) Given that Inmarsat have produced a 'best fit' route for the aircraft, is this available to us? (It is a given that it will no doubt be a 'wide corridor' and not a precise track)
Not the Inmarsat version of course (no detail has been released), but I can derive the numbers from my model.
2) If so, can it be established what the approximate true and magnetic tracks were throughout the supposed southern flight? What is the projected path of a continued track as flown, ie is it possible to have guess at any waypoint that may have been active or be more certain that a fixed magnetic heading was in effect?
Others will have to speak about waypoints. Here is the data for the track from my model to the Inmarsat hotspot. As I said earlier, the track to the Inmarsat hot-spot is the best fit course from my modelling using all 4 BFO values, and a maximum speed of 500kt for the first leg as a limitation. If the allowed maximum speed on the first leg is higher, there are tracks to the South that fit better.
Interestingly, that model track has a quite smooth change of true heading of 14degrees per hour. Not all the tracks in the model set have that property.
The track data
https://www.dropbox.com/s/6jdz1srdc0...t_hot-spot.xls
and the track itself.
https://www.dropbox.com/s/8cfreiw89e...t_hot-spot.jpg