Comparison data
To check its theory, Inmarsat compared its predictions with six other B777 aircraft flying on the same day in various directions, which resulted in a good match.
The analysis fitted well with the southern corridor, according to the report, and depending on the ground speed of the aircraft, it was then possible to estimate positions at 00:11 UTC – when the last complete handshake took place.
Malaysian government publishes MH370 details from UK AAIB - Inmarsat