Now it looks like the yanks are drip feeding some "sensitive" data into the mix from some of their satellites. It must be difficult hiding where the source of information comes from and the fidelity it has to offer!
Some very sophisticated search a/c are now scouring North / NW of Australia as a consequence.
You can bet your bottom dollar that the US have a recording of the last few track miles this a/c took before falling off radar.