Hunter, Inmarsat puts it on the red arc at 0811. That's not consistent with traveling in a straight line SW over Malaya. Either the SW report over Malaya is wrong, or extra turns were required.
In either case, I'd bet on Inmarsat being right, and the zigzagging over the NE Indian Ocean being a bit suspect.
Now I am more than confused.
The reports are that the left turn brought the aircraft in an SW direction before turning NW after crossing the peninsula. The zigzag was never reported and is contrary to indonesian reports. None of this says anything about the 0811 ping.
My point is that the northern location would be consistant in an catastrophy assumption. But it is not possible in a southern location as someone would have to get the aircraft out of the NW heading.