The published radar information says they think the aircraft turned north (NNW) after crossing the Malay peninsula, but the published satellite data shows the craft going either north or south. If they are so sure it turned north, why also show the southerly possibility.
That almost suggests to me a disoriented crew member realized they had crossed the peninsula, thought he had made a 180 when he only did about 120 turn, assumed he was south of Kuala Lumpur based on the coast below and headed north.
(A more likely scenario for incapacitated crew is that it did not turn, but kept going straight into the Indian ocean)
I’m not suggesting the plan meandered in heading, but rather kept a heading and from what the reports say, changed (meandered?) up and down between 45,000 and 20,000 feet. This might be consistent with a slight upward trim, which would keep the plane heading up until that trim did not work any more when the air was too thin, and it nosed down to pick up speed. Rinse and repeat.
Of course, if it stalled at 45,000 feet and recovered without intervention, it may have come out of the fall pointed in another random direction and continued on that heading, and so on - explaining too the turn after the peninsula crossing - and also suggesting if it kept doing this, it could be basically anywhere.
SO are ALL the satellite transmissions consistent with a straight line course? I’m understanding they had hourly pings but the indicated position forms a circle, not a line (and not, it looks like, a great circle).
I’m not buying the hijack hypothesis because of psychology. This would have taken serious planning, somewhere. Even if the hijackers did nothing or crashed, some organization would be crowing about how they had fooled the world’s superpowers. Plus, the aircraft would have to cross into India and China based on its course, and that border is not unmonitored. Ditto heading for Pakistan or Afghanistan, or over Kashmir. A lot of watching on both sides.
If a crew wanted to commit suicide, there would be wreckage in the area. I can’t imagine a crew in that area thinking they would fly undetected by military radar in a place with a lot of military tensions. Why commit suicide the hard way? Why wait? Push the nose into a steep dive and at a certain point it’s unrecoverable.