Hermit wrote:mistermack wrote:I thought that with gps they would know exactly where the plane was, when it went down.
Not at all amazing. Assuming that the GPS has some sort of backup power supply to transmit a signal after the plane has broken up, it would be of much smaller wattage than under normal conditions. Also, it would only have a small antenna left after the plane's disintegration. Thirdly, its communication system is designed for air travel, not submarine. That's why we don't usually build radio masts 50 metres below sea level.
None of that affects the facts.
Presumably they would have records of gps signals, leading to the point where the gps stopped sending.
If the plane broke up at altitude, it couldn't glide very far on the way down in a severely damaged condition. So the last gps would presumably be fairly close to where the wreckage is.
They don't appear to have that information, as they are looking both sides of the mainland, in the Gulf of Thailand, and the Malacca Straight
On the news today, they were saying that they have plotted the course on radar, and it APPEARS that the plane changed course, and went back over the mainland to a point in the Malacca Straight.
I find that pretty amazing too, if it happened. You would think that air traffic control would have noticed that, and asked them what was happening.
Edit that. The news just said that it's possible that someone on the plane switched off all the transponders, and turned back on a new course, crossing the mainland at low altitude.
That would answer why the trail ended over the Gulf of Thailand, but there isn't any sign of the plane there.