Ahhh websleuths... I knew there would be some discussion to be had here hahaha!
I haven't read through the entire thread... so I have no idea what kind of speculation, theory's and conspiracy's have been put forward as yet
I'm sure there are other pilots on here who can (or already have) added some of the technical scope and detail to fill others in - I would like to add my own thoughts on this - in the one forum where "armchair detective" is acceptable
My background:
I'm a former pilot in the Royal Australian Air Force. Aircraft types flown include everything from bug CT-4 trainers (Bug smashers) through to fast jet types such as the Hawk 127 and F-111G/C.
I recently (Jan/Feb) spent a month flying "Jumpseat" with Malaysian Airlines aboard their 737-800 and 777-200 aircraft - So this incident had a strange feeling of personal attachment.
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My first point of contention is the claim that they have not located the aircraft.
I'm 100% sure they know exactly where it is and they likely knew within minutes of it being confirmed down.
There are MULTIPLE independent and redundant systems that are operating aboard this aircraft type and configuration that are not related in task and essentially perform completely separate tasks, yet for one reason or another, utilize accurate real time location reporting as part of what they do.
Things such as real time maint. reports (that continuously send flight performance data to the aircraft maint. teams throughout the flight) would have included a GPS lat. Long. co-ordinate current to the last event log. If there was a major structural or mechanical failure, this would likely have been reported (even as system after system failed within seconds before complete disintegration in mid air). (Read more about the Air France Airbus A-330-200 crash and the way this system works with google search if you want to know more). This is a Boeing aircraft, and the system on the 777-200 is not as modern and comprehensive as the newer 330-200 airbus system, but its still well within capability of this.
Secondly - Civil Aviation Laws dictate that all civilian flights over open water must carry a emergency locating beacon device ... basically an EPIRB. On a small private aircraft, this would normally have to be activated by a person at the time of emergency, however the ones fitted to *most* large commercial airliners these days are automatically activated when they are triggered by a G-Load sensor (essentially recording a high G-force that is deemed consistent with a crash scenario) and possibly even water activation. I'm not 100% on these systems and what MA uses, but they are definately fitted in one shape or form.
Thirdly - Military Radar. I can tell you right now, the counties in that region are all monitoring that airspace with almost paranoid levels of constant observation. Whilst Indonesia and Vietnam do not have the most capable or moderm radar systems around these days, Singapore does - and you'd be hard pressed flying a kite in that area without one, if not all of them knowing.
We often flew joint exercises with countries in the area (from Singapore) and I'm more than aware of who is watching what and how closely round there
On top of that, there are "unspoken tensions" between countries in this region that I won't detail here - that ensure that with some countries getting their ambitions mixed up with their capabilities, there are always paranoid eyes watching everything and everyone who might dare cross their line of turf.
Then there are the SOSUS listening devices that have been placed all through the SE Asian waters - capable of hearing a boat leave port in Vietnam and identifying it as a village fisherman or a military type vessel.. its incredibly accurate and capable, uses triangulation and other classified methods by which is can locate a sound, vessel or target of interest down to a few meters. The system is constantly monitoring and everything is saved for analysts to review - for a long long period of time in review if required.
This area of the world is particularly "Hot" right now... strategically, things are starting to get a little on the "tense" side with defense budgets of all in the region growing and growing - and a good deal of that being spent by everyone on equipment that accurately monitors all activity of shipping and aircraft movements that cross their territory or even come close to it.