• Fact #1: All Boeing 777 commercial jets are equipped with black box recorders that can survive any on-board explosion
 No explosion from the plane itself can destroy the black box  recorders. They are bomb-proof structures that hold digital recordings  of cockpit conversations as well as detailed flight data and control  surface data.
  
 
• Fact #2: All black box recorders transmit locator signals for at least 30 days after falling into the ocean
 Yet the black box from this particular incident hasn’t been detected  at all. That’s why investigators are having such trouble finding it.  Normally, they only need to “home in” on the black box transmitter  signal. But in this case, the absence of a signal means the black box  itself — an object designed to survive powerful explosions — has either 
vanished, malfunctioned or been obliterated by some powerful force beyond the worst fears of aircraft design engineers.
  
 
• Fact #3: Many parts of destroyed aircraft are naturally bouyant and will float in water
 In past cases of aircraft destroyed over the ocean or crashing into the ocean, 
debris has  always been spotted floating on the surface of the water. That’s  because — as you may recall from the safety briefing you’ve learned to  ignore — “your seat cushion may be used as a flotation device.”
 Yes, seat cushions float. So do many other non-metallic aircraft parts. If 
Flight 370 was  brought down by an explosion of some sort, there would be massive  debris floating on the ocean, and that debris would not be difficult to  spot. The fact that it has not yet been spotted only adds to the mystery  of how Flight 370 appears to have literally vanished from the face of  the Earth.
  
 
• Fact #4: If a missile destroyed Flight 370, the missile would have left a radar signature
 One theory currently circulating on the ‘net is that a missile brought down the airliner, somehow blasting the 
aircraft and all its contents to “smithereens” — which means very tiny pieces of matter that are undetectable as debris.
 The problem with this theory is that there exists no known  ground-to-air or air-to-air missile with such a capability. All known  missiles generate tremendous debris when they explode on target. Both  the missile and the debris produce very large 
radar signatures which would be easily visible to both military vessels and air traffic authorities.
  
 
• Fact #5: The location of the aircraft when it vanished is not a mystery
 Air traffic controllers have full details of almost exactly where the  aircraft was at the moment it vanished. They know the location,  elevation and airspeed — three pieces of information which can readily  be used to estimate the likely location of debris.
 Remember: air safety investigators are not stupid people. They’ve  seen mid-air explosions before, and they know how debris falls. There is  already a substantial data set of airline explosions and crashes from  which investigators can make well-educated guesses about where debris  should be found. And yet, even armed with all this experience and  information, 
they remain totally baffled on what happened to Flight 370.
  
 
• Fact #6: If Flight 370 was hijacked, it would not have vanished from radar
 Hijacking an airplane does not cause it to simply vanish from radar.  Even if transponders are disabled on the aircraft, ground radar can  still readily track the location of the aircraft using so-called  “passive” radar (classic ground-based radar systems that emit a signal  and monitor its reflection).
 Thus, the theory that the flight was hijacked makes no sense  whatsoever. When planes are hijacked, they do not magically vanish from  radar.
 by MIKE ADAMS