Plane with 239 people on board crashes in Southern Indian Ocean

[anvi]

What amazes me is that it's been three days and they haven't even found any wreckage yet.  I know the waters out there are deep, but no signs at all? 

[anvi]

From what I'm hearing on the media, 1.) there is no debris in the waters; 2.) the plane may have been changing course abruptly but there was no required radio communication; 3.) the plane dropped off radar abruptly with no transponder info and no other instrument indication; 4.) despite the significant boat traffic in those waters, there are no eyewitness accounts of anything; 5.) since then, multiple countries have been involved in a search effort examining all available evidence and have come up with nothing.  I mean seriously, what the hell??  The plane didn't vaporize, and it wasn't beamed out of the present time by a Star Trek vessel three centuries in the future.  A massive aircraft like this can just suddenly disappear suddenly without a trace?  Unless someone knows something that is not being released to the public, this is, beyond the tragedy involved, very seriously odd.