The ELT, why is the ELT not bleeping? That's my question/concern if the a/c is in tact and in relatively shallow waters.
The ELT is probably actuated but the water attenuates the signal. Also from crash experience with light aircraft crashes the ELT antennas often get damaged. Remember the ELT uses 406mhz
This article explains the problem of attenuation underwater very well.
http://users.tpg.com.au/ldbutler/Und...munication.pdf
Of course this is why the CVR or FDR will have an Underwater locator beacon attached which should make finding the wreckage straight forward. That operates at a low frequency of 37khz .
Also it takes about 60 seconds for the ELT to activate once the switch or Gswitch is activated. So it could have been submerged in that time.
Maybe they should look at making the signal activate instantly on G switch activation.