A thought on the partial ping.
An explanation for this occurs to me. If the last ping was sent at the moment of impact with the water there probably were other electronic devices collapsing and shorting themselves out at the same time, these might have created EMP pulses strong enough to overpower the ping in progress. The EMPs might even have come from batteries being crushed.
If the 777 struck the water forcefully, there would have been an electromagnetic splash as well as a H2O splash.
Last edited by Propduffer; 3rd Apr 2014 at 01:26.