CNN Wolf April 4, 2014 17:49:00
>> like a drone, or towed along on a sled. we call that a towed array. and we haven't gone to that phase yet, because we haven't had that initial starting point. >> what happens when the batteries for those flight data recorders, the cockpit voice recorder, are dead, and the pingers -- the pinging is no longer going? where do the investigators, the search operation go from there? >> well, you see each day that the search area is shifting around. and that's because data that's being gathered from the aerial process, from the satellite process, and from reinterpreting the handshake data is being...
Source: archive.org