CNN CNN Special Report March 31, 2014 02:30:00
We certainly have our challenges in front of us. what we're trying to find is an acoustic emission from one of the pingers on the flight data recorder or the cockpit voice recorder. typically, these last -- the batteries last for 30 days. usually they last a little bit longer, and that's what we're trying to find. but what is critical is that the teams that are out there searching for the surface debris, they get good position data on that, and they feed it back to the oceanographers to help us determine a probable point of impact for where the aircraft went in. >> you heard captain matthews t...