the pingers, the acoustic pingers are long since dead. we re just going to have to do what the nations who are still searching are still doing. which is mapping the floor and looking for anomalies. you have a theory as to why they have not found debris. yes. there are two main theories in the southern ind yand ocean is. one is the aircraft was carrying lit yam ion batteries. they re hot when they burn. that theory goes that the fire burned through the main electronic space in the aircraft, caused all the problems and the crew was fighting smoke in the cockpit and put it on auto pilot and long story short, they all died and the aircraft goes south. the other theory is and this is the one that i think is closest to the results, and that is that
thousands of miles away, where no one could likely have survived. family members were shocked. distraught and angry. there would be no rescues, no debris. now, a last hope remained. find the black boxes before they stop emitting pings. you re not in an ivory tower. you haven t got the luxury of time. you got pingers that may expire. so you ve got to say, this is our best guess now. their best guess is a remote area more than twice the size of california. good morning. these are all the aircraft flying today. the australians take over the search. and soon after the australian ship ocean shield lowers its towed pinger locator into the water, pings are detected. clearly this is a most
is. that s one frequency they re using there. there are available very high quality imaging sonars you would be able to see individual portholes and whatever you want to see but i don t think that s what we re looking at here. richard, does it surprise you? here we are a week and a half since the plane went down. no fuselage or black boxes found in relatively shall doe water. doesn t surprise me. i was looking at paula hancocks report at the ship. you ve only got to look out and see the vastness of the area. the conditions. the conditions, the vastness of the area. they are in the right area. we know that. it is just a matter of with the technology that we re using today, in terms of tracking the aircraft we can discuss whether they should have more or should have different types, but with what they were using, this is the only way they re going to find it. slow and very painfully so. david soucie at least one of the pingers on the black boxes had just gotten new batteries.
the black boxes. what is that? reporter: that s right. we know at least one of the pingers was manufactured by the same company as the pingers on the mh 370. these, of course the beacons for those so-called black boxes, the flight data recorder the crucial equipment that tells you what happened and will give investigators an idea of what happened on that flight. we also know some good news that the back was changed. the second may have been changed for competitor s model. but that shows that they may have the full 30 days those standard 30 days that the pingers will be sending out that signal to show where exactly they are. of course this is good news for searchers, which shows that they still have about 19 or 20 days left to find those black boxes. good news indeed. paul la thank you very much. a lot to make sense of. fortunately, cnn david gallo is
these of course the beacons for the so-called black boxes. the flight data recorder. the crucial equipment that tells tells you what happened. and will give investigators an idea what happened on the flight. we also know some good news. that the batteries had recently been changed on one of the pingers. the second one. manufacturers say may have been changed for a competitor s model. but that that shows that they may have the full 30 days. the standard 30 days. that the pingers will be sending out that signal. to show where exact low they are. now of course this is goods now for searchers which shows that they still have about 19, 20 days left to find the black boxes. good news indeed. paula. thank you. a lot to make sense of. fortunately, david gallows is with us. co-led the search for air france flight 447, david sousi its with us author of malaysian airlines flight 370 why it disappeared. and cnn aviation correspondent, richard gwest.qwest.