tashed to the cockpit recorder. they want to locate that underwater and so you need to get a debris field first, go to the debris field and then start scanning the water within the vicinity that debris field because it does not emit that far radius around it like emergency locator transmitter. jon: take us through what the u.s. air force and other assets are doing here. we point out, this is 1,500 miles off the coast of perch here. that's a three hour flight just to get out there. then you've got just this large section of ocean searched on the second day. that's many, many hours of flying in and of itself. what are they doing exactly to try to identify these pieces of wreckage if that's what they are? >> well, one of the things they're going to do is they're going to pool resources together so the australian t 3's are