so i think angus houston is right on when he says we want to go back out and listen some more before we put all kinds of stuff in the ocean which would make it impossible to listen. maybe those batteries can hang on for just another day or two. but again, remind us, i keep going back to airfrance flight 447, because we know they never had the pings, right? this was two years later. they had the debris a couple days out. it was two years after that plane went down that they found some of the wreckage, some days later. they found the black boxes because of science improving. and looking at more of the data over those two years. and finally, sending the submersibles down. but remind us how they found the wreckage, once again? well, because airfrance had those, what they call system status update messaging. what the plane did itself, it was wonderful, within hours of the plane going down, we had these printouts from the plane, and the plane itself told airfrance, told back at their bas