any more debris. and we know that there are at least 13 ships. plus the nuclear submarine as well that are in the search zone engaged in surface searches and subsurface searches as well. a bit of a tongue twister, that. but yes, so a very intensive search. and it seems to be intensifying as this kind of time pressure increases, because we have spoken such a lot about the battery life on those pingers, on the black box flight recorder and the cockpit voice recorder. time is rung out. but there is still a window of opportunity for them to get some kind of handle on where this airliner might be, don. >> all right. thank you very much, matthew chance. appreciate that let's go now to our panel this hour. cnn aviation correspondent richard quest, cnn analyst michael kay. collin keller, an integral player in the search for air france 447. and geoffrey thomas, managing