length, you have to do it with a towed array. you have to do it with a new vehicle. and you better start lining that up now. >> i assume they've searched a much wider area on the surface with the planes and the ships, right? >> that's proven negative, so they found nothing from doing that. again with looking at a wider area of search, they're assuming that it's in this area, not just on the pings, but also the fact of how much fuel they think that plane consumed based on their guess at altitude, their guess at air speed, you know, so really they're going by the pings in the water and that's the best way now to look. >> because, peter, earlier in the week, we heard malaysian officials, australian officials, including top leaders there, suggesting they're going to wrap up by this weekend presumably the aerial search. you don't think necessarily that's a good idea? >> well, i think you've got to keep searching until you find something. but they've got a lot resources developed on the air side that hasn't panned out. i don't think it's going to pan