for anyone that's ever gone scubadiving or, you know, been down there in any sort of vehicle, but this is definitely -- if the chinese heard what they think they heard on the same frequency, it has to be a manmade object of some sort. >> i'll not be so definite but most likely it's a manmade sound. we're certainly hopeful it's the locater beacons for the black boxes. >> we do indeed. colleen, let me ask you. when you look at these -- the search for these batteries or these data boxes, are the current -- let's say they're on the bottom of the ocean somewhere. are the currents strong enough to move those boxes from point a to point b, or are they pretty much firmly down on the bottom of the ocean? >> oh, candy.