but i was hoping to skype in. too many movies, probably. >> i tell you what, go right to what you said i heard you say that on anderson cooper's show last night that when you wept back to your old maps you discovered you were right on top of the wreckage. it doesn't bode well for lay people like me who hear that and think we don't have a chance. >> and i'm sorry to give you the hopeless feeling, but because, you know, on paper these things work, the pingers work, they're the right frequency, the people that design them know what they're talking about. you should be able to hear them a long way away. but in practice if they're in a valley, if there's a mountain, and there's plenty of those at the bottom of the sea, or if there's thermal layers in the ocean, the oceans can play a lot of games with sound. same way you can hide a submarine just beneath the surface -- beneath the thermal layer no matter what the sonars are you can hide the submarine because the oceans do strange things with sound. so it's something you've got to listen for because if it works