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Ocean, that is, if they ever find the black box and if a human being ever has the opportunity to go down and try to retrieve it. don? >> all right. thank you very much, david mattingly for that. i want to bring in jules jaffe. he's a research oceanographer. richard quest is with me as well. jewel jewels, good to talk to you. we just saw david mattingly demonstrate for us what it is like in a sub. granted, this is approximately, the approximation of searching underwater. what did you think of that? in that -- >> i know that it is fascinating television nonetheless but really shows you the chall...

Positive result in these images. >> you mean the side-scan images and sonar. >> yeah. >> that's what we worry about. this is the non intuitive part of it. we know that there is a layer of silt. but what is under that silt is probably not known. we're looking for, as i said a few days ago on your show, the sort of foreground and the background, and, yeah, if there's a boulder there that is sort of the same size as the black box and it's covered with silt, i don't think we will have an easy time telling the difference. so the answer is yes. >> thank you, oh, soothsayer, jules jaffe. we appreciat...

Down. it would be such painstaking work at the bottom of the indian ocean, that is if they ever find the black box and if a human being ever has the opportunity to go down and try to retrieve it. don? >> all right. thank you very much, david mattingly. i want to bring in julesjaffe. richard quest is with me as well. good to talk to you. we just saw david mattingly demonstrate for us what it is like in a sub. granted, this is approximately, the pox mags of searching underwater. what did you think of that? it is fascinating television nonetheless but really shows you the challenges. >> yeah, i m...

That i really can't see any other options. >> so do you think they're searching in the right area, jules? >> well, if they heard the pinger, i mean, the answer is yes. i mean, i spent a bit of time looking into the specifications of the manufacturer of the pinger. and they say well, you can hear us within two miles. and we go to the manufacturer of the towed pinger locater, you realize you're within two miles of that. you have to be within a couple of miles of the pinger to recognize it. is it near the pinger locater? certainly the box is there. i think we're within a couple of miles, the two ...

The north atlantic. thank you for joining us. do you think that investigators are going about the search for flight 370 in the right manner? >> thank you for inviting me, don. first of all, yes, i think so. "titanic" did not have a ping er on it that we could listen and be guaranteed within a few miles of the wreck in order to know where it was. and given the fact this is a standard search procedure that the u.s. navy uses for its military planes and things like that, i really can't see any other options. >> so you think they are searching in the right area, jules? >> if they heard the pinger,...