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Sophisticated underwater search kwm will arrive in australia. it will not get used unless they can find the site where 370 went down. chuck nash is a retired navy captain and a fox newsan analyst. they sent out two sophisticated equipment. tpoed to ping locator and blue fin 21. can you break down the devices for me? i understand they serve different purposes. >> yes, the tpl 25 is a device that picks up the a custic signature of the pinger that is located on the flight data recorders. and the pinger is designed to draw attention, that is the black box. to pull up the black box that records all...

Perth. he said this tpl arrived overnight. my next guest has used an earlier version of this tpl 25 back in 1996. she is a retired navy captain and navy diver. bobbie, thank you so much for joining me, because i need your expertise as we're all learning about these mechanisms together here. first, we keep hearing this analogy of a needle in a haystack, and in order to find the needle, you have to figure out where the haystack is. but they don't even definitively have plane debris. so can you even use the tpl without plane debris? >> no, you can't. we have to really pin down where we want to de...

>> that's correct. i still think they're concentrating their efforts in this search grid, and i think they're going to remain there. they're still trying to pick up that debris. but i'm pretty confident they have that in that location. >> so tim, just maybe if you could chime in with what christine has been talking about. and specifically with respect to what's in front of you, the submersible. how is it that factor in? well, i'll have to call it by its name, the tpl-25, tow pinger locater. what's the use of the gear that you have? >> well, that's true. this is kind of for later on. what they'...

The navy commander that we spoke with last night said they do have a ship that's heading to scene that will be carrying the towed pinger locater, the tpl, which will be able to reach or can reach maximum depths of 20,000 feet. the hope would be that the seas are calm and they can deploy this ctow-fish as some call it, into the ocean, and drag it behind the ship, trying to pick up acould you say it particulars. hopefully this particular tow can go to 20,000 feet. this is a very deep ocean. ideally,it not going to be -- the maximum depth is 26,000 feet and we can hopefully have -- that would be ...