rob mccollum, thanks. captain van gurley and mary schiavo. thanks so much. we'll talk later on in this hour as well. >>> all right, so much more to this very challenging search in the southern indian ocean. we'll explore that, next. at your ford dealer think? they think about tires. and what they've been through lately. polar vortexes, road construction, and gaping potholes. so with all that behind you, you might want to make sure you're safe and in control. ford technicians are ready to find the right tires for your vehicle. get up to $120 in mail-in rebates on four select tires when you use the ford service credit card at the big tire event. see what the ford experts think about your tires. at your ford dealer. >>> the search field for malaysia airlines flight 370 has been 2345ir7 ohh been narrowed over the past few weeks. there's a massive challenge. here now is ed lavandera. >> reporter: prulunging into th association a mysterious abyss. a journey few humans can comprehend. the boeing 777 is about 200 feet white, 242 feet long and possibly so deep under

to discuss, anish patel, president of pinger manufacturer duquesne seacom, miles o'brien, and rob mccollumou. rob, to you first, how confident are you that this signal is, indeed, an indicator of one of the black boxes? >> well, it's intriguing. you know, we don't have a lot of information as yet because the information we do have is not being confirmed, but if we take it at face value, it's a very positive sign and it could be the jackpot. >> and miles, there is a lot of ship traffic in the southern portion of the indian ocean, so could this signal be coming from something else? >> i'm not an expert on underwater searching on all this, but i do know that the type of signal that they are reporting would lead you to believe that it is, in fact, the pinger for one of the black boxes. what's interesting to me is how they got to this location, what sorts of assets did the chinese use to get to this location they may not be sharing with everybody. i doubt this was just a lucky shot in the dark. >> and the why, of course, because no one is clear on why they would be in that particular vicinity w

let's bring in rob mccollum and david soucie, why planes crash, and anthony roman, founder and ceo of you. potentially in the right haystack in finding the needle. how big is the haystack? >> well, as you heard, at the moment, it's around 560 square miles. but that could reduce quite quickly if we get another ping or two. every time we establish another contact with the pinger, that helps to reduce the area right down. and the smaller, the better. once we start deploying the bluefin, then you know it's a slow process indeed. >> david, how confident are you that these are pings from the plane? i mean, battery life seems to have held out somewhat miraculously given what you told us about the technology. fairly confident we're on the right track here? >> i'm very confident we're on the right track, simply put, there are other items out in the ocean that use this frequency, the commercial fishing equipment, that sort of thing. but it's important to point out none of them, that i'm aware of, that anybody i've talked to has told ming occur at one-second interval. that's very distinctive and