Transcripts for CNN Wolf 20140407 17:57:00

>> a submarine, a manned submarine would not help here. we're using an auv, which can go down do 4400 meters depth to search for the wreckage. >> you're talking about an unmanned drone. that would be a lot better than a submarine. here is a question from utah. could the surface scanner shown on chinese news be a cover for more advanced technology that they don't want others to know about? >> could be. i thought they had to have more than a sound device on a stick but apparently people are saying that is what they have. >> here is another question. does the ping area match the out of gas scenario, when the plane would have run out of gas where they are finding maybe some pings coming from the two black boxes? >> it certainly seems that way. if you take the range of the aircraft, and depending on the altitude that would have been