emergency procedures to be able to get the passengers to get those on in a safe period of time. >> that's right. yes. the best we have at the moment is it went down very very suddenly. as i say, the pilots couldn't issue a distress call. that takes about five seconds to do. so it just went down very quickly. >> all right. terry. thank you for that and thanks for being with us last night as well with the records of air asia jet will give investigators clues as to what caused the crash. some searchers say they saw an object that formed a shadow under the sea in the shape of an aircraft. so could the plane, in fact still be intact? and what would that mean? former ntsb chairman jim hall joins us with the latest. jim, what does that tell us? >> well, it's -- it could be an indication that the aircraft came straight down and there was no breakup of the aircraft prior to contact with with water. >> okay. when you say that, i mean what do you base that on?