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Cases, in the united states, for example, lots of fees on your ticket for them to make money. they could argue that it's so rare for a plane to fall out of the sky and need this kind of technology why add the cost? you have a better chance of winning the lottery then falling out of the sky in an airplane. >> well i don't think that any airline will cut back on safety. i think that's a key issue to them. it's a matter of is it possible to do it. there's so many airlines out there in the world have that have installed technology that's able to track them but it requires significant investment on...

Just about 40 minutes after this plane took off. what that last signal was specifically and what it tells us? >> right. and there's a little bit of a, a little bit of a mystery about some of the signals. now the initial information said that first the radar data went down which is really nothing more than coordinates. the radar shows you where you are and it is primary radar, it's literally just a blip on the screen and if you have a secondary, then you have altitude and other information. and then the next thing was the radio communication ceased and then finally it was what's called the adsb...

On the water and also from the air. joining me to talk about all of this, again, let me bring in forensic audio expert, paul ginsberg, president of pro audio labs. les abend, flies a 777, also a contributing editor of "flying" magazine. les, this is a question we ask time and time again after mh-370 disappeared. and that is, realtime streaming data, why is it that we still do not have realtime streaming date to so that someone on the ground can no at all times exactly what's going in the cockpit, exactly what is happening? >> well, it's a matter of cost. now, we do have some aspect of streamin...

Contact. as mary said in an emergency situation you may not have time to make a distress call. however if that airplane continued the fly for 30 minutes. if there was communication with adsb that would have been able to be used as a distress signal itself. so i'm not sure that there's something else other than simply a catastrophic failure of some kind. >> in airbus 330, it too was flying in bad weather, whether it fell out of the sky? >> that's right, and on that one, of course we did have the information from the plane, the plane had the plane reporting system where the plane sends out messa...

Lot going on in the cockpit, he's responding to whatever has happened as far as the diversion goes that's normal there's no reason to call a distress signal. what concerns me most we have reports that the adsb continued to transmit continued to reach out and send information during that time. if it was only a few minutes, i could see why the pilots wouldn't have had time to communicate. in this case if the aircraft continued to fly for almost 30 minutes, at that time you would have expected that if the pilots were able to communicate, they certainly would have made a distress call. >> richard ...