system called adsb, automatic dependent surveillance broadcast. you're giving information that's sending directly from an airplane to a satellite and back down to a ground station that reports it. just similar to a radar situation. so air traffic control constantly knows where you are. and that system is available in the north atlantic. >> what do you mean from company to air traffic control? >> well, adsb is an air traffic control function where acars is more developed as a company-type function. in other words, taking engine data, other parameters at the company and dispatch dat that that the company, the airline, that particular airline wants to disseminate. >> mary, what's the hold-up when it comes to a better tracking system, a better recording system? >> in this case, it's the united states own government. we have had the contract out to build this new system literally