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Daddy! you're not just looking for a house. you're looking for a place for your life to happen. welcome back. bill weir in for piers morgan tonight. i want to go back to this timeline as it relates to acars. we got new word that there is confusion. a conflicting report between what the malaysian government was saying yesterday and now what the chief executive of malaysia airlines is saying today. we all now acars, we've kind of learned that this is this system that lets planes communicate with each other or ground stations via radio or satellite. and what we do know is that at 12:41 local ti...

Said. i think you were referring to the acar system, that transmits more health data. but this independent surveillance broadcast is the next generation of how we will track planes. it not only gives air traffic controllers information but also gives the pilots information on other aircraft around them. it being slowly rolled out. it requires ground stations, it's not wild lidely used in th united states and doesn't have full coverage. at this point i think it's clear we're looking for a plane that was being controlled by someone who doesn't want it to be found. if you crash, do something dram...

Them for some reason, the air traffic controller might say i don't see you, can you recycle your transponder, i don't see you. there are other tracking technologies, this adsb system, i believe this plane had that but the ground stations aren't everywhere yet. >> that's my understanding, katie, from talking to a pilot last week, someone who has actually flown this aircraft. the point he made was he called it a data link system and that that system is constantly sending different kinds of information. but it appears from what we know now in the investigation, we do have some information that th...

>> evan, let's go to you. answer my question. is it standard in that part of the world? we don't know. that's something we need to check on. we will read into the reporting that you and pamela brown have. some u.s. officials believe that the plane's westward turn and continued flight discount the battery theory. a fire would have been catastrophic and rendered the plane unable to continue to fly. >> that's right. the mystery is the plane diverts from the course and ends up crossing the peninsula and towards the indian ocean. various things have been picked up from satellite and radar and the p...

Traffic, so air traffic controllers no longer need to know where you are and they don't need any of your information, you're just going to clutter up their screen. you turn them off to declutter their screens and no longer a factor. >> on the ground you don't need it, you switch it off. that's the reason it exists. you also mentioned the shut down of some of the communication equipment. the radios, mitchell, a number of radios, not just one. they're located right here. >> here and we have radios within range of ground stations. when we're flying over the oceans we use high-frequency or hf and ...