Page 28 - Acars System News Today : Breaking News, Live Updates & Top Stories | Vimarsana

Sea for many years looked tat stars to figure out where they are. this is reversing the process in a sense and using a star in this case a stationary satellite, a geostationary satellite, meaning it's always above the exact same spot on earth. this satellite, through the acars system, reaches down to earth and sends a signal. we light this up for a moment, and it does an electronic hand shake with the airplane on the ground. it sends a signal, the airplane answers with a signal, then everything is green and the satellite can communicate with the plane. an hour later, it does the same thing. th...

>> take care. we'll be in touch again. the mystery behind malaysian airlines 370 is triggering questions about the plane's technology. investigators say some communications systems were active several hours after the flight lost contact with air-traffic controller air-traffic controllers. they're looking at this technology for clues about the location. joining us is brian if you think, technology reporter at "the washington post." brian, thanks for joining us. you put out a great article that answered a bunch of questions. we'll go after some of that. after the transponders were disabled how...

Which is a company that disperses the information. but that information then goes to rolls royce, it goes to boeing, it goes to the manufacturer from there. so to me the pings are very viable. it's what should be happening. what's confusing to me, two things that are confusing to me about that is that those pings that are coming off of there, why then is there not a transponder still on? that was turned off. that's the only explanation i would have. because if the electrical system failed to the extent where there's no communication, there's no satcom, no uhf, vhf, way for that pilot to commun...

Were pings coming from that location. now assuming that, i find it extremely difficult to think that somehow the system failed, that 777 is the most reliable aircraft in the air in my opinion. and to think that that whole system, the three buses that we have, the three generators, the backup generator which can be driven by air, that can power those avionics and those communication channels as well. so i believe that it was taken off by intent, that that aircraft was intentfully disabled from communication and that it has been flying. it makes sense to me that the pings are still occurring for...

Aviation security expert. what's your assessment of these various theories? because it seems to be getting more confusing by the hour. >> well, based on the information that's been running around and we have to look at it with a very jaundiced eye, it clearly indicates a purposeful act, something turned the transponder off, somebody attempted to disable the acars system, we know the airplane turned off course. we have reports of signals being emitted from the airplane in a different course than what was originally set for the flight. all of that indicates somebody did that. not the airplane. i...