Sources: CNN, Telegraph
quote: GPS, transponder, and ACARS should all be on a redundant, battery backed up, closed circuit. It should be deep in the tail of the aircraft and only accessible through an external panel.
quote: ...I realize that radar coverage over the ocean is limited...
quote: That suggests whoever was flying on the plane was a professional pilot, and likely one who had flown in the region
quote: On Friday CNN reported that a classified analysis by the U.S. military intelligence, Malaysian government, and other cooperating nations indicated that the plane's ACAR system stopped responding to pings around five hours after taking it off.
quote: Pretty sure it stands for Conservative News Network there bud.