the investigation. the idea no indication from the acars data, wireless transmission of data from the plane that the plane was preprogrammed. i have clive next to me. you're experienced in these issues. as tom reminded, it wasn't just acars transmission that turned out to be false that gave an indication, it's that the plane flew steady by way points, less likely for you or me if we were experienced pilots to handle than an autopilot. aren't there ways for the pilot without preprogramming, turning the dial, the heading. >> i think this underlines something, this plane does not disappear. what disappeared was our ability to see it. this shows shortcomings in the way of acars. they were dispatched every 30 minutes. between those messages there's this yawning gap. this is a quite considerable change they have come up with again today, which is confusion. in one senseette takes out the sinister implication, something