Does anyone know about this?
I mean for example, if a plane is flying London to Paris, I would be extremely surprised if a 270 degree change of course didn't at the very least trigger authorities to investigate and attempt to contact the plane. At the time it turned it was surely in radar range right?
Basically, how could they possibly not have noticed at the time and therefore alerted someone at the time?!
I find this to be extremely scary in itself.