Originally Posted by
birdspeed
ATC Watcher, before the introduction of GPS, aircraft would quite often be a few miles off track. No one minded then. Airways were 10nm wide. Now with GPS,RVSM we have increased the chances of a midair by a large factor. We must act now before we have another midair/wake upset. ATC must adapt to random offsets.
And then airlines would then have to adapt to increased delays and loss of capacity. All current tools in development and planned airspace changes are predicated on knowing exactly where the aircraft are routing