Originally Posted by
wj9315
I've posted what I see from the ground vs. what the webtrak system shows
Assuming that the straight red track represents an aircraft on the localizer i.e. aligned with the runway heading, it's highly unlikely that you would observe another aircraft following the blue track, unless the pilot has had one too many.
WebTrak certainly has its faults (it sometimes misidentifies flights, or even fails to track them at all), but the tracks for those that it does plot are usually pretty accurate, as one would expect given that it's powered by NATS' radars.