Investigation Into Hold-ups on the approach.
Basically for a university assignment we have to perform a presentation, I have teamed up with some buddies and our given topic was
"Investigate the Causes and effects of aircraft being held up for long periods during the approach to major airports."
We already have a few topics covered such as the PNB system, but if anyone with relevent experience could give us a bit of guidance or information, we would be very grateful!
Many thanks
The Team!