TT,
Looks like you forgot to take your omnipotent pill and jumped in with both size 12's "before checking the facts...!"
The units mentioned, as you quite rightly said, are airports (they're big things that live outside your big green screen) but as the thread is about ATC, and the CD's lean heavily on ATC chatter, then they are refered to in the terms of NATS Units.
I don't have a link to the related sites as I saw these in the shops (You find them outside as well..!)
Another day, another thread that has not allowed the facts or common sense to to come within 5 miles of it.
...and as a Tower ATCO, I use 2.5nm!
Perhaps I'll change the ending to say:
"Get rid of the chip and relax. It'll help you live longer"
[ 28 November 2001: Message edited by: Muppit ]