I’ve noticed two red circles over some of the USA, what are those? I think they might be no-fly zones but I’m unsure. (If they are, does that have any significance in IF?)
Those would be Restricted Airspace in Colorado.
See below, thanks Laura. Couldn’t find the link.
This will help. (-:
Ah, okay. Are there specific aircraft (e.g. fighters) which can fly in them?
As Chris said, the airspace is closed up to a ceiling of FL120 to planes bigger than a A321 and a 757 as people were flying into KASE with 748s.
FL starts at 18,000 feet ;)