Yea, he's probably violating some FAA rules by flying that high.
Max VFR altitude is 20,000. As long as he's not inside someone's airspace, you can do pretty much whatever you want. Although O2 requirements kick in at 12,500. Above 20,000 you must file IFR.
Thanks for the info. So I guess his flight could be completely legal then.
When I get to the top of Mt. Whitney at 14,496 feet I am truly hypoxic. Can verify. Hiking at 10,000 plus feet is hard.
Class A is 18,000, not VFR.
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