hog88
Your ray of sunshine
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- Sep 30, 2008
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Haha yes sorry.
Flight levels in the US start at 18,000ft. When you’re in the flight levels pilots use 29.92 as their altimeter. When altimeter settings are lower than 29.92 then FL180 (18,000ft) becomes unusable for vertical separation with aircraft that are at FL190 (read they’d be closer than 1,000ft due to the mismatch in altimeters).
Additional Tri Cities mentioned class E airspace at 60,000 ft. Technically when you get above that you can be VFR as you’re no longer in class A airspace and are in class E.
That I understand thanks.
My guess is there aren’t many passenger plans that can fly at/above 60,000 feet are there?