FAA regulations (14 CFR 91.211) mandate supplemental oxygen for private pilots above 12,500 feet MSL (if over 30 mins), continuously above 14,000 feet MSL, and for all occupants above 15,000 feet MSL, ...
To conduct flights at higher altitudes, an aircraft must either have a pressurized cabin to replicate the pressure at a lower altitude, or its occupants must be given supplemental oxygen. Regardless ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results