Flying High

Ever wonder how the FAA came up with 91.211 requiring oxygen use above 12,500 feet MSL for more than 30 minutes and any time over 14,000 feet MSL? The answer is geography, not physiology. When these rules were written, oxygen systems were expensive and heavy. General aviation wanted to fly anywhere in the U.S. without oxygen, and you can fly any mountain pass in the 48 contiguous U.S. states in less than 30 minutes between 12,500 feet and 14,000 feet MSL.

bblue

Sunday, February 17, 2019 at 12:00 AM ET

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Key Takeaways:

Current FAA oxygen regulations (91.211) are outdated, based on historical and geographical factors rather than individual physiological needs, despite the availability of inexpensive oxygen devices today.
Pilots should determine their personal oxygen needs using a pulse oximeter, as requirements vary significantly based on individual factors, and liberal oxygen use can enhance safety, reduce fatigue, and improve cognitive function at various altitudes, even in pressurized aircraft.
Effective oxygen use involves understanding proper flow rates (often lower than arbitrary recommendations), using devices like Oxymizer cannulas for efficiency, sourcing inexpensive medical oxygen, and being prepared for emergencies through hypoxia training and awareness of carbon monoxide dangers.