At what altitude would flight crew have to wear oxygen continuously?
Sea Level to 12,500' - No oxygen required. 12,501' to 14,000' - Required by the required crew if over 30 minutes at this altitude. 14,001' to 15,000' - Required to be provided and used by the required flight crew.
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Importance to MembersAnd that at cabin altitudes above 14,000 feet pilots must use oxygen at all times. And that above 15,000 feet each occupant of the aircraft must be provided supplemental oxygen. All of this is spelled out in Federal Aviation Regulations Part 91.211.
The CFRs require that at the minimum, flight crew be provided with and use supplemental oxygen after 30 minutes of exposure to cabin pressure altitudes between 12,500 and 14,000 feet and immediately on exposure to cabin pressure altitudes above 14,000 feet.
For best protection, you are encouraged to use supplemental oxygen above 10,000 feet MSL. At night, because vision is particularly sensitive to diminished oxygen, a prudent rule is to use supplemental oxygen when flying above 6,000 feet MSL. So, when you fly at high altitudes, supplemental oxygen is the only solution.
When the altitude of an airplane is less than 12,500 feet, there is no supplemental oxygen required for anyone in a private plane. From 12,500 feet to 14,000 feet, supplemental oxygen must be used by the required flight crew for any portion of the flight that is more than 30 minutes.
In aeronautics, hypoxia typically results from a decompression or lack of pressurisation of the aircraft cabin. Hypoxia occurs within a few minutes if the cabin pressure altitude rises to between 5,000-6,000 m (about 16,000 - 20,000 ft).
On average, you will find most commercial airliners flying anywhere from about 31,000 feet to 42,000 feet. That is equivalent to 5.9 to 7.2 miles in the air. Smaller aircraft, whether commercially operated or not, will fly at lower altitudes, often below 15,000 feet.
The only oxygen equipment allowed on an airplane is the portable oxygen concentrator (POC). If you need oxygen in flight, you must take a portable oxygen concentrator with you, and , you must let your airline know ahead of time. They may require a doctor's letter to verify the need for the POC on the plane.
Lower levels of oxygen in your blood may make you feel unwell or could even be harmful to you during or after your flight. This means that, even if you do not usually need oxygen, you may need it while flying. Additional oxygen keeps the oxygen levels in your blood at a comfortable level and keeps you safe.
Values >95% on room air suggest that inflight hypoxemia is unlikely and that further evaluation is likely not necessary. Patients with saturations <92% on room air at rest should receive supplemental oxygen inflight, because they are at high risk of hypoxemia at altitude.