It refers to altitudes above a certain point where the amount of oxygen is insufficient to sustain human life for an extended time span. This point is generally tagged as 8,000 m (26,000 ft, less than 356 millibars of atmospheric pressure).
People Also Ask
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.
And 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.
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.
If oxygen deficiency continues over a long enough period of time, it can cause unconsciousness, permanent brain damage or even death. So, in order to keep everyone maintained with enough oxygen, the masks fall down and provide a personal flow.
Passengers may not carry their own oxygen (compressed oxygen or liquid oxygen) in checked baggage, in carry-on baggage or on their person. Products such as canned oxygen, recreational oxygen and flavored oxygen are also prohibited.