3 OXYGEN ALTITUDES

When are pilots and crew members required to use oxygen masks during flight? What about passengers?


Here's what you need to know.


OXYGEN REQUIREMENT ALTITUDES

There are 3 different altitude rules associated with the use of oxygen masks. Below are the different altitudes and rules associated with that altitude.


12,500' Mean Sea Level (MSL)

Pilots are required to use oxygen masks when flying above 12,500' MSL for over 30 minutes. This means, if a pilot were flying at 13,000' for 45 minutes, he or she would need to use oxygen for the final 15 minutes of flight at that altitude. Anything less than 30 minutes would not warrant the use of an oxygen mask.


Remember, this is an "above" altitude rule. In other words, if the pilot were flying AT 12,500' he or she would not need to use an oxygen mask.


14,000' Mean Sea Level (MSL)

Pilots are required to use oxygen masks when flying above 14,000' MSL for the entire flight duration above that altitude.


Remember, this is an "above" altitude rule. In other words, if the pilot were flying AT 14,000' he or she would need to follow the 12,500' rules.


15,000' Mean Sea Level (MSL)

When flying above 15,000' MSL pilot must use supplemental oxygen (since they are above 14,000') and it also must be supplied to any passengers on board the aircraft. The passengers do not need to use the oxygen, but it must be supplied to them.


Remember, this is an "above" altitude rule. In other words, if the pilot were flying AT 15,000' he or she would need to follow the 14,000' rules.


Author - Nate Hodell

CFI/CFII/MEI/ATP - Creator of wifiCFI - Owner of Axiom Aviation Flight School.


This information is included in the High Altitude Operations Lessons on wifiCFI. Sign up today to watch videos, listen to podcasts, take lesson quizzes, join live webinars, print lesson quicktakes, and more by clicking this link >


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