What is a key characteristic of aviation oxygen?

A key characteristic of aviation oxygen is that it is stored under pressure. In aviation applications, oxygen is typically stored in pressurized cylinders to allow for efficient storage and transportation. This ensures that a sufficient supply of oxygen can be delivered rapidly when needed, especially at high altitudes where the ambient air pressure is significantly lower, and oxygen is less available for breathing.

While it is true that oxygen can exist in a gaseous state, in aviation, it is primarily compressed and held under pressure in cylinders for practical use. Oxygen is not usually mixed with air for aviation purposes; rather, it is administered as a pure gas to pilots and passengers who may require supplemental oxygen. Additionally, oxygen for flying is available without a prescription, although certain medical requirements may exist depending on individual health circumstances.