What is the primary use of gaseous oxygen in the aircraft?

The primary use of gaseous oxygen in aircraft is to ensure the safety and well-being of passengers and crew during emergencies, particularly in situations where cabin pressure may be compromised. In these instances, the gaseous oxygen is provided through oxygen masks that deploy automatically or manually, allowing both passengers and crew to breathe in high-altitude, low-pressure conditions.

While the flight crew may utilize oxygen for necessary activities during high-altitude operation or emergencies, the most critical function of gaseous oxygen is to support adequate oxygen delivery when the aircraft is flying at altitudes where the atmospheric air is insufficient for normal breathing. This capability makes gaseous oxygen essential for maintaining safety rather than serving as a casual or supplemental use.

In contrast, cabin pressure management is a separate system focused on maintaining a comfortable atmospheric pressure within the cabin, while inflight firefighting systems and passenger entertainment systems do not utilize gaseous oxygen as a primary function. This distinction underscores the crucial role of oxygen systems in emergency protocols and overall flight safety.