What distinguishes the AUTO position from the DEPLOY position in the oxygen system?

The differentiation between the AUTO position and the DEPLOY position in the oxygen system primarily revolves around the flow rate based on cabin altitude. In the AUTO position, the oxygen system automatically adjusts the flow rate of oxygen depending on the altitude of the cabin, ensuring that passengers receive the appropriate amount of oxygen based on the conditions they are in. This automatic adjustment is crucial for maintaining adequate oxygen levels during varying altitudes, particularly in an emergency situation where the cabin may lose pressure.

On the other hand, the DEPLOY position typically allows for a set flow rate that may not adapt to changes in cabin altitude, meaning it would provide a constant flow of oxygen regardless of the altitude, which could lead to insufficient oxygen supply if the cabin altitude is particularly high. Therefore, the key distinction lies in how the system regulates oxygen flow in relation to cabin altitude, making it vital for effective oxygen management and passenger safety in an aircraft.