What is the minimum oxygen requirement for each occupant at altitudes above 15,000'?

At altitudes above 15,000 feet, the minimum oxygen requirement mandates that each occupant must be provided with supplemental oxygen. This regulation arises because the partial pressure of oxygen decreases significantly as altitude increases, leading to an increased risk of hypoxia, which can impair cognitive and physical performance.

By ensuring that each passenger and crew member has access to supplemental oxygen, it helps to mitigate the physiological effects of high-altitude flight. This is vital for maintaining the safety and well-being of everyone on board, as even brief periods without adequate oxygen can lead to serious impairments.

In contrast, pilots alone do not suffice in terms of oxygen provision; the risk applies to all occupants, including passengers. Thus, proper measures must be taken to equip all individuals with the necessary oxygen supplies to prevent hypoxia and ensure safety during flights at these altitudes.