At cabin pressure altitudes above 15,000 feet, what is required for each occupant?

At cabin pressure altitudes above 15,000 feet, it is essential for each occupant to be provided with supplemental oxygen due to the reduced availability of oxygen at these heights, which can lead to hypoxia—a condition caused by insufficient oxygen reaching the body’s tissues. At such altitudes, the atmospheric pressure is low, leading to a decrease in the partial pressure of oxygen, making it difficult for the body to obtain adequate oxygen for normal function.

Providing supplemental oxygen helps to ensure that all occupants maintain proper oxygen saturation levels, thus preventing any negative health effects that can arise from low oxygen levels. This requirement is in line with aviation safety regulations, which aim to protect both crew and passengers during flights at high altitudes. Therefore, ensuring each occupant has access to supplemental oxygen at high altitudes is crucial for their safety and well-being.