What is the required protocol for a pilot flying over 12,500' for more than 30 minutes?

When flying at altitudes above 12,500 feet for more than 30 minutes, the requirement is to use supplemental oxygen. This protocol is essential because, at such altitudes, the partial pressure of oxygen decreases significantly, which can lead to hypoxia—a condition where the body doesn't get enough oxygen.

Hypoxia can impair cognitive function, physical performance, and overall decision-making abilities, posing a significant risk to pilots. By using supplemental oxygen, pilots can maintain adequate levels of oxygen in the blood, helping to ensure that they remain alert and capable of managing the aircraft effectively.

Understanding the physiological effects of altitude is crucial for pilots, particularly in situations where extended exposure to high altitude can occur. This requirement enhances safety and helps pilots perform their duties reliably when flying at higher altitudes. Thus, using supplemental oxygen is not only a standard practice but a critical safety measure in aviation.