What is the maximum altitude at which orientation ride passengers are allowed to fly without supplemental oxygen?

• A. 12,000 feet MSL
• B. 13,000 feet MSL
• C. 14,000 feet MSL
• D. 15,000 feet MSL

Answer: (B)

The maximum altitude at which orientation ride passengers are permitted to fly without supplemental oxygen is 13,000 feet Mean Sea Level (MSL). This regulation is based on physiological considerations regarding the effects of altitude on the human body, particularly in relation to oxygen availability.

At altitudes above 12,000 feet, the partial pressure of oxygen decreases, which can lead to hypoxia, a condition where the body doesn't receive enough oxygen. The Federal Aviation Administration (FAA) has established safety protocols to mitigate these risks, allowing unpressurized aircraft to operate up to 13,000 feet without supplemental oxygen for short exposures.

This altitude limit is important for ensuring passenger safety during orientation flights. At altitudes above this threshold, it is generally required to use supplemental oxygen to maintain adequate oxygen levels for normal functioning. Therefore, the 13,000 feet limit is designed to balance safety and operational feasibility, making it the correct choice.