This zone extends from approximately 10,000 feet to approximately 50,000 feet and features reduced atmospheric pressure, inadequate oxygen, and risk of decompression sickness.

This zone extends from approximately 10,000 feet to approximately 50,000 feet and features reduced atmospheric pressure, inadequate oxygen, and risk of decompression sickness.

• A. Physiological Zone
• B. Space Equivalent Zone
• C. Physiological Deficient Zone
• D. Atmospheric Zone

Answer: (C)