Which system is used to provide oxygen for medical emergencies not involving decompression?

• A. First aid oxygen
• B. Emergency cabin oxygen system
• C. Supplemental oxygen
• D. AviOX bottle oxygen

Answer: (A)

Oxygen systems on board serve different purposes, and this question tests which one is meant for immediate medical care when there’s no loss of cabin pressure. Portable first aid oxygen is designed for on-the-spot therapy during medical emergencies that aren’t caused by decompression. It allows crew to provide oxygen quickly to passengers or crew in distress without relying on the aircraft’s cabin oxygen system.

The emergency cabin oxygen system is reserved for situations involving a loss of pressurization; it automatically supplies oxygen to the cabin and is not the device used for routine medical incidents. Supplemental oxygen refers to oxygen provided to occupants at altitude when indicated to prevent hypoxia for broader needs, not typically used as the on-scene treatment for a single medical event. AviOX bottle oxygen describes a portable oxygen product, but in aviation training contexts the standard term for on-board medical use is first aid oxygen, which is specifically intended for non-decompression medical emergencies.