What is the purpose of carrying multiple quick don oxygen masks in the flight deck?

Carrying multiple quick don oxygen masks in the flight deck serves a crucial safety function, specifically for emergency situations requiring immediate access. In the event of a sudden loss of cabin pressure or other circumstances that lead to diminished air quality, the ability to quickly don an oxygen mask becomes essential for maintaining crew health and ensuring the continued safe operation of the aircraft.

These oxygen masks are designed for rapid deployment, allowing pilots to quickly obtain the necessary oxygen to prevent hypoxia—a condition that can impair cognitive and physical abilities. Since the flight deck is often a confined area with limited time for response during an emergency, having multiple masks ensures that each crew member has immediate access to one, thus enhancing overall safety during critical situations.

Other purposes, such as entertaining passengers or being used solely by cabin crew, do not relate to the primary safety function of these masks in emergencies. Additionally, while maintenance checks are essential for aircraft operation, they are not relevant to the emergency function of the quick don oxygen masks.