What is the primary function of oxygen systems in an aircraft?

The primary function of oxygen systems in an aircraft is to supply supplemental oxygen during cabin depressurization. In the event of a sudden loss of pressure in the cabin, the oxygen system is designed to provide passengers and crew with the necessary oxygen to breathe comfortably until the aircraft can descend to a lower altitude where the atmospheric pressure is sufficient for normal breathing. This is particularly crucial because, at high altitudes, the lower air pressure can lead to hypoxia, a condition where the body does not receive enough oxygen.

The oxygen system is typically equipped with masks that automatically deploy in a depressurization event, ensuring that individuals can quickly access supplemental oxygen. Understanding this function is vital for the safety and well-being of everyone on board, as it directly addresses the physiological needs during a critical situation.