What is the purpose of the emergency oxygen system?

The purpose of the emergency oxygen system is to supply additional oxygen during emergencies, particularly when the normal oxygen supply is compromised or when there is a sudden loss of cabin pressure. This system is critical for ensuring the safety of the flight crew and passengers at high altitudes, where the available oxygen is insufficient for normal breathing due to lower atmospheric pressure.

When an emergency occurs, such as a rapid decompression, the emergency oxygen system is designed to provide a supplemental oxygen source, allowing individuals to maintain adequate oxygen levels until the situation is resolved or until descent to a safer altitude can be achieved. This aspect of the system is vital for survival in case of hypoxia-inducing situations, ensuring that all personnel can breathe comfortably even under life-threatening conditions.

Other options, such as providing pressurization, monitoring cabin pressure, or eliminating cabin humidity, do not relate to the primary function of the emergency oxygen system. These functionalities might be part of different systems onboard the aircraft, but they do not pertain to the specific aim of delivering oxygen in emergencies.