What is the primary function of the POB during a flight?

The primary function of the Portable Oxygen Bottle (POB) during a flight is to offer oxygen to passengers who are having trouble breathing. In aviation, altitude and cabin pressure changes can impact individuals with pre-existing respiratory conditions, or even healthy passengers, leading to hypoxia, which is insufficient oxygen in the body. The POB is designed to provide supplemental oxygen for such situations, allowing passengers to breathe more easily and maintain adequate oxygen levels.

While providing food, entertainment, or serving as a flotation device are important aspects of in-flight service and safety, they do not align with the specific purpose of the POB. The focus of the POB's design and implementation is strictly health-related, addressing the need for oxygen in emergencies and ensuring that passengers can receive immediate assistance when experiencing respiratory difficulties.