What is the function of spare SCBA cylinders?

The function of spare SCBA (Self-Contained Breathing Apparatus) cylinders is to provide additional air supply for firefighters. When engaged in firefighting operations, firefighters may need to rotate through different SCBA cylinders to ensure that they have adequate breathing air while working in hazardous environments. The use of spare cylinders allows them to have a backup supply readily available, thus enhancing safety and operational efficiency. Having spare cylinders on hand is crucial since SCBAs are essential in protecting firefighters from smoke, toxic gases, and other asphyxiating conditions they may encounter in a fire situation. This ensures that they can continue their life-saving work without the interruption of running out of breathable air.