The purpose of the RLSS is to train boys in basic skills to help save lives and make the swimming pool a safe zone for all. Open to B form and above, the volunteers assist the master or the coach on duty on a regular basis and create awareness about basic pool safety. Behind the scenes, a pool lifeguard is often involved in the maintenance of the pool itself. This means making sure the water is filtering properly, and routinely testing the chlorine levels of the water to make sure they are at proper levels. It takes approximately twenty-one teaching sessions and many days of practice before the boys sit for a physical and a written examination in order to qualify as a lifesaver or lifeguard. They also have to pass a basic first-aid test taken by the school doctor.