My husband used to be a lifeguard.  He had to be a strong swimmer, trained in CPR and first aid and certified in water rescue.  Have you ever needed a lifeguard/
I have not. I am a decent swimmer.
Lifeguard
A lifeguard is a rescuer who supervises the safety and rescue of swimmers, surfers, and other water sports participants such as in a swimming pool, water park, spa, beach or river. Lifeguards are strong swimmers and trained in CPR/AED first aid, certified in water rescue using a variety of aids and equipment depending on requirements of their particular venue. In some areas, lifeguards are part of the emergency services system to incidents and in some communities,lifeguards may function as the primary EMS provider.
I were in the water before Sir William had made an appearance. It was a very hot day, but the water struck very cold. My pupil was a much better swimmer than I, and soon outdistanced me. We were both unaware that the lake was very deep further out, and presently she shrieked out "Oh, Miss Emery, I am drowning!" I called Sir William, who was on the steps, and he called out to her not to be frightened, and that he was coming. He