halocline
Contributor
Maybe learning to dive will help you to work on your fitness so that you can swim more than 100 meters. Regardless of the class requirements, you will probably enjoy diving more with greater in-water stamina, and you will definitely improve your air consumption. Diving is physically pretty easy, especially when you have developed buoyancy and trim skills, but you can always benefit from improved fitness in and out of the water. So enjoy it!