Prerequisites: Must be able to swim 100 yards of freestyle and backstroke. Must be able to swim 50 yards of sidestroke, elementary backstroke and breaststroke. Must have a mastery of rotary breathing and have a stroke endurance to swim many lengths in a row. At this advanced level, students work on refining freestyle, backstroke, breaststroke, and butterfly, while increasing endurance. Diving and turns are a continued focus.