This class is for students who have completed Stage 2 or can independently perform the following skills: submerge and blow out air, jump in, float on back and front for 20 seconds, tread water for 10 seconds, glide front and back for 5 yards, and swim, roll, float, roll, swim for 15 yards. In this stage, students will develop intermediate self-rescue skills, working for longer durations and greater distances than in previous stages to further enhance their swimming abilities.