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 10 yards, and swim, roll, float, roll, swim for 5 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.