Simply Scuba Koh Tao is a beachfront PADI dive center on Sairee Beach that has certified more than 3,000 divers. The team, led by instructor Dave, runs the full range of beginner and continuing-education courses in small groups, from a half-day Try Scuba experience through Scuba Diver and Open Water certification, up to Advanced Open Water, Rescue Diver, specialty courses and professional-level Divemaster and IDC programs. The center operates two custom dive boats and two training pools, with air-conditioned classrooms and all gear included in course prices. Daily dive trips run to Koh Tao's reef sites and to Sail Rock, known for its dramatic walls and whale shark sightings. Simply Scuba is family-friendly, welcoming divers from age 10, and takes part in local marine conservation efforts such as Dive Against Debris.