Hydronauts Diving Resort is a beachfront dive center and small resort on Koh Tao, teaching RAID scuba courses in small groups of up to four students per instructor. The team focuses on safety, personal attention and modern teaching methods, using backplate-and-wing gear setups for a more streamlined diving experience. On-site facilities include a fully equipped dive center, training pool, cafe, restaurant and beach bar. Hydronauts runs the full RAID course range, from a one-day Try Dive for first-timers through Open Water, Explorer 30, Nitrox, Deep 40, Master Rescue, Sidemount and Advanced Wreck, up to Divemaster and Instructor Development training. Daily fun-dive trips visit Koh Tao's reefs and wrecks with a dedicated dive boat, max four divers per guide, and a chance to spot whale sharks. The center supports Global Reef's marine conservation work and keeps its courses paper-free, with all learning materials provided online for life.