Master decompression diving with TDI Decompression Procedures course at Chang Diving Koh Chang.
This course is the next step after TDI Advanced Nitrox or for certified Advanced divers. You’ll learn how to plan and conduct stage decompression dives, including use of Nitrox and Oxygen mixes.
New to the terminology? Our no-decompression limits (NDL) guide explains recreational no-stop diving — this course moves past that into mandatory decompression stops.
We’ll cover dive planning, kit configuration, decompression strategies, gas switches, and emergency protocols.
Join our fun dives and explore vibrant coral reefs, fascinating critters, and majestic marine life — including the legendary HTMS Chang Wreck.
Use our dive site map to plan your adventure or dive deeper into our Marine Life Guide and see what awaits below the surface.
Join hundreds of happy divers who've explored the underwater world of Koh Chang with us. From first-time try dives to deep wreck adventures – discover why Chang Diving is trusted since 2005. ★★★★★
Chang Diving Center offers a remarkable diving experience with exceptional instructors like Andy and Pern, who ensure a safe and enjoyable journey. Guests appreciate the knowledgeable team, excellent training, and a welcoming atmosphere. The center's well-organized trips and attention to detail, along with thoughtfully prepared onboard amenities, make it a standout choice for divers of all levels.
See reviews or write your own
“Just finished my Deep Diver and Wreck Specialty courses here with Instructor Pern – absolutely amazing experience from start to finish. Safety was always the priority, but every dive was also genuinely fun. Can't recommend Chang Diving and Instructor Pern enough.”
Read more on Google“I completed my Open Water course at Chang Diving Center and everything was perfectly organized. Great service, a very friendly and professional team, and an excellent instructor. My instructor Pern was extremely skilled, calm, and in full control at all times. Highly recommended – 10/10.”
Read more on TripAdvisor“This was my first sea dive after having qualified and the staff at Chang Diving were superb and professional ensuring my experience was the best – in fact I booked a second dive with them.”
Read more on FacebookLearn to execute dives beyond no-stop limits with confidence. Decompression Procedures prepares you for deeper, longer, more complex dives.
💸 24,990.00 THB
Learn staged decompression diving with the TDI Decompression Procedures course on Koh Chang.
💸 33,990.00 THB
Save when you book both TDI tech courses together on Koh Chang.
Book now and choose your training agency below!
Group offer: Extra 5% discount when 2 or more people book the same course together.
📩 Book NowRelated (Straight Talk): HTMS Chang: swim-through, limited & full wreck penetration —where decompression and overhead expectations meet on a real Gulf wreck.
