Advanced Open Water
The natural next step after Open Water. Deeper sites, sharper buoyancy, better navigation, and dives that stop being about the skills and start being about where you are.
2 days12,500฿
DetailsUntil Christmas our trips leave at 8:00: meet us at the shop at 7:30, back around 13:30–14:00.Why?
Home / SSI courses
International SSI training in small groups — maximum four students per instructor, our own boat, quality equipment, and instructors with more than ten years of experience. Certification arrives digitally the moment you pass.
Training dives run at Sail Rock
Start here · 3 days · SSI certification
The licence that works everywhere in the world. Three days takes you from the shallows of Koh Ma to diving independently with a buddy to 18 metres. Maximum four students per instructor, real boat dives rather than a pool, and your digital card the same day you finish. More than 400 divers have certified with us since we opened in 2024.
Every course
Once you are certified, the Gulf opens up. These are the courses we run from Chaloklum, all in the same small groups on the same boat.
The natural next step after Open Water. Deeper sites, sharper buoyancy, better navigation, and dives that stop being about the skills and start being about where you are.
2 days12,500฿
Details
Our recommendation after Open Water. The SSI Specialty Diver rating comes from any two specialties, and of the twenty or so on offer, Deep and Enriched Air Nitrox are the two that genuinely extend what you can do: 40 metres at Sail Rock, and longer, safer bottom times on every dive.
2 days13,500฿
Details
Sail Rock drops to 40 metres and this is the course that lets you use all of it. Gas planning, narcosis, no-deco limits and the discipline that makes deep dives boring in the best possible way.
2 days8,500฿
Details
The course that changes how you dive with other people. Recognising problems before they become problems, managing them when they do, and becoming the buddy everyone wants on their boat.
2 days11,600฿
Details
More bottom time, shorter surface intervals, and less fatigue at the end of a two-dive day. The theory alone is 4,500฿, or 7,500฿ with two dives on nitrox at Sail Rock.
Theory only4,500฿
Details
Your first professional level. One month of unlimited diving, mentored day to day by our lead instructor. We train only two or three divemasters a year, so it starts with a conversation.
1 month36,000฿
DetailsNot sure?
Send us your certification level, how many dives you have logged and what you want out of the water — turtles, photography, depth, or just being more relaxed down there. We will give you a straight answer, even if that answer is "you don't need a course".
Koh Ma · where courses begin
How we teach
Our team has spent more than a decade teaching in Egypt, the Philippines, Cambodia, Vietnam and Indonesia, and we bring the same standard here: clear briefings, sites chosen by the tide rather than the timetable, and dive plans built around the people actually on the boat.
Message us with your dates and we will tell you honestly what fits — including whether you should start with a Try Dive instead.
Thinking about going pro? See the Divemaster course.