Technical diving courses in Sri Lanka
I teach technical diving on both coasts of Sri Lanka, Colombo on the west and Batticaloa on the east, with Serendib Scuba and Sri Lanka Diving Tours. The courses run from sidemount and Tec 40 through trimix to 100 m and the KISS Sidewinder rebreather.
Taught by Donarun Das: TDI Trimix Instructor, KISS Sidewinder CCR Instructor, PADI Staff Instructor. Updated .
Where I teach in Sri Lanka
Colombo
West coast
Most international flights to Sri Lanka land here, so a course can start without a transfer across the island.
Batticaloa
East coast
The east coast, and the wreck of HMS Hermes, the aircraft carrier sunk off Batticaloa in 1942. It lies past 50 m, which puts it squarely in trimix and rebreather territory.
Courses in Sri Lanka
Tec 40 / Intro to Tech
3 days
The first step into technical diving: limited decompression stops, real gas planning, and the discipline shift that separates technical divers from recreational ones. PADI Tec 40 or TDI Intro to Tech.
Tec 45 / Advanced Nitrox & Decompression Procedures
4 to 5 days
Genuine staged decompression to 45m: multiple deco gases, failure management mid-dive, and the discipline that comes from knowing you can't abort to the surface. PADI Tec 45 or TDI Advanced Nitrox & Decompression Procedures.
Tec 50 / Extended Range
4 to 5 days
Air and nitrox to 55m, the ceiling of air-range technical diving, where narcosis becomes a management problem rather than a background condition, and where the argument for trimix moves from theory to lived experience.
Trimix 60 to 75m
4 to 5 days
Normoxic and hypoxic trimix for the 60 to 75m range: helium gas planning, the narcosis reversal you have to experience to understand, multi-stage logistics, and the gas supply chain that makes trimix training actually work in this region.
Advanced Trimix / Road to 100m
5 days
Hypoxic trimix to 100m: multi-gas decompression management, expedition-level planning, and failure response at the depth where consequences compound fastest. PADI Tec 100 or TDI Advanced Trimix.
Sidewinder CCR MOD1
6 to 7 days
CCR MOD1 on the KISS Sidewinder sidemount rebreather, for divers who understand that rebreathers kill at ten times the rate of open-circuit and want the training discipline that makes the difference. Expedition experience across caves, ocean, and deep walls.
Sidemount Diver
4 days
4 days, 3 long dives, 1 pool session: proper sidemount configuration, buoyancy and trim specific to sidemount, and the body mechanics that make it feel like it was designed for you.
Common questions
Can I learn technical diving in Sri Lanka?
Yes. Tec 40, 45 and 50, trimix to 100 m, sidemount and KISS Sidewinder CCR courses run in Colombo and Batticaloa.
Can I do a CCR rebreather course in Sri Lanka?
Yes. The KISS Sidewinder CCR MOD1 course runs in Sri Lanka.
Can I dive HMS Hermes?
The Hermes lies off Batticaloa past 50 m. It is a decompression dive and needs technical training first, which is what the courses here build towards.
Are there fixed course dates?
No. Dates are set around your travel and your current certification level. The schedule page lists the courses already planned.
Plan a course in Sri Lanka
Tell me your current certification and when you can travel, and I will suggest a course and dates.