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Trimix Diver in worldwide: 22 instructors on TecDiveTools, with the agencies and courses each teaches, and a summary of what students say.
TecDiveTools lists 22 instructors teaching Trimix Diver worldwide.
Listings are ordered by how much evidence exists about their technical diving, not by a star rating, with any paid Featured listing shown first and marked as such (how rankings work). 10 of these 22 carry reviews we have read and classified as being about technical or overhead training. The count excludes recreational certifications by name, so a busy resort does not outrank a one-instructor cave operation on the volume of its reef trips. Separately, 10 have a written synthesis of what reviewers say about them. How we read and count reviews.
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About the course
Advanced technical open-circuit diving using trimix gas mixtures to depths up to 333 fsw (100 msw) with extended decompression procedures. Teaches advanced gas blending, multiple-gas switches, complex decompression management, and self-reliance at extreme depths. Enables exploration of the world's deepest wrecks and cave systems.
22 instructors on TecDiveTools teach IANTD Trimix Diver worldwide: United States (12), Mexico (5), Thailand (4) and Indonesia (1). Each is listed above.
Published prices for IANTD Trimix Diver worldwide range across 8 centres in the TecDiveTools directory — roughly US$750 to US$5,650 at current exchange rates. In each centre's own currency: €995–€5,000 (3 centres), $756–$2,400 (2 centres), THB 60,000 (2 centres) and IDR 20,700,000 (1 centre). 1 centre charges by the day instead, which is not comparable with a course total. Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.
Between 4 and 8 days, based on the durations 6 centres publish for it worldwide. The time depends on the centre's schedule, weather, and how quickly the required skills are demonstrated — agencies set a minimum number of dives, not a fixed number of days.
At the same tier in TecDiveTools' cross-agency comparison, instructors worldwide also teach TDI Advanced Trimix (132) and PADI TecRec Tec Trimix Diver (3). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.