Loading dive centres and instructors…
Advanced Recreational Trimix Diver in worldwide: 23 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 18 publish course prices.
TecDiveTools lists 23 dive centres teaching Advanced Recreational Trimix Diver worldwide. 18 of them publish course prices, in the currency the shop advertises and with the date each was checked — not converted, and not estimated.
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). 14 of these 23 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, 13 have at least one instructor whose reviews we have read and summarised — a dive centre carries no synthesis of its own. How we read and count reviews.
Looking for individual instructors instead? Instructors.
About the course
This open-circuit course teaches recreational divers to manage helium-based gas mixtures at greater depths, reducing nitrogen narcosis while maintaining recreational-level decompression procedures and dive planning. You'll learn multi-mix deployment strategies, hyperbaric narcosis avoidance, and stage cylinder management for air/EANx/trimix transitions. This course unlocks deep recreational technical diving and is a gateway to full technical trimix certification for divers seeking to explore the world's deepest recreational dive sites.
23 dive centres on TecDiveTools teach IANTD Advanced Recreational Trimix Diver worldwide: Thailand (11), Mexico (9), Indonesia (2) and United States (1). Each is listed above.
Published prices for IANTD Advanced Recreational Trimix Diver worldwide range across 3 centres in the TecDiveTools directory — roughly US$700 to US$1,200 at current exchange rates. In each centre's own currency: IDR 18,000,000–20,700,000 (2 centres) and THB 25,000 (1 centre). 2 centres charge 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 6 days, based on the durations 3 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, dive centres worldwide also teach TDI Helitrox (89). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.
