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CCR Normoxic Trimix Diver in worldwide: 15 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 9 publish course prices.
TecDiveTools lists 15 dive centres teaching CCR Normoxic Trimix Diver worldwide. 9 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). 9 of these 15 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, 9 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.
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About the course
This technical rebreather course teaches CCR-qualified divers to deploy normoxic trimix on closed-circuit rebreathers, maintaining constant oxygen partial pressure for optimal efficiency at technical depths. The course covers oxygen cell management, constant-PO2 loop operation, and stage management for technical dives between 130–200 fsw (39–60 msw), forming a foundation for full technical CCR progression.
Demonstrate mastery of oxygen cell management, constant-PO2 loop operation at technical depths, stage management for normoxic trimix transitions, and comprehensive emergency protocols.
15 dive centres on TecDiveTools teach IANTD CCR Normoxic Trimix Diver worldwide: United States (6), Mexico (4), Thailand (4) and Indonesia (1). Each is listed above.
Published prices for IANTD CCR Normoxic Trimix Diver worldwide range across 2 centres in the TecDiveTools directory — roughly US$1,650 to US$1,800 at current exchange rates. In each centre's own currency: IDR 29,700,000 (1 centre) and THB 60,000 (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 6 days, based on the durations 2 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 Mixed Gas CCR (45), RAID 60m (200ft) CCR Course (1), ANDI CCR Level 4 Normoxic Trimix (1), SSI XR CCR Technical Extended Range (1) and PADI TecRec Tec 60 CCR (1). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.
