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Mixed Gas CCR in worldwide: 45 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 20 publish course prices.
TecDiveTools lists 45 dive centres teaching Mixed Gas CCR worldwide. 20 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). 39 of these 45 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, 34 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
TIER CORRECTION: Diver-tier advanced closed-circuit rebreather certification using mixed gas (hypoxic and normoxic blends) for deep decompression diving. Builds on Air Diluent or Helitrox CCR decompression prerequisites, extending CCR capabilities into deeper mixed-gas diving. Unit-specific training on approved rebreather models, teaching mixed-gas pre-dive checks, decompression planning specific to mixed-gas CCR, and emergency bailout procedures.
Divers must perform unit-specific mixed-gas CCR drills, demonstrate pre-dive checks for mixed-gas configurations, execute advanced decompression planning with hypoxic/normoxic mixes, manage emergency bailout procedures, and show competent buoyancy/trim on the specific rebreather unit during deep decompression dives.
45 dive centres on TecDiveTools teach TDI Mixed Gas CCR worldwide: United States (13), Egypt (7), Mexico (7), Malta (6), Indonesia (4) and Philippines (4), and 1 more. Each is listed above.
Published prices for TDI Mixed Gas CCR worldwide range across 7 centres in the TecDiveTools directory — roughly US$1,450 to US$2,250 at current exchange rates. In each centre's own currency: €1,300–€1,800 (3 centres), IDR 26,200,000–31,500,000 (2 centres) and THB 54,900–75,000 (2 centres). 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 5 and 7 days, based on the durations 4 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 IANTD CCR Normoxic Trimix Diver (15), 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.
