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Air Diluent CCR in worldwide: 85 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 34 publish course prices.
TecDiveTools lists 85 dive centres teaching Air Diluent CCR worldwide. 34 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). 67 of these 85 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, 53 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
Entry-level closed-circuit rebreather certification for nitrox-certified divers transitioning to rebreather diving. Teaches unit operation, pre-dive checks, buoyancy and trim on CCR, and bailout procedures without staged decompression to 30m/100ft maximum depth. Gateway to more advanced rebreather diving.
Minimum 7 dives with 420 minutes accumulated bottom time, maximum 30m/100ft depth. Land drills: unit-specific pre-dive checks, hypoxia recognition, bailout procedures. In-water skills: CCR-specific buoyancy and trim, unit operation, bailout execution, hypoxic awareness. Competency demonstration on specific unit.
85 dive centres on TecDiveTools teach TDI Air Diluent CCR worldwide: United States (25), Indonesia (13), Egypt (11), Thailand (11), Mexico (10) and Malta (9), and 1 more. Each is listed above.
Published prices for TDI Air Diluent CCR worldwide range across 7 centres in the TecDiveTools directory — roughly US$1,200 to US$2,250 at current exchange rates. In each centre's own currency: IDR 23,000,000–29,000,000 (4 centres), €1,100–€1,500 (2 centres) and THB 75,000 (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 5 and 7 days, based on the durations 5 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 RAID 30m (100ft) CCR Course (2), ANDI CCR Level 2 (Unit Specific) (2) and PADI TecRec Tec 40 CCR (1). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.
