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Advanced Mixed Gas CCR in the United States: 11 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 2 publish course prices.
TecDiveTools lists 11 dive centres teaching Advanced Mixed Gas CCR in the United States. 2 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). 10 of these 11 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.
Looking for individual instructors instead? Instructors in United States.
About the course
The most advanced closed-circuit rebreather certification in TDI's progression, extending mixed-gas CCR diving to 100m/330ft. It's for divers who've built real time on the Mixed Gas CCR course and want to push the unit to its deepest technical range, combining hypoxic trimix gas planning with rebreather-specific bailout procedures. It's the final rung on TDI's CCR ladder — there's no further depth-tier CCR course beyond it. Taught entirely on the specific rebreather unit, in open water, with substantial logged time on that unit required before enrolling.
Instructor trainer competencies: unit-specific emergency procedures, hypoxic gas management instruction, multi-stage decompression teaching, student assessment at extreme depths, risk management for deep rebreather operations
11 dive centres on TecDiveTools teach TDI Advanced Mixed Gas CCR in the United States: North Florida Cave Country (5), Southeast Florida (4), Florida Keys (1) and Florida West Coast (Tampa Bay) (1). Each is listed above.
Rebreathers are common in Florida's cave community for long penetrations, and the springs' constant temperature and depth make them a practical place to build hours on a unit.
At the same tier in TecDiveTools' cross-agency comparison, dive centres in the United States also teach IANTD CCR Trimix Diver (4). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.
The centres listed above teach TDI Advanced Mixed Gas CCR in United States. Requirements are set by the agency, not the centre, so they are the same wherever you train — what differs is price, class size and how much diving is included.