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Normoxic Trimix Diver in the United States: 7 dive centres on TecDiveTools, with agencies, courses taught and a summary of what students say. 1 publish course prices.
TecDiveTools lists 7 dive centres teaching Normoxic Trimix Diver in the United States. 1 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). 5 of these 7 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, 4 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
Normoxic Trimix is a technical mixed-gas certification designed to extend depth range to 132–200 fsw (40–60 msw) while managing nitrogen narcosis through trimix theory. This course trains divers in gas blending basics, narcosis mitigation, decompression procedures using nitrox decompression gases, and safe single-gas-switch profiles. The qualification bridges recreational and advanced technical diving, unlocking deeper technical wreck and cave progressions.
Demonstrate safe trimix gas blending, narcosis management through depth planning, decompression gas selection and switching, gas management on technical dives, and emergency procedures specific to mixed-gas technical profiles.
The centres listed above teach IANTD Normoxic Trimix Diver 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.
7 dive centres on TecDiveTools teach IANTD Normoxic Trimix Diver in the United States: North Florida Cave Country (5), Florida West Coast (Tampa Bay) (1) and Southeast Florida (1). Each is listed above.
Deep training usually means offshore wrecks — the Spiegel Grove and Bibb at around 40 m off Key Largo, and the USS Oriskany, whose flight deck at about 43 m and sand at about 65 m take you into trimix territory.
At the same tier in TecDiveTools' cross-agency comparison, dive centres in the United States also teach TDI Trimix (32). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.