Normoxic Trimix Training
IANTD Normoxic Trimix Diver training is for technical divers who want to use helium-based breathing gases for deeper dives while avoiding air as the primary gas below the normal deep-air range. The official IANTD page states that the program is designed for dives between 130 fsw and 200 fsw, using helium-based mixtures to reduce narcosis. The course moves the diver beyond advanced nitrox thinking into full mixed-gas planning, where gas choice, decompression strategy, reserves, and team procedures must all work together.
This course is intended for divers with a solid technical background. IANTD lists Advanced EANx Diver or higher, or an equivalent qualification, as a prerequisite, plus minimum age and substantial logged dive experience, including deeper dives. Students should already be comfortable with decompression stops, technical equipment, precise buoyancy, gas switches, and conservative decision-making before adding normoxic trimix planning to their diving.
Training usually includes academic sessions, confined-water skill work, and open-water dives. In High Springs, Florida, the course can be an important step for divers who want clearer thinking and better control on deep technical dives. The expected outcome is not just permission to use trimix; it is the ability to plan, analyze, brief, execute, and debrief deeper mixed-gas dives with stronger judgment and cleaner procedures.
