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Helitrox CCR in worldwide: 42 instructors on TecDiveTools, with the agencies and courses each teaches, and a summary of what students say.
TecDiveTools lists 42 instructors teaching Helitrox CCR worldwide.
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). 26 of these 42 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, 20 have a written synthesis of what reviewers say about them. How we read and count reviews.
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About the course
DIVER-TIER CORRECTION: Entry-level closed-circuit rebreather certification using helium-diluted mix (up to 35% helium, minimum 20% oxygen) for no-decompression CCR diving to 45m/150ft. Teaches helium-diluent-specific pre-dive checks, gas planning, and bailout procedures on a rebreather unit. Designed for nitrox-certified divers wanting narcosis relief with helium on a CCR without committing to decompression diving. Opens the door to Helitrox CCR Decompression Procedures.
Divers must demonstrate competent pre-dive checks, gas planning for helitrox mixes, emergency bailout procedures, buoyancy control, and unit-specific operation in confined and open water conditions.
42 instructors on TecDiveTools teach TDI Helitrox CCR worldwide: Egypt (8), Indonesia (8), United States (8), Malta (7), Philippines (5) and Mexico (3), and 1 more. Each is listed above.
Published prices for TDI Helitrox CCR worldwide range across 4 centres in the TecDiveTools directory — roughly US$1,100 to US$1,700 at current exchange rates. In each centre's own currency: IDR 24,900,000–29,700,000 (2 centres), €1,200 (1 centre) and THB 37,500 (1 centre). Prices differ mainly in what they include, so compare the inclusions before comparing the numbers. Prices were last checked in September 2026.
Between 3 and 7 days, based on the durations 3 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, instructors worldwide also teach IANTD CCR Advanced Recreational Trimix Diver (31) and SSI XR CCR Extended Range Trimix (1). They are comparable rather than interchangeable — each agency sets its own standards and card, so check which one your next course accepts.