Why take the CCR Nitrox / Helitrox Diver course?
Closed-Circuit Rebreather Nitrox / Helitrox Diver (Fundamentals) course is designed to help divers make a smooth transition from open-circuit to closed-circuit diving. The course provides a structured, supportive environment where divers can build essential skills in rebreather management, maintenance, and operational protocols. Emphasizing safety and confidence, it challenges students to master the key aspects of rebreather diving while ensuring a solid foundation for future technical diving. This class is a prerequisite for more advanced CCR training.
Who is it for?
The Closed-Circuit Rebreather Nitrox / Helitrox Diver (Fundamentals) course is for divers certified as Technical divers with 25 dives logged since completing the Technical class and 100 total logged dives who want to learn to dive with a closed-circuit rebreather.
This course gives divers the tools to build and enhance their closed-circuit diving abilities in preparation for technical or cave diving with a CCR.
What will I learn?
Course outcomes include, but are not limited to, a competent and comfortable CCR diver with solid personal and team skills; knowledge of rebreather preparation, function, dive operation, and how to act if experiencing failures; competence in performing a bailout to open-circuit, including ascent protocol; and the ability to plan recreational dives, including gas management, absorbent canister endurance planning, oxygen toxicity management, and minimum decompression ascents.
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Applicants must:
- Be qualified in Advanced Open Water Diver and Nitrox or equivalent;
- Be a minimum of 18 years of age or 15 with a parent or guardian authorization;
- Be physically and mentally fit;
- Obtain a physician’s prior written authorization for the use of prescription drugs, except for birth control, or for any medical condition that may pose a risk while diving;
- Be experienced with technical diving configuration and related skills (minimum skills required: Basic 5, V-Drill, S-Drill, 6 propulsion techniques, including back kicks and helicopter turn, have perfect buoyancy, have perfect trim no more than 20 degrees out of neutral). Please refer to INTRO TO TECH / ESSENTIAL + NITROX CLASS for more information;
- Have a minimum of 100 logged dives.
The Closed-Circuit Rebreather Nitrox / Helitrox Diver (Fundamentals) course normally lasts five days. It requires at least 10 dives and 200 minutes of dive time, plus classroom lectures, land drills, and in-water work. Transfer from Playa del Carmen is included.
Students must bring their own tech-level diving gear (requirements will be provided upon registration) or borrow/rent it, pay for their gases and tank rentals, cenote entree and agency certification fees is not included
Order your INTRO TO TECH / ESSENTIAL / BASIC NITROX CLASS now
OK GUYS, I’M GONNA BE YOUR CCR INSTRUCTOR

Alexander Vronsky
Founder, Cave Ha Diving Mexico
IANTD and IDF Instructor Trainer. IDF Course Director.
Cave and technical instructor trainer: Cavern to Technical Cave, Technical to Master Deep.
CCR instructor: Dual CCR and Dual CCR Cave, GBM CCR (Nitrox to Trimix 100), S7 CCR (Nitrox to Helitrox), CCR Cave, CCR Technical Cave, and CCR Expedition Cave on GBM, S7, SF2, JJ, and Fathom.
Authorized dealer for S7 and GBM rebreathers. TDI technical instructor.
GUE member. GUE Cave 2, Cave DPV, Cave CCR, CCR 2, Tec 3
Elected representative of CREER (Comité Regional de Espeleobuceo, Ecología y Regulación), the regional cave diving committee of Quintana Roo.
Alexander lives and teaches year-round in Playa del Carmen, in the Riviera Maya, home to nine of the ten largest underwater cave systems in the world. He trained every cave and technical instructor on the Cave Ha team.
Before dedicating himself to diving, Alexander spent many years running large-scale technical and broadcast operations, including for the Olympic and Paralympic Games. That background is why the logistics behind every course here simply work.
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