Technical Diving Without Compromise
Youβve learned to manage decompression.
Youβve learned to use helium to improve performance.
Now itβs time to take full control of deep mixed-gas rebreather diving.
The CCR Mixed Gas Diver Course is your transition into true deep technical CCR operations β using helium-based diluents with reduced oxygen fractions to safely plan and execute significantly deeper dives with full decompression.
This is where advanced rebreather diving becomes serious exploration.
Delivered under the standards of Technical Diving International (TDI), and taught through the disciplined training methodology of ESS-TEK, this programme develops divers capable of planning and executing complex mixed-gas CCR dives with precision and confidence.
Training is conducted on professional-grade rebreather systems including the Inspiration Rebreather, engineered for demanding technical diving environments.
🌊 What Changes at the Mixed Gas Level?
This is a major step beyond recreational or moderate technical CCR diving.
Mixed gas training introduces:
β Helium-based diluent mixtures for deep diving
β Reduced oxygen fractions to manage depth safely
β Complex decompression planning and execution
β Multi-stage bailout strategies
β Increased equipment configuration and gas logistics
β Significantly higher task loading and responsibility
You are no longer simply extending dives β you are planning and executing deep technical missions with a life-support system.
🎯 What This Course Qualifies You To Do
During this programme you will learn to safely conduct:
β Deep CCR dives using mixed-gas diluent
β Advanced decompression dive profiles
β Multi-gas bailout planning and execution
β Extended runtime technical dives
β Complex dive planning with depth-appropriate gas selection
Upon successful completion, you may conduct mixed-gas CCR dives within training limits and environmental conditions similar to those experienced during the course.
🧭 The ESS-TEK Training Philosophy
Depth magnifies everything β workload, exposure, consequences, and responsibility.
At ESS-TEK, training is structured to build divers who remain calm, precise, and methodical in demanding technical environments.
We develop divers who:
β Understand deep diving physiology and gas behaviour
β Plan conservatively and execute precisely
β Maintain control under increased task loading
β Anticipate problems before they escalate
β Manage multiple systems and contingencies simultaneously
Progression to this level is never rushed.
Deep diving requires genuine competence.
👤 Who This Course Is For
This course is designed for experienced CCR divers who want to:
π Extend depth capability significantly
π§ Reduce narcosis and maintain clarity at depth
π Plan complex mixed-gas decompression dives
β Master advanced rebreather system management
π― Progress toward elite-level technical diving
If your goal is serious technical exploration β this is the gateway.
📋 Entry Requirements
To enrol, you must:
β Hold CCR Helitrox Diver (or equivalent) certification
β Demonstrate strong decompression discipline and buoyancy control
β Meet minimum logged CCR dive experience requirements
β Show readiness for increased planning and operational complexity
This is advanced training for divers already comfortable with technical procedures.
🧠 What You Will Learn
This course develops deep technical understanding and high-precision execution.
Mixed Gas Theory & Physiology
β Effects of helium at significant depth
β Oxygen fraction management in deep environments
β Gas density and work of breathing considerations
β Advanced decompression modelling
Dive Planning & Technical Logistics
β Deep mixed-gas diluent planning
β Multi-stage decompression strategies
β Complex bailout configuration
β Equipment redundancy planning
Advanced CCR Operation
β PPOβ control across large depth ranges
β Loop management during deep exposure
β Gas monitoring under increased workload
β Failure recognition and response in deep environments
🌊 In-Water Training Focus
Your dives will emphasise:
β Precision buoyancy at depth
β Stable PPOβ management across changing depth
β Structured deep ascent discipline
β Accurate decompression stop execution
β Multi-gas awareness and monitoring
β Realistic contingency response
Training focuses on control, composure, and accuracy under significant operational demand.
🛟 Critical Skill Development
You will demonstrate competence in:
β Deep mixed-gas dive planning and briefing
β Gas analysis and verification procedures
β Multi-stage bailout deployment
β Stable decompression control across long profiles
β Emergency management at depth
β Equipment configuration for deep technical diving
β Post-dive analysis and performance evaluation
This level demands consistency, precision, and disciplined execution.
🎓 Certification Requirements
To graduate, you must:
β Successfully complete all knowledge development
β Plan and execute mixed-gas CCR dives correctly
β Maintain strict decompression discipline
β Demonstrate mature judgement and decision-making
β Meet all performance standards across practical sessions
Certification reflects real operational competence.
⭐ Why Train This Level With ESS-TEK?
Deep mixed-gas diving exposes weaknesses instantly.
Our training ensures you develop:
β Structured deep dive planning habits
β Calm decision-making under pressure
β Precision buoyancy and decompression control
β Full understanding of gas strategy and logistics
β Confidence managing complex dive operations
We donβt just train divers to go deeper.
We train divers to operate correctly when they get there.
🚀 Continue Your CCR Progression
CCR Mixed Gas Diver is a major milestone in technical diving development.
It prepares you for:
β Extreme depth CCR diving
β Highly complex decompression profiles
β Multi-layered contingency planning
β Advanced mission-level dive execution
β The final step β Advanced Mixed Gas CCR training
If you are ready for deeper water, higher precision, and greater responsibility β this is your next progression.
Train with discipline.
Plan with precision.
Dive with purpose.