RAID OPEN CIRCUIT TEC
Experience the next stage of your diving development with Stuart Girdler.
Train in Twinset or Sidemount with RAID’s modern, ISO-aligned technical diving system.
RAID Open Circuit Tec Training
Technical diving demands precision, discipline, and complete control. At Diving Disciplines, Stuart Girdler delivers RAID’s full OC technical pathway in either Twinset or Sidemount, giving divers the flexibility to progress using their preferred configuration.
This pathway takes you beyond recreational limits and prepares you for advanced decompression, multi-gas planning, extended bottom times, and safe execution of deep dives up to 60 metres using mixed gas. Dive deeper with confidence, backed by RAID’s updated curriculum and Stuart’s operational-level expertise.
What OC Tec Courses Cover:
Advanced gas planning & decompression modelling
Expedition-level buoyancy, trim, and propulsion
Team protocols & situational control
Deep-water emergency & bailout preparation
What OC Tec Courses Are Available:
All OC twinset and sidemount 40m Air to 100m Hypoxic Trimix at diver and instructor level.
Deco Diver 40m air/eanx
Develop the skills to execute longer, deeper, multi-stop decompression dives with full mixed-gas capability.
Deco Diver 45m air/eanx
Master advanced dive planning and the logistics of managing a single decompression stage for extended range.
Limited Trimix Deco 45m TMX
A helium-light deco course introducing efficient gas planning, safe ascents, and the discipline needed to progress deeper.
ADV Deco 50m air/eanx
Extend your capabilities to 50 metres using multiple decompression stages to safely optimize your ascent profile.
Trimix Deco 50m Tmx
Develop the skills to execute longer, deeper, multi-stop decompression dives with full mixed-gas capability.
Normoxic Deco 60m
Master advanced dive planning, multi-gas switching, and extended deco using normoxic trimix to 60 metres.
Hypoxic Trimix 80m/100m
The pinnacle of technical diving, utilizing hypoxic gas mixes for elite deep-sea exploration and expeditions.
RAID TEC INSTRUCTOR
Transition into the professional tier by learning to teach and certify the next generation of RAID technical divers.
RAID INSTRUCTOR CROSSOVER
A streamlined program for existing technical instructors to transition their professional ratings to the RAID system.
Why train OC Tec With Stuart Girdler?
Decades of technical diving, expedition leadership, and instructor-trainer experience make Stuart one of RAID’s most trusted technical educators. His training style is precise, structured, and operationally driven, focusing on real-world capability rather than box-ticking.
With small class ratios and uncompromising safety standards, you learn to dive deeper, longer, and more efficiently—while maintaining absolute control in every phase of the dive.
What You Will Master:
Gas & Decompression Planning: Learn advanced gas modelling, stage-gas workflows, ascent strategies, and multi-stop decompression procedures for extended-range diving.
Configuration Precision: Develop disciplined equipment management, gas-switch accuracy, pre-dive checks, and in-water competency using Twinset or Sidemount—without favouring one configuration over the other.
Emergency Preparedness: Master high-stress drills, bailout protocols, and situational management designed for deep environments and complex decompression obligations.
Technical Buoyancy & Trim: Build the control and consistency expected of RAID technical divers, ensuring stability, repeatability, and efficiency at depth.
The RAID OC Tec Pathway
RAID’s modern 40–60 metre Open Circuit Technical pathway provides a clear, structured progression for divers stepping into deeper, mixed-gas environments. Stuart delivers every course within the pathway, guiding divers from their first decompression skills through to advanced trimix capability.
While all levels are available, Stuart’s primary focus, and the area where he offers the deepest expertise, is Trimix Open Circuit training. The UK’s colder waters, limited visibility, and demanding wreck environments make helium-based diving the superior and safer choice, providing reduced narcosis, cleaner decision-making, and greater control at depth.
Your Structured Diver Progression
Given the UK’s environmental conditions, this is the recommended progression:
Decompression: RAID Limited Trimix Decompression 45m
Air / Nitrox / Helium-light
Advanced Decompression: RAID Advanced Decompression 50m
Full trimix & extended decompressionNormoxic Decompression: RAID Normoxic Decompression 60m
Deep mixed-gas decompression & extended bottom times
Why Stuart Specialises in Trimix-Based OC Training
The UK’s cold water, variable visibility, and depth profiles make helium a safer, clearer-headed, and more controlled choice for serious technical training. Stuart’s OC Tec programs reflect this, emphasising precision, gas management discipline, narcosis mitigation, and real-world operational skill.
Helium isn’t a luxury at depth, it’s a safety tool.
Become A RAID Technical Instructor
Ready to teach at the highest level? RAID’s instructor pathway allows qualified divers to progress to:
Decompression Instructor (45m)
Advanced Decompression Instructor (50m Trimix)
Normoxic Decompression Instructor (60m Trimix)
RAID Instructor Crossover
Train directly with Stuart, a RAID Instructor Trainer offering personalised development, professional-level coaching, and elevated assessment standards.
CLOSED CIRCUIT TEC
RAID CCR Tec training introduces divers to closed-circuit rebreathers, offering precision, efficiency, and longer dive times through cutting-edge technology.
INSTRUCTOR DEVELOPMENT
RAID Instructor Training & Crossovers allow experienced professionals to transition seamlessly into RAID’s modern training system.
BOOK A TIME TO TALK
If you need advice and guidance about which path is best for you, book a 30 min FREE strategy call to work out a path for your diving with team.
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