RAID CCR Deco Limited Trimix Diver (45M)

Begin your trimix journey with personal guidance from a RAID CCR Instructor Trainer & Examiner.

Instant access to your online learning, course preparation modules. Begin training immediately.

Why Choose the RAID CCR Deco Limited Trimix Diver Course?

This course is the essential transition between no-decompression CCR diving and the full technical CCR pathway. It enables divers to safely conduct:

  • Decompression CCR dives to 40m using Air or Nitrox, and

  • Limited Trimix CCR dives to 45m,

  • With a maximum of 10 minutes mandatory decompression.

IIt is also the only CCR course that introduces staged decompression while maintaining a streamlined, low-complexity profile.

Key Benefits

  • Extend your diving range from 40m → 45m

  • Learn planned CCR decompression with controlled procedures

  • Get early exposure to trimix without the complexity of normoxic or hypoxic levels

  • Build confidence with bailout strategies

  • Strengthen buoyancy, trim, and loop control under realistic decompression conditions

  • A perfect stepping stone into CCR Normoxic Trimix (60M)

What You’ll Learn in the RAID CCR Deco Diver 40M Course

You will develop the skills and discipline needed to execute short, controlled decompression dives on your CCR, using both Air/Nitrox and Limited Trimix as breathing gases.

  • Planning and executing mandatory decompression dives

  • PO₂ management at depth (setpoint ≤1.3 bar)

  • Diluent selection for both Air/Nitrox and Limited Trimix

  • Executing decompression schedules safely and efficiently

  • Handling bailout emergencies with staged decompression

  • Managing max 10-minute decompression obligations

  • Unit-specific configuration and skill mastery

  • Gas analysis and depth planning (EAD/END limits)

RAID CCR Deco Limited Trimix Diver: Course at a Glance

  • Max Depth (Air/Nitrox): 40 metres (130 feet)

  • Max Depth (Limited Trimix): 45 metres (145 feet)

  • Maximum Mandatory Decompression: 10 minutes

  • Bailout PO₂ Limit: ≤ 1.6 bar

  • Max Decompression Obligation: 10 minutes

  • Unit-Specific: Training completed on your exact CCR model

CCR Deco Diver 40M Course Prerequisites

For Open Circuit Divers With No CCR Certification, to enrol in this course, you must

  • Be 18 years or older

  • Be certified as RAID Deco 40 / Decompression Diver (or equivalent)

  • Have logged 30 open-water dives

  • At least 25 hours underwater

  • At least 5 dives ≥30m / 100ft

  • If using a sidemount CCR: RAID Sidemount Diver required

  • Complete all RAID registration, documentation, and medical requirements

Mastering the Core CCR Decompression Skills

This course blends online learning, confined water development, and realistic open-water decompression dives.

Step 1: Online Learning

For Open Circuit Divers With No CCR Certification, to enrol in this course, you must

  • Decompression theory fundamentals

  • Gas selection for 40m Air/Nitrox and 45m Limited Trimix

  • PO₂ exposure management

  • Emergency bailout sequencing

  • Buoyancy, trim, and stress control during decompression

  • Loop mechanics and CCR physics

  • Introduction to staged deco planning

Step 2: In-Water Skills

At least 1 confined-water dive (60 minutes minimum

  • Loop control under task load

  • PO₂ management drills

  • Diluent flushes

  • Manual O₂ addition

  • Bailout procedures

  • Skill stability in neutral trim

  • Simulated decompression ascent protocols

Step 3: Open Water Dives

Required training:

  • Minimum 8 in-water sessions

  • 480 minutes total underwater time

  • 6 open-water dives, with 360 minutes underwater

Depth & progression requirements:

  • At least two dives ≥27m / 90ft

  • Deco exposures must remain ≤ 10 minutes

  • Trimix dives may reach 45m / 145ft

  • Max of 3 sessions per day

  • Max of 2 deco dives per day if deco is required

Instant access to your online learning, course preparation modules. Begin training immediately.

Certification Limits

Conduct CCR decompression dives to:

  • 40m using Air/Nitrox, and

  • 45m using Limited Trimix

Operational Protocols

Operate within these safety limits:

  • Max loop PO₂: 1.3 bar planned

  • Absolute loop PO₂: ≤1.3 bar (≤6m for ≤2 min)

  • Bailout PO₂: ≤1.6 bar

  • Diluent O₂ content: ≥21% for Air/Nitrox 40m

  • Diluent O₂ content: ≥20% for Limited Trimix 45m

  • Maximum decompression: 10 minutes

  • Maximum END/EAD: 30m / 100ft

Pathway to Further CCR Training

This course leads directly into:

  • CCR Normoxic Trimix Diver (60M)

  • CCR Hypoxic Trimix Diver (100M)

  • Advanced decompression programs

IIt is the natural progression point between recreational CCR and full technical CCR depth ranges.

Why Train With Stuart Girdler?

Your CCR training is personally delivered by Stuart Girdler, a RAID CCR Trainer & Examiner with extensive multi-unit experience.

Stuart’s teaching philosophy prioritizes unit-specific competence, bailout mastery, and real-world preparedness, ensuring you leave this course confident, capable, and ready to dive safely within the full 40M limits of your rebreather.

  • RAID CCR Trainer & Examiner

  • Multi-unit qualified instructor

  • Focused 3:1 maximum student ratio

  • Deep technical experience

  • Passionate dive-leadership

  • Over 30 years of diving experience

How to Begin Your CCR Training

You’re now ready to begin your journey into silent, efficient rebreather diving.

Ready to begin your unit-specific training?

Instant access to your online learning, course preparation modules. Begin training immediately.

OPEN CIRCUIT TEC

RAID OC Tec courses focus on advanced open-circuit diving skills, including gas planning, decompression, and deep diving techniques for extended range exploration.

CLOSED CIRCUIT TEC

RAID CCR Tec training introduces divers to closed-circuit rebreathers, offering precision, efficiency, and longer dive times through cutting-edge technology

EXPLORE CCR TEC

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