SSI CCR Extended Range 45 – Advanced CCR Diving with Trimix

Safely Dive Deeper Using Trimix on Your Rebreather

The SSI CCR Extended Range 45 course takes your closed-circuit rebreather (CCR) diving skills to the next level by introducing trimix gas blends, enabling you to safely dive to depths of 45 metres. This course is ideal for experienced CCR divers ready to explore deeper dive sites, improve safety, and reduce narcosis using helium-based gas mixtures.

Guided by SSI XR CCR instructors, you’ll learn advanced CCR diving techniques, trimix gas management, precise decompression procedures, and enhanced emergency protocols. This training prepares you thoroughly to safely plan and conduct CCR dives into deeper, more challenging environments.

Why Choose CCR Extended Range 45?

Taking the SSI CCR XR 45 course allows you to:

• Safely dive deeper (45 metres) using trimix gases to minimise narcosis and gas density.

• Expand your dive planning capabilities with advanced decompression techniques.

• Enhance your proficiency in operating CCR equipment using Trimix.

• Improve dive safety through extensive scenario-based training and contingency planning.

This course is perfect for CCR divers eager to experience deeper dives with greater clarity, control, and confidence.

Course Structure & Learning Outcomes

Advanced Knowledge Development

You’ll explore topics crucial to deeper CCR diving with Trimix:

• Trimix gas theory, helium effects, and gas density management

• Advanced CCR decompression theory and trimix dive planning

• Oxygen exposure management, gas switching, and bailout strategies

• Emergency procedures for CCR diving with Trimix blends

Practical Diving Skills Development

• Confined Water Training (1 Dive): Refine buoyancy, trim, gas switching, and emergency skills specific to trimix CCR diving.

• Open Water Training (6 Dives, including 2 Trimix dives): Perform progressively deeper CCR dives to 45 metres, mastering gas management, decompression planning, and emergency handling in realistic conditions.

CCR Extended Range 45 – Requirements & Prerequisites

• Minimum Age: 18 years

• Certification Level: SSI CCR XR 40 (or equivalent)

• Certifications: SSI Deep, Nitrox and Extended Range Nitrox

• Minimum Logged Dives: 50 dives recommended

• Medical Clearance: Valid diving medical certificate

Duration & Training Schedule

• Total Dives: 1 confined dive + 6 open water dives (including 2 trimix dives)

• Course Duration: Typically completed over 4-5 days

• Flexible scheduling available

What’s Included in Your Course?

• Expert training from certified SSI XR CCR instructors

• SSI CCR XR 45 certification upon successful completion

• Use of CCR equipment, bailout cylinders, and trimix gas blends

• All diluent and oxygen fills required for training

Not Included in CCR Extended Range 45

• SSI CCR XR 45 digital learning materials (purchased separately)

• Personal dive gear (mask, fins, exposure suits—available to rent)

• CCR unit hire fee (if applicable)

What’s Next After CCR Extended Range 45?

After completing this advanced CCR training, divers often progress to:

• SSI CCR Technical Extended Range 60 – Advanced trimix CCR diving to 60 metres.

• SSI CCR Hypoxic Trimix 100 – Ultimate CCR trimix diving down to 100 metres.

Enhance Your CCR Diving Experience

The SSI CCR Extended Range 45 course enables deeper, safer CCR dives with Trimix, dramatically enhancing your technical diving abilities and underwater experience.

Contact Us to Book your SSI CCR XR 45 course today!