SSI Extended Range Trimix

About the activity

Extended Range Open Circuit Diving – Dive Deeper, Dive Smarter

Take your diving beyond recreational limits with our Extended Range Open Circuit Diving course. Designed for experienced divers, this program teaches you the skills, planning, and safety techniques needed to safely explore deeper waters, manage multiple gas mixes, and perform controlled decompression dives.

What You’ll Learn

• Plan and execute deeper dives safely, including staged decompression stops.
• Manage multiple gas mixtures, including nitrox and high-oxygen blends.
• Refine advanced diving techniques, from buoyancy control to equipment handling.
• Improve team coordination and decision-making in technical diving scenarios.

Why Choose This Course

This course is perfect for divers who want to push their limits safely, gain confidence with technical dive planning, and prepare for advanced specialties like trimix or deep wreck exploration. You’ll finish with stronger skills, better control underwater, and the confidence to tackle challenging dive environments.

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What’s Included 

• Elearning for self study 
• Extended Range Trimix Certification upon completition
• Technical diving gear (twinsets, sidemount equipment, regulators, wings, stages)

Not Included

Personal diving gear (mask, fins, suits – available for renting here). 

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Facts And Training Standards

• Amount of Academic Sessions: 5
• Amount of Pool/Confined Water Sessions: 1
• Amount of Open Water Sessions: 6
• Maximum Training Depth: 45m / 145ft
• Standards

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Certification Prerequisites

• Minimum Age: 18
• Minimum 50 logged dives
• Have the following SSI certifications or an equivalent from a recognized training agency: Deep Diving and Enriched Air Nitrox 40
• Medical Fit (PDF) 

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FAQ

What does ‘Medical Fit’ mean?

If you answered YES* to questions 3, 5 or 10 above OR to any of the questions on page 2 you need written medical approval from your doctor to be able to join the activity. Take all three pages of the medical form (Participant Questionnaire and the Physician’s Evaluation Form) to your physician for a medical evaluation.

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Guidance for Doctor (PDF)