SSI Technical Extended Range Trimix

About the activity

Technical Extended Range Trimix

Explore the depths with our Technical Extended Range Trimix course, designed for experienced divers ready to safely perform mixed-gas decompression dives. Learn how to plan deep dives using trimix, manage multiple gas switches, and handle complex dive scenarios with precision.

What You’ll Learn

• Plan and execute deep trimix dives with staged decompression.
• Manage multiple gas mixes, redundancy systems, and emergency procedures.
• Improve situational awareness, teamwork, and problem-solving underwater.
• Gain practical experience with advanced technical diving equipment.

Why Choose This Course

This course equips divers with the skills and confidence to perform deep mixed-gas dives safely. It’s a critical step for anyone serious about technical diving and exploring demanding underwater environments.

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What’s Included 

• Elearning for self study 
• Technical 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: 2
• Amount of Pool/Confined Water Sessions: 1
• Amount of Open Water Sessions: 6
• Maximum Training Depth: 60m / 195ft
• Standards

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Certification Prerequisites

• Minimum Age: 18
• Have logged at least: 70 total dives, 20 dives deeper than 30 meters, 10 dives requiring staged decompression with at least one (1) gas switch (not including training dives).
• Have at least one (1) of the following SSI certifications or an equivalent from a recognized training agency: Extended Range, Full Cave Diving, Technical Wreck Diving
• 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)