Technical Diver Career Pathway – Tec 40 to Trimix 90
Delivered by Ed Bosworth (Professional Diver Training) in partnership with Go2Similan Diving, Khao Lak
12 Days • 3 Confined Sessions • 9 Open Water Dives • 5 Intermediate-Depth Dives • 4 Deco Shipwreck Dives
Price: 60,000 THB
Training Highlights
Equipment Mastery
You will build full familiarity with:
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Twin-set/backmount or sidemount configuration
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Stage and decompression cylinders
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Multi-gas switching procedures
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Gas mixes including 100% oxygen
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Redundancy systems, bailout strategies and task-loading management
Safety & Emergency Skills
Confined-water training develops strong foundations in:
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Valve drills and shutdowns
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Handling regulator and bladder failures
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Managing out-of-gas scenarios
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Problem-solving during decompression stops
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Recovering or supporting an unconscious diver
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Managing multiple simultaneous failures
All skills are reinforced later during deep open-water dives.
Progressive Open-Water Training
Across the Tec Deep program you will complete:
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9 open-water technical dives
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5 intermediate-depth training dives
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4 decompression shipwreck dives
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Training dives on deeper Andaman Sea wrecks and reef structures
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Decompression dives using multiple gases and staged cylinders
These dives gradually increase in complexity, depth, and task loading as you move from Tec 40 → Tec 45 → Tec 50.
Why Train in Khao Lak?
Khao Lak offers ideal conditions for multi-level technical training:
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Excellent deep reef structures and drop-offs
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Multiple deep wrecks suitable for progression
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Stable conditions for decompression practice
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High-quality logistical support from Go2Similan Diving
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Professional boat crews familiar with technical operations
Combined with Ed Bosworth’s technical experience, this creates a world-class training environment.
Course Structure (12 Days Total)
Confined-Water Skill Development (3 Sessions)
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Equipment and stage cylinder setup
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Buoyancy, trim and propulsion refinement
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Gas-switching protocols
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Safety drills and repeated emergency exercises
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Team communication and role practice
Open-Water Dives (9 Dives Total)
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5 progressive intermediate-depth dives
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4 decompression shipwreck dives
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Multi-gas ascent training
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Real-world problem-solving at depth
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Final 50 m-level technical qualification dives
Price
Tec Deep Program – 60,000 THB
Includes:
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Full Tec 40 + Tec 45 + Tec 50 instruction (12-day program)
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All in-water training with Ed Bosworth
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Boat fees and logistics via Go2Similan Diving
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Cylinders, stage/deco tanks and weights
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Gas fills (including high-O₂ mixes up to 100%)
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Certification processing for all three levels
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All technical training materials
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Small-group training ratios
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Access to deep wreck sites where conditions allow
Excludes:
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Accommodation in Khao Lak
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Technical dive computer rental (available on request)
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Personal technical diving insurance
Prerequisites
To enrol in the Tec Deep program, you must hold:
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Rescue Diver certification (or equivalent)
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Deep Diver certification (or equivalent)
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Enriched Air Nitrox Diver certification
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Minimum 100 logged dives
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Minimum age: 18 years
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Recent dive medical if required
If you are not yet certified to this level, Ed can advise the best pathway to reach the prerequisites.
Certification Outcome
Upon successful completion, you will be certified to:
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Conduct decompression dives to 50 metres
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Use up to three gases, including 100% oxygen
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Execute complex multi-level technical dives using backmount or sidemount
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Manage real-world technical emergencies
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Prepare confidently for Trimix training
Tec Deep certification represents the highest level of deep air/Nitrox training before entering the world of helium-based diving.
Book the Tec Deep Program
Spaces are limited to maintain the highest instructional quality.
Contact Professional Diver Training or Go2Similan Diving for availability, course dates and equipment requirements.