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4-5 days - £995      3 days - £795


Includes Instructor's Gas!

DISCOUNTS for two divers or more!

RAID Deco 80/Deco 100 




Course Outline


A course to further extend our depth and decompression obligation, this course will take you to the outer limits of technical diving.

You'll be in the water with at least three stage cylinders for decompression. 

These training programmes comprise of either TDIs Advanced Trimix or the PADI Tec 65 trimix course with RAIDs course still under development, but the word is that you'll be able to gain an 80m qualification half way through, watch this space!

Knowledge Development

Your knowledge at this level should be rock solid, you may have recently racked up your required experience before coming on the course or perhaps it's been a long time. You will given a manual for you to work through and complete your knowledge reviews with regular teach-ins as the course progresses. We'll refresh you whatever the case with the main emphasis on dive planning and use of hypoxic gas mixes and isobaric counter diffusion.


  • Be a qualified normoxic trimix diver from any agency.

  • Have the necessary dives/experience.

  • Hold an in date first aid certificate (we can help with this too!)


Course duration & cost

We will use an astonishing amount of helium, price includes your instructor's gas!  

RAID Deco 80 - 2-3 days £795

RAID Deco 100 (Incorporating Deco 80) - £995

PADI (90m) - 3 days - £795

TDI (100m) - 4-5 days - £995 

Extra day - £200 

What is included?

Helium is a variable here & the price you see is the price you pay with no hidden extras apart from your own gas obligation.  

  • Course materials.

  • Decompression stage cylinder & regulator rental.

  • Certification Fee.

  • Instructor's Gas!

What is not included?

You’ll be responsible for all your own gas fills. Travel to and from the training locations and open water sites are your responsibility, if the course culminates at NDAC Chepstow there is an entry fee payable directly to the centre. If you wish to complete your course in warmer climes, call us. You will be required to have your own drysuit for the course and any further equipment you require, we can hire this to you at a reasonable cost, including a fully rigged twinset complete with backplate, harness wing and tec regs!


What’s next?

Congratulations! You are an Advanced Trimix diver, one of very few, if you've not thought about investing in your own rebreather perhaps the price of helium has swayed your decision.

Enjoy your diving adventures and dive safe!

Get Involved

Morriston Leisure Centre, Swansea

07515 878 378

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