TDI Trimix

 Looking to expand your depth range? Want to reduce narcosis during deep dives? The TDI Trimix course is your next step! As you take your diving deeper whether it be to spend more time on an awesome wreck or explore that cave system one of the major limiting factors is gas narcosis. This course shows you how to minimize the effects of narcosis by adding helium to offset the nitrogen in your breathing mixture.

Once completed you will be able to plan and execute dives to a max depth of 60 metres using as little as 18% oxygen in your mix.


 MG 0042

During the course you will learn-

  • Advanced decompression planning including
    • Gas planning based on equivalent narcotic depths, nitrogen and helium absorption and elimination, CNS and OTU limits, isobaric counter diffusion and gas volume requirements
    • Decompression gas choices
    • Tables vs Dive computers
    • Emergency and contingency planning
  • Decompression diving procedures
    • Equipment considerations
    • Pre-dive checks and drills
    • Stress analysis and mitigation
    • Gas switching
    • Following a decompression schedule
    • Team awareness and communication
    • SMB/Lift bag deployment
  • Proper trim, buoyancy and finning techniques
  • Management of multiple decompression stage cylinders
  • Emergency procedures

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Course prerequsites-

  • Minimum age 18
  • Proof of TDI Advanced Nitrox and Decompression Procedures certification or equivalent
  • Proof of 100 logged dives

This course takes 4/5 days and costs £950 this includes-

  • Any equipment required
  • Gases
  • TDI Trimix manual
  • Certification
  • Entrance to Wraysbury Dive Centre

Call us today on 01784 488007 to begin your deep diving adventure