TDI Trimix Diver

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The TDI Trimix course provides the training required to competently and safely utilize breathing gases containing helium for dives that require staged decompression, utilizing nitrox and / or oxygen mixtures during decompression to a maximum depth of 60 metres. The objective of this course is to train divers in the benefits, hazards and proper procedures of utilizing custom oxygen / helium / nitrogen mixtures as breathing gases.

Please understand this price reflects exclusive access to the boat for the course and you need to be prepared to be flexible as the weather and current must be ideal for these dives. The need to reschedule due to weather is common.

PRE-REQUISITES

Minimum age 18
Certified as a TDI Advanced Nitrox Diver and TDI Decompression Procedures Diver, or equivalents
Provide proof of a minimum of 100 logged dives, of which 25 must be deeper than 30 metres
The price does not include trimix / deco fills (budget ~$400 for the course)

WHAT'S INVOLVED?

Advanced decompression dive planning including:
- Gas planning based on equivalent narcotic depths, nitrogen and helium absorption and elimination, CNS and OUT limits, Isobaric Counter diffusion, volume requirements, etc.
- Decompression gas choices
- Tables vs. personal dive computers
- Emergency and contingency planning (equipment failure, omitted decompression, etc)
Decompression diving procedures
- Equipment selection
- Pre-dive checks and drills
- Stress analysis and mitigation
- Following a decompression schedule
- Gas switching
- Team awareness and communication
- SMB/lift bag deployment
Proper trim, buoyancy and finning techniques
Management of multiple decompression/stage cylinders
Emergency procedures (equipment failures, catastrophic gas loss, omitted decompression, navigational errors, injured/unconscious diver, etc)
Equipment considerations, cylinder labeling, analyzing trimix nitrox and mixes, and gas blending procedures