Course prerequisites:

• Minimum age 18
• Minimum certification of TDI Extended Range or Trimix Diver or equivalent
• Show proof of 100 logged dives, 25 must be deeper than 30metres/100feet

What you can expect to learn:

Advanced decompression dive planning including:

• Gas planning based on equivalent narcotic depths, nitrogen and helium absorption and elimination, CNS and OTU limits, isobaric counter diffusion, volume requirements, etc.
• Use of hypoxic gasses
• HPNS and isobaric counter diffusion
• 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 fining techniques
• Management of multiple (minimum of 3) 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

What’s in it for you?

Ability to conduct technical diving activities using custom trimix mixtures without direct supervision, so long as the following limits are adhered to:

• The diving activities approximate those of training
• The areas of activities approximate those of training
• Environmental conditions approximate those of training