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  • Tri-Mix Course

Tri-Mix Course

Minimum certification level of Advanced Nitrox & Decompression Procedures (or equivalent), 18 years old or older, 100 logged dives.

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  • 18 years old or older
  • 100 logged dives
  • Minimum certification level of Advanced Nitrox & Decompression Procedures (or equivalent)
Required Equipment:
  • Twin cylinder setup with isolation manifold & bands (min. 2 sets, preferably 3)
  • Two high performance cold-water ready regulators
  • Two Decompression mix cylinder(s) with complete regulator/gauge setups
  • Drysuit Inflation cylinder with 1st stage, drysuit hose, OPV valve, & gauge
  • Depth gauge & automatic bottom timer (or computer)
  • Backup depth gauge/bottom timer (or computer)
  • Exposure suit adequate for the local environment (drysuit)
  • Lift bag/SMB and spool/reel (minimum 50 lb. lift bag)
  • Wings/backplate/harness adequate for equipment configuration
  • Primary Light
  • Backup Light(s)
  • Cutting tools
  • Access to O2 & He analyzer
  • Underwater slate w/writing utensil

Note: Cylinders and regulators need to be properly cleaned and labeled as ready for oxygen service.
Course Requirements:
  • Classroom & briefings = 8 hours
  • Satisfactorily complete the TDI Trimix Exam
  • All bottom mixes must have 18% or higher oxygen
  • Minimum 4 open water dives (provided all skills have been mastered)
  • Minimum 100 minutes bottom time, with no training dive deeper than 200 feet
  • Demonstrate sound, mature judgement concerning dive planning & execution

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