copyright 2014, Tamara Thomsen. All rights reserved.

TDI Advanced Trimix

The TDI Advanced 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 330 FSW.


The classroom portion of this class will review:

  • Risk Identification, Assessment and Management
  • Buddies and Their Purpose
  • Environemnt and Gear Considerations
  • Decompression Planning
  • Gas Management
  • Knowledge and Communication
  • Dive Procedures and Protocols

Open Water Dives

Students will complete four dives with a minimum bottom time of 100 minutes. Two dives will be deeper than 230 FSW. Open water skills will include properly analyzing gas mixtures, demonstrating pre-dive planning, and executing the planned dives within the limits, planning for contingency situations and problems, staged decompression, proper deployment of lift bag and reel, simulated emergency gas sharing, deployment of backup regulator or bail-out SCUBA system, switching and isolating a malfunctioning regulator. Maximum training depths will not exceed 300 FSW.

Course Options

Courses are offered on a regular basis.

Prerequisites and Requirements

Students must have the following for class:

  • TDI Advanced Nitrox or equivalent certification
  • TDI Decompression Procedures or equivalent certification
  • TDI Trimix or equivalent certification
  • Students must be 18 years of age or older
  • Students must have a minimum of 100 logged dives, 25 of which must be deeper than 100 FSW
  • TDI student folder on file
  • Diversions' Student Agreement on file
  • Students must purchase a copy of the TDI Advanced Trimix Diving manual.
  • Please review the technical diving gear list for gear requirements for this course

Course Fees

Please contact us for the most current pricing. Course fees do not include books, gases, or certification card.

Course Availability

Courses are offered on a regular basis and upon request. Please review our calendar and then contact us.

Copyright , Diversions Scuba, LLC. All rights reserved.