copyright 2014, Tamara Thomsen. All rights reserved.

O2ptima Advanced Mixed Gas Diluent Decompression

This is the highest level certification course for divers wishing to utilize the unit specific closed circuit rebreather (CCR) for advanced mixed gas diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for advanced mixed gas diving on a CCR and to develop advanced CCR diving skills appropriate to technical diving to a maximum depth of 100 metres / 330 feet.


Students in this course will review the following topics:

  • Gas Physiology
  • Formula Work
  • Dive Tables
  • Dive Computers
  • Dive Planning
  • Equipment Maintenance

Open Water Dives

Minimum of 420 minutes open water training to be completed over a minimum of 7 dives including 1 equipment configuration and drills practice air diluent dive to a maximum 40 metres/ 130 feet

Course Options

This course is offered on a regular basis.

Prerequisites and Requirements

Students must have the following for class:

  • Student must be 18 years of age
  • Student must have a minimum of 100 rebreather hours distributed over a minimum of 100 dives. 50 percent of these dives must be deeper than 100 ft.
  • Student must have completed and qualified the TDI Mixed Gas Diluent Decompression Procedures Rebreather course or equivalent.
  • TDI student folder on file
  • Diversions' Student Agreement on file
  • All knowledge reviews completed
  • Student must have a copy of TDI's Diving Rebreathers 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, sorb, 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.