copyright 2014, Tamara Thomsen. All rights reserved.

O2ptima Air Diluent Decompression

This is the second level certification course for divers wishing to utilize a closed circuit rebreather (CCR) for air diving. The objective of the course is to train divers in the benefits, hazards and proper procedures for diving a CCR and to develop basic CCR diving skills to a maximum depth of 45 metres / 150 feet using an air diluent for formal decompression diving.


Students in this course will review the following topics:

  • History and Evolution of Rebreathers
  • Rebreather Practical Mechanics
  • Gas Physiology
  • Proper Scrubber Packing
  • Electronic or Manual Systems Design and Maintenance
  • Dive Tables
  • Dive Computers
  • Dive Planning
  • Emergency Procedures

Open Water Dives

Students will complete a inimum of 420 minutes open water training to be completed over a minimum of 7 dives with a gradual increase in depth each day to a maximum of 30 metres / 100 feet

Course Options

This course is offered on a regular basis and can be combined with the TDI Nitrox Diver course.

Prerequisites and Requirements

Students must have the following for class:

  • Student must be 18 years of age
  • Student must have 50 logged dives
  • Student must be a TDI Advanced Nitrox Diver and Deco Procedures Diver or equivalent
  • OR
  • Minimum age 18
  • TDI Air Diluent CCR Diver certified or equivalent
  • 30 hours on the CCR unit
  • Six months CCR diving experience
  • 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
  • Student must also have copies of TDI's Advanced Nitrox and Decompression Procedures manuals
  • 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.