MIXED GAS CLOSED CIRCUIT REBREATHER DIVER
This is the intermediate level certification course for divers wishing to utilize a closed circuit rebreather (CCR) for mixed gas diving.
The objective of the course is to train divers in the benefits, hazards and proper procedures for mixed gas diving on the unit specific CCR, utilizing a mixed gas diluent containing 16 percent or greater oxygen, and to develop intermediate CCR diving skills appropriate to technical diving to a maximum depth of 60 metres.
1. Minimum age 18
2. Provide a verified log of a minimum of 50 rebreather hours distributed over a minimum of 50 dives on the specific rebreather; 50 percent deeper than 20 metres / 66 feet. All must be deeper than 9 metres / 20 feet.If the diver has 50 hours on another CCR unit recognized by TDI, only 25 hours are required to be on the specific unit
3. Have completed and qualified the TDI Air Diluent Decompression Procedures Rebreather course or equivalent from agencies recognized by TDI
Course Structure and Duration
Open Water Execution
1. Minimum of 360 minutes open water training to be completed over a minimum of 6 dives including 1 equipment configuration and drills practice air diluent dive to a maximum 40 metres / 130 feet
2. All subsequent dives to build incrementally in no greater than 10 metres / 33 feet steps
3. Only 1 dive is on air diluent all others are to be mixed gas dives
4. All mixed gas dives are to be deeper than 40 metres / 130 feet, utilizing a mixed gas diluent containing 16 percent or greater oxygen
5. Four dives must be decompression dives
Qualifications of Graduates
Upon successful completion of this course, graduates may engage in technical diving activities utilizing the unit specific CCR to a maximum of 60 metres / 200 feet, utilizing a mixed gas diluent containing 16 percent or greater oxygen.