TDI Mod3 Advanced Mixed Gas

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.

What you learn

Using the latest in technology CCR's maximize your gas supply and provide the optimum breathing gas for any depth by maintaining a constant partial pressure of oxygenn (PPO2). During the dives (minimum of six) you`ll learn all the nesscery skills to conduct CCR dives using hypoxic trimix as a diluent gas to a maximum depth of 100m.

Skills include

- Calculating off-board gas requirements
- Operational planning
- Team Planning
- Emergency procedures
- Removing and replacing off-board gases
- Use of hypoxic diluent mixtures

Qualification gained

Upon successful completion of this course, graduates may engage in technical diving activities utilizing the unit specific CCR to a maximum depth of 100 metres utilizing any mixed gas diluent appropriate to the dive plan.

Pre-requisites

To enrol on this course, you must:
- Be a minimum age of 18 years
- Certified TDI CCR Air Diluent Decompression Procedures diver, or equivalent from agencies recognized by TDI
- Have a verified log of a minimum of 100 hours as a certified CCR diver over a minimum of 100 dives; a minimum of 50 hours and 50 dives must be on the unit specific CCR. Fifty percent of these dives must be deeper than 30 metres / 100 feet All dives to be deeper than 9 metres / 20 feet

Course structure

5-days with 7 dives. 1 dive will be for skill refresher and equipment configuration while the remaining 6 will all be carried out using mixed gas and deeper than 40m. 420 minutes underwater time required for certification.

If the student is already qualified as a TDI Mixed Gas CCR Diver (any unit) or equivalent from agencies recognized by TDI then a minimum of only 240 minutes open water training is required over a minimum of 4 mixed gas decompression dives to build incrementally in no greater than 10 metres / 33 feet steps. Two dives must be deeper than 70 metres/ 230 feet

If the student is also qualified as a TDI Advanced Trimix Diver or equivalent from agencies recognized by TDI then a minimum of only 240 minutes open water training is required over a minimum of 4 mixed gas decompression dives to build incrementally in no greater than 15 metres / 50 feet steps