Trimix CCR diver. 100m unlimited deco. The big ticket for most sport divers achieving exposures that demand high performance. IANTD Full trimix CCR training emphasises the development of sharp personal skills and slick team procedures to provide bailout support and safe ascents.
The primary diver development completed in the step up to Hypoxic Trimix CCR training is the move to entirely team supported or staged diving mentality. This is the level where a self contained / self sustaining approach becomes unmanageable due to the sheer amount of decompression, lengthy runtimes and bailout logistics. At this point decompression becomes a true overhead environment.
Trimix CCR also has a commitment higher than any previous level as gasses are routinely carried that are unbreathable at the surface and shallow depths, mandating a change in safety procedures and gas switch confirmation.