O2 is added through a kiss valve. I use trimix as diluent to reduce the nitrogen in the loop. It is not like OC diving. I only carry 1 bailout tank seperate from the rebreather.FLTEKDIVER:thanks!! I have a question, how do you "add" your 02 or trimix at depth on converted dolphin to ccr? Is it manual? I would think you have your tri-mix bottle for depth, and your 50/50 mix, or o2 bottle and diluintent for travel/deco?
There is no need to carry travel/deco gasses because the mix can be changed at will to provide the best mix for the current condition. For instance, at 20ft stop I clear the loop of dil by exhaling through my nose then press the o2 add button, viola, instant deco mix.