| On the whole loop thing.
Remember the KISS is a MCCR so doesn't adjust it's addition of O2 automatically. If I am working hard on the surface, I can feel the loop getting tighter as it shrinks, due to me metabolising the O2. Not a problem I just touch the O2 add button to top it up.
At 6m, breathing pure O2, the only way the ppO2 can change is if the percentage of O2 in the loop changes. And the only way it can do this is if inerts are off-gassed into the loop.
This will be picked up by the cells (assuming they are working of course).
The bouyancy idea is a nice idea, but I personally find it much harder to control bouyancy on the rebreather than open circuit, despite not much OC diving these days. Although I'm told others find it easier to control their bouyancy on a rebreather than OC.
Janos
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