Quote:
| Originally Posted by And Well, thats not quite true. Rather than using the scrubber to thirds, Stuart is using Diluent to thirds. I'm not sure I would be happy with that, but if you have sufficient OC bailout, then it is a similar logic to WKPP and a single RB80 I guess, although I think they do use thirds on the scrubber, judging by the bottom times, and have alternatives for deco, as Stuart suggested.
Andy |
Point taken. I was refering to thirds on the scrubber. My point is that if you are really going to take advantage of the RB, you will have to carry a sh1t load of OC as bailout, or a second RB. Thinking of some of the long dives at 70m or 90m (or deeper) here. Agree that dil usage can be a lot higher in caves, but you can still get an awful long way on a 12 of dil, even if you decide to work on thirds. Scrubber duration is the limiting factor, not dil (or O2), so as Stuart says, the dive should be planned according to this. When we were discussing this, and I asked about extending the duration of a scrubber, the response was "how likely are you to need more than 3 hours heading in?" You can take spare sof with you to recharge the scrubber on the other side of the sump (thinking of cavers here, so the sole aim is to pass the sump and go caving on the other side), and have OC or even a spare rebreather staged / brought in for the deco on the way out.
To be honest, the thing with this sort of diving is getting your head around it. I'm pretty sure I never will, so for now I'll stick with my squalid little sumps and a pair of threes.
Marcus