> Rich, a SIS Lunar is not exactly the same as diving with > deco on your back. If you dove with doubles full of nitrox > for a deep wreck penetration, you would simply be a blithering > idiot. Using a SIS which lets you bottom dive and deco on the > same machine is not what we are arguing about here. Pleazse > make the distiction. I wasn't talking about the 'breather. When doing OC trimix, my deco gas wasd on my back (so was my bottom mix, but that's a separate issue). During our first trimix dives, we had doubles with nitrox, and a single of trimix. That worked fine - the only reason I ended up switching to my present OC system is that I could fit more gas in a better-balanced package. Rich
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