| Re: nose breathing, and overbreathing snorkles
The big deal with a snorkel is the dead space - its huge compared to a loop (or an OC reg)
The entire length of the tube is "rebreathed" (without scrubbing!) every time you inhale. If you get "over the edge" on the CO2 retention side, I can see where you'd potentially be in trouble there, because the short, rapid respiration pattern isn't going to evacuate that dead space effectively at all......
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