Quote: (Originally Posted by Mike)
I disagree actually - the hydrostatic pressure difference created by using a snorkle seems to result in a significantly higher WOB on inhale than a over shoulder lung rebreather. Personally I think that snorkles breath like shit (but the swim really well
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Mike
I am with Mike here. I am quite sure that high WOB can trigger nose-breathing.
I tried this myself on a converted Dolphin (the Dolphin has back mounted CL), just after I got a backplate adaptor. I put the adaptor too close to the Dolphin case, so that there was just barely enough CL-volume. The following dives, I would start to nose breathe 10-15 minutes into the dive. It scared the # out of me until I figured out what was wrong, because I could not control my urge to suck my mask in through my nose :-).
Readjusting the backplate adaptor for more CL volume and thereby lower WOB helped.
On a later dive I experience the problem again after diving with my upper body slightly lower than the lower body (thus the WOB was increased with my back mounted CLs).
Morten