IndigoBlue
Contributor
Spectre:Karl, you are welcome to cite whatever references you wish to... providing you actually cite the references. It just so happens that one of the incidents I'm referring to has a article written regarding it; which happens to be available online [and in a recent issue of Divers Ocean Planet]. You may note "This was complicated a bit by the fact that since we relinquished our deco bottles, we had no regulator to breath from, as our backgas was a hypoxic 9-10% oxygen." But those involved made no mention of wishing they had snorkels; and went I asked one of the participants this morning just to make sure; their comment was exactly as I stated; bouyancy was necessary, snorkels were not.
Personally I'm more apt to believe the trained divers returning from a 400 ft dive then your naui instructor magazine.
But.. read for yourself and decide. My over-riding feeling wasn't "I should add a snorkel", it was "I'm happy I have an HID light"
http://www.uwex.us/DOPUSSVA.pdf
Jeff you are one of the best divers that I know of, so I would never pretend to tell you what to do. You probably know more than most divers on Scubaboard.
Whether a group of divers on a technical dive with a technical boat each has a snorkel with them or not is not a major issue, in my opinion.
A more significant issue is whether each of the technical divers on the dive has been properly trained to isolate first in the case of a catastrophic gas failure. To teach or drill otherwise is a fallacy. But we have all discussed that issue at great length on your excellent technical board.
For nontechnical dives, I believe all the safety gear is warranted, including a snorkel of some kind, somewhere on the diver. And I believe that is my answer to the original post #1. Folding snorkels, etc., those are all valid resolutions.