Some good points made. Joe -Diver, nice use of the manual. It would appear that based on that, my belief about the stamina aspect may be out of line. I fear that the "stamina" portion of the DM evaluation which includes the snorkel swim may have left a false impression with me about the underlying purpose of the swim in OW.
I suppose though that the meat of my question really lies in my feeling that some folks think the snorkel option is inferior to the non-snorkel swim. I see the responses regarding the scenario of someone falling off the boat without their gear, but I'm not sure that that is a SCUBA related issue. It would seem to me that this would be just as likely for anyone on a boat or ferry. I can't imagine everyone having to pass a water skills assessment before getting on their Caribbean cruise, or their uncle's powerboat. But for purposes of this discussion, I don't want to debate the likelihood of this scenario so I will give it up as an example. Are there any others?
Thanks