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On Thu, 21 Jul 1994, Terry McCracken wrote: > Is it a possibility to leave this all on the surface? Say four divers > go out, two stay on the surface along with all the tanks and a gas managment > console and the two divers use a full-face (AGA, Kirby-morgan) mask with > communication gear go down on surface supply. This means that the gas > decisions are made by a person on the surface that is not task loaded and not > narced.It also means the guys on the surface always know what is happening. > Then they swap. > I know this is not cheap but how does it compare to the current costs > and the suggested costs of rebreathers.(plus the cost of mistakes)We are only > adding the surface supply hose and the console and comms. The tech diving > comunity is adopting commercial gas mixes, why do we not also adopt their > safety practises. Your not alone in suggesting that tech divers move towards surface-supplied breathing gas. I would suggest that it's not feasible for many applications (caves, wreck penetrations, etc.). I've given it serious consideration, and I feel that the costs (not only $$, but efficiency of operation allowable only through total autonamy, as well as additional risks) outweigh the benefits for me & what I do. However, I think you're right - it probably does have broader applications in tech. diving operations than it's presently used for. I suspect it's just unfamiliar technology to many. Aloha, Rich deepreef@bi*.bi*.ha*.or*
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