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John- If I look at this in a "likelyhood of failure" point of view, I see the isolator as an item which is very rarely used, but when you need it, it has to be there. If speed of shutdown was such a big issue then why isn't the isolator a ball valve? IMHO, I think that it is best to leave it fully open to avoid it's turning into a potential liability. BTW, you are having one hell of a Virginia Beach, Va. dive if you have 30' of vis! Jim On 3/27/98 11:42 AM John Chluski wrote: >Jim, > >I do not think it would be that significant mainly because my isolator is >fairly +ACI-tight+ACI- and is thus difficult to turn by casual contact. >It is also >canted towards my neck so my head would be the first thing to contact >something solid. Lines are a different matter and perhaps the next para >explains my reasoning on this. > >My experience on wrecks is predominantly limited to S FL where visibility is >usually great (can't recall a wreck dive where vis wasn't at least 30-40') >and entanglement hazards are rather slight. Also most of the wrecks down >here tend to be of the artificial reef variety so much of the interior is >relatively clean. Some exceptions of course. The only entanglements I have >witnessed occur when a diver departs the wreck and is facing backwards to >the direction of travel due to current. Always helps to look where one is >going... Only had to whack my leg on a crows nest once for that lesson to >sink in... > >Regards, John > > > > >+AD4-John- >+AD4- >+AD4-What do you think of the possibility of the isolator being 1/2-1 turn >+AD4-away from being accidentally closed by contact with wreck debri, lines, >+AD4-etc.? >+AD4- >+AD4- Jim >+AD4- > > >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > ------------------------------------------------------------------- Learn About Trimix At http://www.cisatlantic.com/trimix/trimix.html -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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