Mailing List Archive Mailing List Archive
interesting to note first, i am not aware of any wreck diver being executed in recent times on the US east coast. Several self assisted suicides, but no state sponsored killings. second, what exactly is the DIR rule for gas management? I have seen extensive reference by Mr. Irvine to stages and to not relying on traditional thirds for backgas.The concept seems to be stages to like 200psi and the backgas as a reserve, w/o calculation.. I see that GUE prefers sixths for cave1. That would seem to be a short dive on most reasonably sized single tanks<please no heiser cylinders> Perhaps further clarification is in order. Marv RDecker388@ao*.co* wrote: > In a message dated 7/6/01 4:01:30 PM Eastern Daylight Time, > cobber@ci*.co* writes: > >> IMHO, if you are not diving doubles then you should not be getting in >> virtual or real overhead conditions (i.e. caves, wrecks or deco) so you >> might as well be a rec diver. Being a rec diver means being able to head to >> the surface under any emergency condition. Your failure mode for most if > > not > >> all issues is a controlled ascent to the surface. >> >> Other than that you are fooling yourself using H, Y or whatever systems. If >> anything it could make matter worse by introducing CF factors into a simple >> rec rig. >> >> My reasoning on this is to have enough gas to deal with a problem on the >> bottom even after isolating the valve with the problem, impossible to do >> with a H or Y valve. >> >> Doubles vs. Singles is more an issue of convenience and logistics. You > > can't > >> make a silk purse out of a sows ear so if your gonna do it, do it right. >> Don't overhead dive without doubles. > > > > BS! "Doing it right" means only dragging along that equipment necessary for > the dive at hand. If the dive can be executed using a single tank, staying > with the proper rules of gas management, then flying doubles would be "doing > it wrong." > > The cave diving community has long used dual outlet valves on single tanks > for "Intro" level cave and cavern dives with great success. Most likely > thousands and likely more accurately tens of thousands of wreck divers are > executed along the US East Coast using single tanks equipped with dual outlet > valves each year. > > With practice it takes but a few seconds to isolate a free-flowing regulator > using a H valve. The amount of gas lost in such situations should be > insignificant assuming proper gas management techniques are being applied. > In a worst case scenario the teamate's (buddy's) reserve gas supply serves to > provide the required redundancy. > > What's next, an endorsement for carrying bail-out bottles diving single tanks? > > Bob D. > www.SportDiverHQ.com > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. > > -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
Navigate by Author:
[Previous]
[Next]
[Author Search Index]
Navigate by Subject:
[Previous]
[Next]
[Subject Search Index]
[Send Reply] [Send Message with New Topic]
[Search Selection] [Mailing List Home] [Home]