Mailing List Archive Mailing List Archive
John- You need to understand that if you are doing things correctly with a single then the 2 scenarios below are mangable. With the first you should have enough air to share. With the second you head to the surface. I you feel that you cannot head to the surface from the depths you are diving, you are better off with doubles than a pony. If you air supply ceases, you ditch your weight belt, keep your reg in your mouth and exhale on the way up. When you run out of air, you should have one more breath left as the PP decreases. This is not rocket science. It is and obvious black and white issue. Jim On 9/9/98 7:42 AM John Brett wrote: ><snip> > >>This seems to make perfect sense to me and I really can't fathom why >>people would want to strap a useless unreachable air source to their >>backs. > >Having never used a pony, I can't say I know for sure, but it seems to be >either: >"What if my buddy runs out of air" >"What if my regulator stops working". > >The first is easily covered with rule #1 - the second is more emotive. >AFAIK, the failure modes for a single-tank + regulator are: >* running out of gas Check your gauges >* blown tank o-ring very rare, but catastrophic >* blown yoke o-ring use DIN >* blown DIN o-ring total loss of gas, but slowly >* 1st stage freeflow caused by poor maintenance/grit > or v. cold water. >* HP hose blown dramatic, but slow loss of gas > prevented by gear maintenance and hose protectors >* LP hose blown faster (but not instant) loss of gas > gear maintenance + hose protectors >* 2nd stage freeflow caused by poor maintenance/grit > or v. cold water. Don't breathe from reg until > under the (cold) water. > >I'm not a regulator tech/engineer, so I've probably missed some, and I >don't have >all the answers on prevention, so I'd be interested in seeing a more complete >list. Anyhow, there do seem to be some failure modes that would require a >bailout - at which point I'm left wondering what's wrong with the buddy. >Ah, violation >of rule #1 again. > >John Brett > >-- >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'.
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]