Quote: (Originally Posted by Richard Lundgren)
Thank you all for providing answers to my question thus helping me understand the situation better.
Final question:
Its seams like there are many different ways/views regarding how much bailout gas really is needed when diving CCR. Would a common and accepted standard be useful? Would this improve the overall safety?
I guess we all have encountered CCR divers diving to rather considerable depth without any bailout or inadequate amounts.
Richard,
I have tried to get a number of bottom divers on
Sydney Project expedition dives to sync their gases ... No luck. For me as dive supervisor, the logistics of having up to 8 people in the water on a 135msw dive, with each team using their own mixes, deco software, deco model, tanks, is becoming a problem. The ocean conditions can change rather quickly down here (on one occasion we had the bottom divers go down in duck pond conditions,. When we picked them out of the water 4.5h later, we had 3..4m waves!)
Unfortunately, the truth is that the deco model, software, gas mixes etc are very personal choices. So the rules we have as a club, dictate:
- team bailout with 1.5 x the gas needed for OC bailout to 21m (where the support guys can deliver EAN50)
- EAN50 and 100 staged on deco station, plus backup deco station and EAN50 + 100 for divers that get separated
- extra gas available in the boat, delivered via support divers
We also have rules around setpoints, max ppO2, airbreaks, ...
You can check out our procedures on our
website (Though I am in the process of re-writing some of them at the moment).
IMPORTANT DISCLAIMER: Our rules have worked for us so far (touch wood). That does not mean they are suitable for your diving. Please do not use these rules other than for educational purposes. I myself have never been deeper than 80msw (back in my OC days), and have yet to finish my Inspiration TMX course. So I am NOT an authority in any way, shape or form.