CCR Cave Diving Training in EU - Where?

lizardland · 26th September 2006, 19:31

Quote:

For the record, I have to absolutely disagree. Anyone who thinks they need the same bail out and deco gas for a failure several kilometers into a cave at say -80m as they would for an open water dive to -80m will not survive a faulure in the cave.

Hi John,

I think most people who are diving mix are thinking in terms of "time to surface". The same mindset applies underground as in open water. I think most people who dive trimix have the sense to work out their gas volumes on how long the swim to the surface is.

Quote:

CCR gas management in caves is more complex than O/C there is no question of this, on O/C you [normally] turn at 3rds or before, it's easy. on CCR you either make a judgement call and "estimate" how much gas you [ or your team ] need to get out using your O/C experience, or do what many CCR cave divers seem to do and carry enough O/C gas to achieve the entire dive on O/C, but breathe the rebreather.

Knowing where to turn is definitely harder on CCR than on OC. I plan my dives around what bailout I have available and that tends to be fairly conservative as I generally round my depths deeper and my RMV higher. I generally turn either on elapsed time based on my bailout's endurance or 1/3 of dil gone, whichever is soonest.

Quote:

Question: if you don't have O/C experience in a cave, how do you know how much O/C gas you need to bail out?

I agree. Like I said originally, when you go to bailout then you become an OC cave diver.

26th September 2006, 19:31	#31 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,234	Re: CCR Cave Diving Training in EU - Where? Quote: For the record, I have to absolutely disagree. Anyone who thinks they need the same bail out and deco gas for a failure several kilometers into a cave at say -80m as they would for an open water dive to -80m will not survive a faulure in the cave. Hi John, I think most people who are diving mix are thinking in terms of "time to surface". The same mindset applies underground as in open water. I think most people who dive trimix have the sense to work out their gas volumes on how long the swim to the surface is. Quote: CCR gas management in caves is more complex than O/C there is no question of this, on O/C you [normally] turn at 3rds or before, it's easy. on CCR you either make a judgement call and "estimate" how much gas you [ or your team ] need to get out using your O/C experience, or do what many CCR cave divers seem to do and carry enough O/C gas to achieve the entire dive on O/C, but breathe the rebreather. Knowing where to turn is definitely harder on CCR than on OC. I plan my dives around what bailout I have available and that tends to be fairly conservative as I generally round my depths deeper and my RMV higher. I generally turn either on elapsed time based on my bailout's endurance or 1/3 of dil gone, whichever is soonest. Quote: Question: if you don't have O/C experience in a cave, how do you know how much O/C gas you need to bail out? I agree. Like I said originally, when you go to bailout then you become an OC cave diver. __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
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