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Cyrille · April 26th, 2008, 08:35 AM

Quote: (Originally Posted by Howard Payne)

What is more worrying is the huge drop in FO2 in the loop at shallow depths.

Personally I think a rebreather with the ability to have such a marked swing in O2 content - even without all the usual electronic considerations - really should have some sort of PPO2 monitoring?

The conclusion that we drew after a few dives was that I would happily buddy up with someone on an RB80 for a Trimix or any other dive and that as the ultimate progression of the GUE / DIR system - it is not without significant complication and extra task loading - but at the same time - entirely compatible with the rest of DIR diving as a holistic system

Hi Howard,

My instructor had a shallow water black-out when diving the RON last year... and all of this despite the fact that he is a very experienced GUE tech diver... He had to be ressucitated and taken to the hospital. Fortunately he survived the ordeal.

I have difficulties to understand why having a ppO2 meter would not be DIR...

If we follow this logic, then we should not use SPG's to read the pressure from our cylinders, should we?

If someone would dive a pure oxygen rebreather at max. 6m, I would understand that a ppO2 meter is not needed. But for SCR/CCR diving this is another story, especially during the ascent when reaching shallow waters.

I believe that buddy pairs must be consistent when it comes to decompression diving:
- either 2 divers using rebreathers
- or 2 divers on OC

Else, not having the same decompression schema, one may not be able to help the other in case of emergency.

Kind regards.

Cyrille

April 26th, 2008, 08:35 AM	#4 (permalink)
Cyrille(Offline) New Member Join Date: Apr 2006 Location: Ijsselstein, The Netherlands Posts: 125	Quote: (Originally Posted by Howard Payne) What is more worrying is the huge drop in FO2 in the loop at shallow depths. Personally I think a rebreather with the ability to have such a marked swing in O2 content - even without all the usual electronic considerations - really should have some sort of PPO2 monitoring? The conclusion that we drew after a few dives was that I would happily buddy up with someone on an RB80 for a Trimix or any other dive and that as the ultimate progression of the GUE / DIR system - it is not without significant complication and extra task loading - but at the same time - entirely compatible with the rest of DIR diving as a holistic system Hi Howard, My instructor had a shallow water black-out when diving the RON last year... and all of this despite the fact that he is a very experienced GUE tech diver... He had to be ressucitated and taken to the hospital. Fortunately he survived the ordeal. I have difficulties to understand why having a ppO2 meter would not be DIR... If we follow this logic, then we should not use SPG's to read the pressure from our cylinders, should we? If someone would dive a pure oxygen rebreather at max. 6m, I would understand that a ppO2 meter is not needed. But for SCR/CCR diving this is another story, especially during the ascent when reaching shallow waters. I believe that buddy pairs must be consistent when it comes to decompression diving: - either 2 divers using rebreathers - or 2 divers on OC Else, not having the same decompression schema, one may not be able to help the other in case of emergency. Kind regards. Cyrille __________________ "Scuba diversdescend to look around themselves, freedivers descend to look within themselves."