Rebreather World - View Single Post - Maybe eCCR's really aren't the wave of the future for recreational divers?

silent running · 9th June 2007, 10:39

Quote: (Originally Posted by Dave Sutton)

Time for a reality check: PP02's do not "wander all over the place" on a mCCR, certainly not enough to add any deco. MANY THOUSANDS of mCCR dives have been done with non-integrated deco computers and/or cut tables. The normal deviations from "average desired PP02" (as there is no "setpoint") are *completely* irrelevent to deco obligations, and in fact average themselves out quite nicely over the time base of a dive. I'll be happy to show my VR-3 PP02 logs if I can ever figure out how to extract them from the damned thing.... maybe I'll just take some photos of the screen. Dave

Dave, I thought it was clear from the context of my statement that I was talking about the MCCR SP wandering all over the place during a stressful dive, since I mentioned that most of my dives have periods of high stress-strong currents, unfamiliar exploratory dive sites...

I don't doubt that plenty of sucessful dives have been done with MCCRs without inline PO2 monitoring/realtime deco calc. Never said otherwise. My point was related to Mark's experience and my own observation diving with buddies on KISSes and KISSed Dolphins in those stressful conditions. Nor do I doubt that MCCRs can be set up properly/flow biased for high task loading, high exertion dives. But I like my SP only HUD ECCR and it's real time flexability in handling both periods of high exertion/task loading and the periods where I duck out of the current, lay perfectly still and watch the show...and my PO2 of course.

9th June 2007, 10:39	#73 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,873	Re: Maybe eCCR's really aren't the wave of the future? Quote: (Originally Posted by Dave Sutton) Time for a reality check: PP02's do not "wander all over the place" on a mCCR, certainly not enough to add any deco. MANY THOUSANDS of mCCR dives have been done with non-integrated deco computers and/or cut tables. The normal deviations from "average desired PP02" (as there is no "setpoint") are completely irrelevent to deco obligations, and in fact average themselves out quite nicely over the time base of a dive. I'll be happy to show my VR-3 PP02 logs if I can ever figure out how to extract them from the damned thing.... maybe I'll just take some photos of the screen. Dave Dave, I thought it was clear from the context of my statement that I was talking about the MCCR SP wandering all over the place during a stressful dive, since I mentioned that most of my dives have periods of high stress-strong currents, unfamiliar exploratory dive sites... I don't doubt that plenty of sucessful dives have been done with MCCRs without inline PO2 monitoring/realtime deco calc. Never said otherwise. My point was related to Mark's experience and my own observation diving with buddies on KISSes and KISSed Dolphins in those stressful conditions. Nor do I doubt that MCCRs can be set up properly/flow biased for high task loading, high exertion dives. But I like my SP only HUD ECCR and it's real time flexability in handling both periods of high exertion/task loading and the periods where I duck out of the current, lay perfectly still and watch the show...and my PO2 of course.
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