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On Fri, 31 Mar 1995, Daniel Lloyd wrote: > When I am leading trips in the Carribean we usually do about five dives a > day and are loaded to the brink of deco after about every dive. When > conducting training dives I usually have to make about 5 to 10 extra > ascents on the second and third day for alternate air source, CESA, etc. > This profile is not really compensated for by the tables or computers (not > mine anyway). Here is the question? > Would going back down to make a safety stop be beneficial at all? > 1. In term of decompression that may have been necessary > due to the profile. > 2. In aiding in offgassing in order to reduce N2 loading > for repititive dives. My thoughts. Your tissues are either bubbling or not bubbling. Simplistically maximum ofgassing is accomplished when the pressure gradient is the HIGHEST between the ambient pressure and the tissue pressure. That would be right before you start bubbling! SO, if you are'nt bubbling there is NO reason to go back down. In fact going back down would only reduce gas transport! So what do you do? Use a computer abd use O2 either at your stops or at the surface to offer yourself some safety margin. Next aspect is if you ARE bubbling. Read up on in water decompression. You could cut tables and set your conservatism factor high, but in my experience its easier to use a computer and oxygen. When I am doing non mix cave dives that is what I do. Thankfully I have never been bent. One trip we inadvertently did three 200 foot air dives in one day. After the first dive we used O2 in the van on the way from Talahassee to Branford. I did suffer from extreme fatigue but had NO OTHER symptoms of DCS. I think the fatigue was simply that, fatigue. r.b.
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