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Dave Story writes: > As Bill Mayne points out, I am talking about taking the final 10' stop > deeper than 10' to avoid troughs "raising" me above 10'. When you are > using a computer, there is nothing wrong with hanging deeper than the > required stop. > > In fact, it is one of the best things about deco on a computer: since > hanging deeper reduces the pressure gradient, you are less likely to > bubble. With tables, you cannot hang much below the indicated depth > because (most) tables do not take the slowed offgassing into account. I don't think anything I said disagrees with this. I think my tone was too strong, for which I apologise. I think what I should have done is asked the following questions. Do you plan the whole dive including stop depths and times before you enter the water and then follow it during the dive, or do you make a rough plan and then follow the computer during the dive? Or maybe I should ask, would you be able to complete the deco if your computer failed? Do you carry tables which use the same model as your computer and would you know how to enter them half way through deco? I would be interested in honest answers from other divers as well. Although we use computers I always plan and dive from my tables. I guess I still use a computer as a glorified bottom timer and ascent rate warning device. > Doesn't matter what the deco is, though I rarely go over 30 minutes: > it's too cold, even dry. That and the conditions change rapidly. > > I'm not sure how and why my gas source relates to my ascent rate. If > I have deco stops, I have deco stops. I also have a fixed, > not-to-exceed ascent rate. Why does my gas source matter? By ascent rate I was referring to the time at which your computer allows you to move from stop to stop, not the rate at which you move between stops. The other comment refered to the fact that you may not be carrying enough gas to complete the dive. Therefore you have to get to your stage bottle. If it is hanging at 10' then you rise to 10'. > Yes, doing a dive like this requires foresight and planning, as well > as fortitude, but what does this have to do with how to perform a 3m hang? I got side tracked. Alan
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