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G. Irvine wrote: > > This is all nonsense - "travelling" is a joke for two reasons: one, it > is an unnecessary conplication and opens you up to added risk, like > dropping too far on the gas while dealing with another problem, not > knowing if yoiu primary euipment is funcitoning, like the wings, > foprgetting top turn off and park the deco reg, making it a liability, > etc, etc, and the other is that you do not get the immediate befit of > the gas being breathed for up to two minutes, so are effectively diving > beyond the clarity level of the gas. In a cave, it is diffeernet since > yo stop and make the switch , leaving the bottle. > BINGO George, it is different in a cave. Some of us are just ocean divers, and must deal with more dynamic water conditions (and weather conditions) from the start. So the gas choices, configurations, and techniques must sometimes therefore be more complicated, right from the start. They are a necessity. > Another thing is that incurring a huge deco liabiltiy in the ocean is > nuts. Use the 40's for safety of streamlining and simplicity, and for > the lesser buoyancy effect on your total package. This sounds to me like "be streamlined and simple and forsake the reason your going in the water in the first place." To safely get to a certain depth and stay there for a reasonable time to do something you feel is important in the ocean means carrying more than 40 cu ft of deco gas, and decompressing on hyperoxic nitrox so as to reduce the time in water. > > Personllya, I think only a total stroke would use 80/20, but we will > not go into that since it is part of the silliness you all get taught, > along with "travel mixes" and deco fear. The fact is, tough guys, you > can deco on most trimixes without any deco gas better than air on air, > but then why am I not suprosed that none of you know this? Ocean dives were impossible on air with air deco not only from narcosis and ox tox perspectives, but also the fact that you would be in the water too long. I have seen all the tables that the Norwegians use to dive the Blucher (330 fsw) and if a diver had to use the bottom mix for deco they'd be a fish by the time they were done with deco. > The trick to really having fun with this and being good at it is to > simplify you rig and get rid of the crap, including the crap you learned > from the tech agencies. George: The trick to really having fun at this and being good at it is to know the conditions under which you will be diving, plan your dive, dive your plan and come back to the atmosphere alive and well and having accomplished what you wanted to do. Sometimes the trick is not to go on the dive. For some of us, all this takes place in the ocean, unless you can tell us of some sunken ocean liners or armoured cruisers that are in the caves. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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