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Kevin, a 25% O2 would suffice seeing how the bottom is at 150', but I will almost always opt for running something closer to a 1.3 pp of O2 or lower when factors such as cold water and current come in to play. So I would probably run a 23% O2 max. and 20% He.(100' END). This would seem to be the acceptable standard among the well advised! Jeff Kevin Rottner wrote: > Dear list: > > Not a troll, not a trap . . . just a search for opinions. > > One of my favorite wrecks sits on the sand at 143 FSW. She is a Clemsen > Class Destroyer, DD-227, eight miles off shore in the middle of a major > shipping lane. Built in 1919 when everything aboard was made of brass and > bronze. One of the 4 inch guns sits on the sand at 149 FSW. Water is cold, > Southern CA cold, between 49 and 66 degrees F. Strong current only seems to > run through the area AFTER we get on the wreck. Great dive, but . . . . > > The few who dive her, do it on air and I have dove her on air, and lately > have been using EAN 25 or EAN 26. But I am beginning to rethink this. > > What gas would you use ? > > Now that I have installed a compressor and O2 and Helium aboard my dive > boat, I'm wondering what you trimix guys would use ?? I was thinking 25% 02, > 20% to 40 %He, balance N2 ??? > > I normally do two dives on her in the morning, rather than one long one, in > order to reduce the deco obligation. > > Suggestions and opinions please ! > > Kevin > > "Don't forget your history, > Know your destiny, > In the abundance of water, > The fool is thirsty." > > Robert Nesta Marley > > [\] > | > | > ^^^^^^^^^^^^^^^^^^^^^^ > o o > o o > o o > _____ o o > (_/\_) o o o > =( )= oo > > Kevin Rottner > Southern California SCUBA > > -- > Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. > Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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