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--0-1804289383-960074346=:3619 Content-Type: text/plain; charset=us-ascii I'm not very well versed in the use of helium at shallow depths. What are the advantages over, say, EAN 39? Sidney Brock Frederickson wrote: Peter: This summer and Fall I'm planning some dives along the same lines with the Oklahoma Historical Society and then as part of my cave training with OCDA I can tell you right off though that at those temps and durations you can plan on some decompression time. Maybe not the massive times you've heard of , but enough to warrant a smallish stage (30-40 cf) bottle of O2. I trust you are diving dry, staying well hydrated, and using a p-valve. Even tho the depth seems shallow, the temp and duration make me think that maybe helium would be a good idea here. Anyone care to comment? In the meantime If you want send me some of your planned profiles and I'll run them through Decoplanner and GAP. Dive Safe Brock Fredeickson www.uwservicesllc.com ----- Original Message ----- From: Peter Steinhoff To: Techdiver Sent: Wednesday, May 31, 2000 1:53 PM Subject: Exposure 3h+ What type of problems are you going to run into when you extend the running time from 2 hours to 3-5 hours or so? I'm planning a "long" but very shallow (40-50ft) dive, 45-55F. -- Peter Steinhoff DIR diver (trying...) --0-1804289383-960074346=:3619 Content-Type: text/html; charset=us-ascii <P> <BR>I'm not very well versed in the use of helium at shallow depths.</P> <P>What are the advantages over, say, EAN 39?</P> <P><BR><B><I>Sidney Brock Frederickson <BFREDE1615@EM*.MS*.CO*></I></B>wrote: <BR>Peter:<BR>This summer and Fall I'm planning some dives along the same lines with<BR>the Oklahoma Historical Society and then as part of my cave training with<BR>OCDA<BR>I can tell you right off though that at those temps and durations you can<BR>plan on some decompression time. Maybe not the massive times you've heard of<BR>, but enough to warrant a smallish stage (30-40 cf) bottle of O2. I trust<BR>you are diving dry, staying well hydrated, and using a p-valve.<BR>Even tho the depth seems shallow, the temp and duration make me think<BR>that maybe helium would be a good idea here. Anyone care to comment?<BR>In the meantime If you want send me some of your planned profiles and<BR>I'll run them through Decoplanner and GAP.<BR>Dive Safe<BR>Brock Fredeickson<BR>www.uwservicesllc.com<BR><BR><BR>----- Original Message -----<BR>From: Peter Steinhoff <PST@IN*.CO*><BR>To: Techdiver <TECHDIVER@AQUANAUT.COM><BR>Sent: Wednesday, May 31, 2000 1:53 PM<BR>Subject: Exposure 3h+<BR><BR>What type of problems are you going to run into when you extend the running<BR>time from 2 hours to 3-5 hours or so?<BR><BR>I'm planning a "long" but very shallow (40-50ft) dive, 45-55F.<BR><BR>--<BR>Peter Steinhoff<BR>DIR diver (trying...)<BR></P> --0-1804289383-960074346=:3619-- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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