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To: mr.mark who wrote (8240)	9/8/1999 11:32:00 AM
From: SIer formerly known as Joe B.	Respond to of 32873

several choices: techstocks.com

To: mr.mark who wrote (8240)	9/8/1999 11:34:00 AM
From: Nemer	Respond to of 32873

Mark ... Heck, I'm on a guessing spree .... earth spinning makes it fatter at the equator than at the poles ... not sure about the 600 feet amount .... but that doesn't sound too unreasonable to me .... but differences in sea level from the gravitational pull of the moon creates the tides .... and the 600 seems excessive in that context ..... Well, there is your input ... worth just what it cost ...... gggg Nemer

To: mr.mark who wrote (8240)	9/8/1999 2:21:00 PM
From: Green Receipt	Respond to of 32873

FWIW about the sea elevation... Wait until you find yourself in this situation (actually happened to me) On the way up from a SCUBA dive to 110 feet I was hanging out at the last decompression stop when my 'buddy' ran out of air. (the swell was about 10 feet that day). Since there were like 6 of us hanging off this line that was attached to the boat, it seemed the most sensible thing to do was to move away from the line and give him my spare 2nd. Now we're just hanging out near the boat, and trying to maintain the 'depth of the original line. (The original line was maintaining a constant depth regardless of the swell because it was 'attached' to the boat). After a few moments, I just had to give up. Everytime a swell passed over us our 'relative' depth would increase by 10 feet. Then when I tried compensating for that (while trying to keep the 'buddy and the air going...) the swell would pass and I'd be '10 feet closer to the surface. I just gave up and surfaced. Took the chance that the Nitrogen wouldn't bubble into my blood. What I would have done differently.... In the courses they teach that when your buddy runs out of air you just hand him/her the spare 2nd. But in reality I found out 'your buddy' will just grab the one he/she sees you are using. Your buddy is in 'panic mode, survival of the fittest'. I think the better thing to do is to keep a spare 2nd and tank on the line at each decompression stop. They should have done this but since it wasn't a commercial dive shortcuts were taken. Carry a spare 5 minute tank. When it happens, get your buddy to use that. Then you are not attached... u can let the buddy do his/her thing and you can get away without endangering your life. Get a decent spare second. Get one you don't have to Suck hard on. When your 'buddy' is panicking, if you can hand him/her one that has a decent suck then that will calm them down. Often (myself included) the scuba diver gets a top-of the line primary second stage ($800) and a bottom of the rung spare 2nd ($100). If nothing else if your buddy grabs the air from your mouth you can switch to your spare and not have to worry about trying to get air. I have done commercial diving in the past. Sport diving in general is safe, but there are times when the unexpected can happen. Its in those times, that you may regret saving $50 on a piece of equipment. The ocean swell is also a factor on 'depth' and usually doesn't have much effect if you are at 40 feet or more. But once you get in the 0-30 feet range, it can really mess you up bad if you aren't careful.