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Very sensible - not - redundancy and extra gas is never a bad idea - = people who want to overstay will overstay - at least if they have = problems or use too much gas they have some redundant supply......the = days of single cylinder diving for most ranges (including standard = Sports) is fading - no one is saying use twin 18L which is for long = stays - smaller twins are sensible for sport diving. The reason from PADI if current is a bit dated and needs review.=20 Colin ---------- From: Kevin Connell[SMTP:kevin@nw*.co*] Sent: 27 May 1997 17:14 To: David Grahame Drew Cc: techdiver@aquanaut.com Subject: Re: Twin Tanks PADI doesn't recommend twin tanks because you might overstay your no-decompression limits. At 05:09 PM 5/27/97 +1000, you wrote: >Hello,, > I'm interested in using twin tanks for deep air diving. I've got some >general questions and I was wondering if someone here might be able to >answer them. > >1. BCD. > Is the lift provided by standard BCD's enough for a twin tank setup? = I >know that most BCD's aren't designed to hold twins, but a friend said = he can >set mine up to hold twins easily, and has done it to his identical BCD = a >long time ago. What sort of lift is needed / desired? My current BCD is = a >Seaquest, with 26 pounds lift. > >2. Tanks. > What sort of tank setup works best for twins? Do you use twin steel, = twin >Al, or one of each? If using a regular BCD, what would be the best = choice? >Do the tanks need to be / preferred to be, same size / volume / working >pressure? > >Here's also some personal info, if it helps in answering any of the >questions. My standard setup is the Seaquest BCD with a steel = low-pressure >100cf tank. My normal wetsuit is a 5mm 'farmer john' with a 5mm jacket. = I'm >5' 10" and weigh 70 kgs. As a result of all the above, I don't need a = weight >belt at all. > >I know that tanking a tech course that deals with these questions would = be a >good idea. I intend to take one as soon as the weather around here = warms up >a bit, but any help you could give me now would be appreciated. > > >Thanks in advance, >David Drew. > >dgd02@uo*.ed*.au* >-- >Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. >Send list subscription requests to `techdiver-request@aquanaut.com'. > > -------------------------------------------------------------------------= - Kevin Connell <kevin@nw*.co*> Northwest Labor Systems http://www.nwls.com Bellingham, WA -------------------------------------------------------------------------= -- -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'. -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send list subscription requests to `techdiver-request@aquanaut.com'.
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