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At 05:36 PM 30/6/99 -0500, Robert Carlton wrote: >Hello, list Hello, Robert >There've been several comments on this list to the effect that diving twin >steel tanks with wetsuits is suicide. Low pressure steels as used in the US are extremely negatively bouyant. > >I've also read many divers explaining how they can add V-weights to their >tanks (aluminiums, I assume!!). Wrong assumption. >. as well as the thread that discussed the >pros/cons of locking your weightbelt in place with your crotch-strap. That thread concerned single tank open water diving only. Not overhead diving. >My question is: >What's the difference between diving twin steels (and wetsuits) and diving >weighted twin aluminiums (and wetsuits)? Not much. The REAL question is whether, with a single source of bouyancy, droppable ballast is preferable to fixed ballast. Another REAL question is whether, with fixed ballast, two sources of bouyancy are preferable to one. Finally, a separate question is whether a wing and a drysuit constitute two adequate sources of bouyancy. The answers are: yes, yes, and, try it. >I ask because this is common practice here in Sydney(Australia!). Sorry. Which of the above do you mean is common practice in Sydney? Steels, wetsuits and fixed weights? Alloys, wetsuits and fixed weights?, Locking the weightbelt with the crotch strap? It's a dog's breakfast out there, but none of these practices is common. >I use twin "75"cuft steels, and find that with 6lbs of lead (on a >weightbelt) almost empty tanks I can maintain a 3 metre stop with an empty >BC easily (ie, I am neutral). Thank you for sharing that with us, Robert. >On a related line... the use of twin-bag BCs has been negatively commented >on (to put it mildly!). >When I am not using my drysuit, I sandwich-on a second BC-bladder, inflator >disconnected. Understood. We will be looking out for you and are ready to render such assistance as may be required. rgrds billyw -- Send mail for the `techdiver' mailing list to `techdiver@aquanaut.com'. Send subscribe/unsubscribe requests to `techdiver-request@aquanaut.com'.
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