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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*
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