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EKu4833380@ao*.co* wrote:

> Hello all im kind of new and got a problem i cant figure out .Can any of you
> ??
>         How to figure out how much weight a 410# fully equiped diver(no lead)
>  needs for diving in salt water (64#-cf) or fresh 62.4#-cf)??????I think i
> screwed it up
>  a diver 410# displaces 6.40 cf   of water 410 divided by 64= 6.40 ( in sea
> water) 6.40 X64# ( what a cf of sea water weighs ) = 410# so the diver is
> nutral .Its wrong though
>      When i tried it with my weight 15# i still wound up with 425# for the
> answer .
>  Any ideas what im doing wrong or how  to DIR

The general misconception is that the body is not the main source of
boyancy it's the equipment a diver carries!
From a theoretical point of view you could calculate the weighting, but
thats not practial. There are so many variables that would have to be
taken into account to make such a calculation sufficient precise.
Just to name a view:
- the density of the water can vary (eg. freshwater vs. water from the black
sea)

- the desity of each body is slightly differnt
- the loung volume has a massive influence
- carried equipment (suit, tanks, valves)

I adjust my weighting so that I can just remain at 10ft when my tanks are empty
(~300psi) and the wing empty.

Regards, Frank


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