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+--- Thread: weights (/showthread.php?tid=1506)
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Re:weights - MNLakeDiver - 06-10-2004
[Body wt] x [mm of neoprene] x 2 x 1% = lead needed.
I like the formula I hav added it to my spreadsheet for diving formulas and it seems pretty close
Re:weights - Chadwick - 06-23-2004
Here is the bits out of the PADI AOW book, 'Adventures in Diving' ... (page 213).
This is to determine a starting point.
3mm/1/16 in. one piece wet suit, shorties, jumpsuits: 5% bodyweight
salt/fresh water change:
187-217lbs: 7lb (add to above for salt, subtract for fresh)
Aluminum 80 cf tank: Add 5lbs.
9.5 + 7 + 5 = 21.5 lbs.
--------------------------------
FWIW: I am 200lbs and in a full 3mm wet suit with gloves, hood and booties with a 50cf tank, I wore 28lbs in salt water. Though I believe I was heavy.
In Cancun, I dove skin with an 80 cf tank with 12lbs and was weighted ok.
Hope that helps.
-Chad
Re:weights - ghosch - 06-24-2004
Wow, that formula would put me about 12 lbs over even in a 5 mil. Does PADI sell their own brand of weights ???
I like the formula posted by Punky, except I would take out the X 2 (though that would probably be a weight a person could work down to, not one they could likely start at, unless you're really dense...
)
Re:weights - scubadog76 - 06-24-2004
If you have a brand spankin' new wet suit, you will require more weight until all the extra air gets smushed out of it. Just something to keep in mind for down the road.
Re:weights - Chadwick - 06-24-2004
I suppose PADI purposly makes sure you are overweighted as a starting point. Though they have a lot more info on their shart for different body weights and different thicknesses of wet suits and dry suits.
The formula posted by Punky puts me at 4lbs overweight.
Re:weights - Punky - 06-25-2004
ghosch;
You're right that would be a formula for fresh water not salt water.
Using 2% for salt water going by Chadwick's post comes closer, but doesn't work for skin.
[body wt] x [mm neoprene] x 2 x 2% = lead needed for salt.
200 x 3 x 2 x 2% = 24 lbs