Something like this? DUI Thermal Guides for Dry Suit Diving / SCUBA
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I dont think this is totally unreasonable. Surely there must be a range of buoyancy figures that can generally work. If they dont exist then I accept that, but I would think people would generally be happy with having an IDEA of where they should start their weighting. Clearly a chart would only be a starting point and not something to base your final weighting on--im not sure why everyone here thought I was going to calculate on paper and be done with it.
As for the guy needing 18lb with a 3mm suit and 22lb with a 7mm, something is definitely off with the math there; it sounds like you're either doing something different or some equipment/environment has changed between the two (steel or alu tanks, fresh or salt water, mistaking the thickness of one or both suits, etc. or possibly a combination of the above). I'm sure it'll all get sussed out in time, but my money definitely isn't on anatomy being the answer![]()
So when I traveled to Monterey last year and went from diving a 3mil to a 7mil plus a 5mil hooded vest I added the commensurate weight (10 lbs) and when I weight checked myself I was right on the money.![]()
I dunno, maybe it's true, but it would be way out of the norm since the differences in suit buoyancies are measurable facts. Assuming all the equipment is the same, my initial guess for someone requiring 18lb to sink in a 3mm and 22lb in a 7mm would be that the 3mm may be trapping air.
Cause there is an 11lb difference in my 3/2mm to 7mm. I'm just saying.
I am sure this has been touched on before it is just the way I see it. Who knowsmaybe it is only 4 pounds.