That spreadsheet inspired the web-based tool Scuba buoyancy calculator which may be easier for simple weight estimates.There is an excellent, very detailed optimal buoyancy calculator spreadsheet created by @rsingler on this website.
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That spreadsheet inspired the web-based tool Scuba buoyancy calculator which may be easier for simple weight estimates.There is an excellent, very detailed optimal buoyancy calculator spreadsheet created by @rsingler on this website.
I should have said that one BIG advantage of this approach is you are buying separates, so the size of the Farmer John does not have to be the same as the size of the jacket/top. For example I have a Medium Farmer John and an Large top. Works for me!A similar solution is a Farmer John bottom and a separate top, either jacket or step-in long-sleeve top. Yje Farmer John dive syou double thickness over the chest& back so is a bit warmer.