Hi all,
I have made a Bouyance Chart for you all to use. Only in metric measurments for now, but I will try to get some silly american measurments in soon.

Too often I see subbers making as big a WTC as they can fit in there outershell. Then when it comes to diving they have to load it up with somtimes Killograms just to get it to sink. So no need for that anymore, just add up your weight and cross reference it with the bouyancy. Leaving some room to add a little weight for balancing,keel etc.

Remeber bouyancy is in grams

Ah got a better idea. You tell me the diameters of your tubes then I can simply add them on.

lol never thought to check but its all wrong... silly Excel did it all wrong. It's basicaly twice what it should be.