How to calaulate BC lift

[GDCB]

Ok guys and very lovely ladies. I'm looking into a BC purchase and am not quite sure how to determine needed lift.

If weighted properly at the surface you should be about 5lbs negative. Then with a depleted air supply you are roughly neutral after your dive.

At depth, with wetsuit compression you should be negative the amount of air volume compressed in the suit.

Please feel free to correct me about the above^^^^^^^^^^

SO FINALLY MY QUESTION.

How much lift does your BC need and how do you determine it?

Thanks Carl

 

[fdog]

General rule of thumb for me: If diving wet, my BC needs to have the bouyancy of my weights + 5 lbs.

This way, I'm still neutral at 90' when my wetsuit has squished to paper thickness, and all that lead has nothing to float it. Plus the weight of the gas load.

The manufacturer usually publishes the max bouyancy of each BC. Take it with a grain of salt.

All the best, James