Impossible for me. I float. But he sank like a stone…

The average male specific gravity is 0.98, but there is normal variability and some people are more dense than others. African American males also tend to have a higher bone density.

He was fit as anyone on the base, but still had to do the “dunk test” to get a medical waiver to keep from being put on the weight management program which would have gotten him passed over for O-5.

https://www.operationalmedicine.org/...e/40050200.pdf

https://onlinelibrary.wiley.com/doi/...1935.tb02118.x

https://academic.oup.com/jcem/articl...23249#62884704