https://www.youtube.com/watch?v=4dka29FSZac https://www.youtube.com/watch?v=4dka29FSZac Here is a quick and dirty analysis from a US Submariner of 20 years. I

https://www.youtube.com/watch?v=4dka29FSZac https://www.youtube.com/watch?v=4dka29FSZac Here is a quick and dirty analysis from a US Submariner of 20 years. It is supposedly, incredibly hard to find defects or damage on carbon fiber. SpaceX did cite this as a reason for using stainless steel. His belief is that there was a hull failure somewhere on the carbon fiber hull; a failure point that simply wasn't found before this dive.