“... Our military subs are construct with a steel whose recipe and capabilities are one of the Sub communities best kept secrets....”
The Navy keeps careful track of the number of cycles from surface to depth as each cycle does a tiny amount of damage to the hull. The CEO of Oceangate made a big feature that the hull of his sub was designed by a former NASA engineer. Engineering for space and engineering for water are wildly different. I listened to someone who designed subs talking about why carbon fiber was a bad choice. He said you can only do a finite element model of solid surfaces. Carbon fiber is made of thousands of strands. Over cycles it experiences micro cracks and intrusion seepage you can’t see or measure. When it fails, it does so like a ceramic dish hitting a tile floor; sudden and catastrophic. He and others had sent a letter some years ago warning of the poor choice and they were ignored.
Another issue is the CEO didn’t want a bunch of fifty-year-old white men working for him as they weren’t “inspirational.” I watched one of his female employees, a YouTube “influencer” talk about her job with the company. Apparently, she had been hired to be inspirational rather than for any specialized knowledge. She posted a video of herself taking a fellow straight white male employee to a drag show. I have to wonder if the straight white male employee had to lie to get the job.
Being a NASA engineer doesn’t mean squat. What this idiot needed was some other kind of pacifier. Maybe a bottle of scotch would’ve put him to sleep