[Mahler9th]

Perhaps of interest:

https://stanleysubmarines.com/

Stanley took at least one dive in Titan and heard cracking sounds.

https://www.youtube.com/watch?v=0mSq6ibKKXQ


Stanley:


"When Karl Stanley was aboard the Titan for an underseas excursion off the coast of the Bahamas in April 2019, he felt there was something wrong with the vessel when loud noises were heard.

The day after his trip, Stanley sent an email to Stockton Rush, the CEO of the vessel's operator OceanGate Expeditions, sounding the alarm on suspected defects.

"What we heard, in my opinion ... sounded like a flaw/defect in one area being acted on by the tremendous pressures and being crushed/damaged," Stanley wrote in the email, a copy of which has been obtained by CNN.

"From the intensity of the sounds, the fact that they never totally stopped at depth, and the fact that there were sounds at about 300 feet that indicated a relaxing of stored energy /would indicate that there is an area of the hull that is breaking down/ getting spongy," Stanley continued."

""He canceled that year's dives and took that carbon fiber and cut it up, found the defects and made a new one at the cost, I believe, of well over $1 million," Stanley said."

Stanley's self-designed sub is used for tourism, perhaps amongst other things.