The US Navy, Russia, and France have 2-person spherical submersibles which will go deeper than that. I think there are also privately owned ones, like the one James Cameron went to the Titanic 35 times on. The Russians were doing something similar, selling rides down to the Titanic, but they could only take one tourist at a time. Rush’s “innovation” was to make a larger cylindrical submersible which takes more tourists at a time.
1 Timothy 6:10
For the love of money is a root of all kinds of evil. Some people, eager for money, have wandered from the faith and pierced themselves with many griefs.