Hey. me too! I started tests using rocks. I figure, if a rock attached with a string can reach the bottom, then I should be able to go inside a larger rock and reach the bottom too!
This guy seems to be taking safety slightly more seriously with his sub plans than the last guy. Which is unfortunate for people looking forward to more billionaires transforming themselves into paste.
This billionaire, rather than trying to wing-it and design his own submarine, is enlisting the services of a company that has already designed, built, and used a number of record setting deep-sea manned submarines.