There are news articles on how extremely rich people own their own submarines. Not just tiny submersibles, but large vehicles that have enough room for living quarters. Google searches show computer renderings of what some of these vehicles look like, but I have not been able to find an actual photograph, anywhere, of an actual vehicle. Do these things really exist? How do their internal systems work, and what kind of range do they have?
The existence of such vehicles made me wonder : suppose a mega-rich person were caught for committing some serious white-collar crime. Perhaps tax evasion or hiding assets offshore or investment fraud, the usual stuff. How would the lawful authorities bring them in if they decided to submerge and sneak away? It’s not like they could use depth charges for an escaping fraudster, right?