Deep water version of your every day metal detecting. I know some companies already do salvage reclamation/research, but I'm talking about going hunting for smaller trinkets and seemingly "worthless" items in the eyes of corporations and research centers.
Only thing stopping me is I really don't want to be Oceangate 2 lol.
So far my luck with thrifted clothing has been abysmal besides the leather jacket. But I'm hoping I'll get luckier the more I try.