On another failed warship note, the Vasa, built in Sweden in the 1620's barely made it off the dock before sinking but was amazingly well preserved. Worth seeing if you are in Stockholm.
https://www.slideshare.net/petecheslock/the-vasa-redux
And he actually did a quick lightning talk (5 minutes) on it the year prior at Monitorama:
It was a very funny and well done presentation. Definitely worth watching.