Fionn,
I looked it up, I sometimes do that for the fun of it and then especially seafaring of all kind and accidents on sea have always interested me. I looked in a search machine for web sites that had the two words 'submarine' and !accidents' in them and got a couple of thousand hits. I decided to try only the first one of them and it had a link to right site. Pure luck, I would have stopped after the first try.

Wolfgang