[ArditoCorsaro]

Btw a techical date: a new build sub, can go also over crush depth and come back. Because the steel is new. But if you go over crush depth the boat is ready for scuttle later. Also if survive. While with the time, going to deep depth the steel is pressed and weaked. A sub that never gone over test depth, is in very good condition in spite of one that several times gone over test depth. So what do they?every time they reach a deeper depth, they mark one "cycle" for the steel. A hull with too cycles, is dangerous go too deep. And every boat is diverse: for example on paper, one class have a test depth. But that boat or this, can have a diverse test depth. It depend by the dock yard, by the builders, trials, etx
Ofc we cant make that on a game.
Is only for say that test amd crush depth depend by many factors
Source: a modern submariner chief enginer.