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Originally Posted by USS Drum
Ohhh... a documentary I watched said it was 600ft.
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Did it list that as "crush depth", "test depth" or just "maximum depth"?
There tends to be a lot of very ambiguous words surrounding that discussion, some of which are very misleading and based on guesswork rather than hard fact. People easily forget that "crush depth" is not a hard number that anyone ever really knows until a specific boat actually implodes. And there's no way to know that in wartime.
I think basing estimates on real accounts of boats that lived down to a certain depth is a good way to go. In the end, it's a game after all and it can't model real physics of metal fatigue in detail, so test depth + % cushion based on real historical accounts of surviving boats isn't a bad compromise.