That's confusing large scale with small scale. You can prove that one time there existed one mistake on one map (or that story is covering up that there was a

That's confusing large scale with small scale. You can prove that one time there existed one mistake on one map (or that story is covering up that there was a navigation and/or helm error, or it covering up an even crazier story like hitting a submerged shipping crate or mine or enemy sub). Certainly no one has proven the public map is error free and flawless, and given that this is possibly the first time anything like this has ever happened to a nazy sub, every other map the navy has must be error free to a fairly high level.