Dials v1.5?

[Ridgeback]

I think that would add to the realism. You shouldn't go much bellow 450' even in a Balao class. If I recall corectly, I believe about 500' was the deepest recorded depth. I'm suprised you survived at 600', wow!

In "Clear The Bridge", Richard O'Kane tells how he took the USS Tang (Balao class) down to 612 feet on her shakedown cruise. He stated "Tang had depth capabilities no American submarine had known before."

A little earlier when talking about the pressure hull, O'Kane said, "As I hoped, it could probably take twice the pressure of the stipulated 438 feet".

And this was December 1943.