I was just sunk in a balao in July 43 at 548 ft deep in the East China Sea, silent running was active but completely ineffective, same goes for that thermal layer bollocks as well. What I did notice though was this unerring ability to locate the sub by this destroyer, it seemed to have this super sensitive hydrophone and sonar that could pick up a dolphin breaking wind at 500ft.
Destroyer in question had a number 20 on the bow of the ship and some kind of Japanese markings in the middle, "it+jT" is what that looked like.
Now to my next observation, the balao submarine has the torpedo settings set to contact instead of influence, I know it can be changed inside the game but I would like to know which file controls that so I can change it outside of the game.