[PepsiCan]

...that we have a button that does not work. So, either have it work or delete the button/turn it into an indicator.

Secondly, the date is not historically accurate. Pearl Harbor boats got the word at the end of march, 1943 (the date in the file), but Australia boats continued using the magnetic exploder for several months longer (1-2 full patrols in terms of the game). The date should vary depending on the command your sub belongs to. If that issue can be resolved with a mod, fine, no issue indeed. But it may also be that it is unmodable.

I don't think this is a game spoiler, but the way it has been implemented looks a bit odd/rushed.