Resetting hull integrity in the middle of a patrol?

[Sailor Steve]

Originally Posted by PappyCain

If I can get to a milch cow I have found when reloading the sim, my hull has been repaired to 100% again as well as fuel, eels, and candy for the crew.

And that's one of the problems with the game. A milk cow should give you enough fuel to get home, two torpedoes for protection while getting there and should make no repairs you can't make yourself. A surface supply ship should be able to do a little more, but not much.