How long was the typical U-Boat patrol?

[Sailor Steve]

Originally Posted by GoldenRivet

2. Days in port set to 30... if the U-boat is badly damaged i will exit the game and reset days in port to 50 to simulate dry docking and repair of the sub taking a long time.

I set my days in port to random, since I think while it sometimes goes to extremes it is mostly centered around 28 days anyway. As for damage, Commander (or the game) adds a day for each point of damage anyway, so I don't think there's a need to reset it.