Silly question - How do you...uh...patrol... in 1944?

[Jimbuna]

Originally Posted by Leandros

I don't know about the VII but the XXI is actually faster (on diesels) submerged with extended schnorkel than when surfaced. Which can be handy when you want to pull out of a skirmish. Operating on schnorkel should give a higher noise level as well as less sensitive passive sonar.

Sadly, this is one of the unrealities of the game because a U-boat was unable to travel in excess of 5 knots with the schnorkel raised for fear of the vibration shearing it off.