Well as I play in the Wolfpack campaign I have to sail back to base
Not something I used to do when first started playing but does increase your danger as you have to be carefull on way home with few or no torps and maybe Hull damage too
In fact in my current campaign patrol am making my way down to meet the supply tanker in Cadiz - have had DC attack and have no periscopes or sonar

one crew member dead and 1 prop out of action as well as having no torps and deckgun destroyed too
If I was playing on my own I might have beamed back to base but have to stay alive long enough to get to the supply ship now - well its was either the supply ship or try and run the channel with no eyes or ears
Certainly adds an edge