Ehehe, good thing then
I'm sinking a lot of ships, which may be unrealistic, already sunk 101 ships (90 merchants and 11 warships) for a total of 405000 GRT by February 18th 1940. The most successful uboat in WWII sunk around 250000 GRT (without warships). My patrols last for around a week/week and a half, then imagine what I would do if I made longer patrols for 2 or 3 months; the Germans would only need me and my crew to win the war at sea with the Tommies
Other thing, I'm getting a lot of CTD's when fighting convoys, dunno why. I don't own a high spec computer, it's already 5 years old, but I can run the game with medium-low graphics. It's a Pentium IV 3.0 x 2 with 2GB of RAM memory and a Nvidia GeForce 9400GT.