I have done the single mission, & it is a b! Though if you can pull it off, you can win big.
First off, no offense to the above posters but in the real sub world diving deep is a sure way to get killed, plus a WWII submarine could not get out of the Mediterranean because the submerged current was greater than 7 knots which was more than the subs could go submerged.
So if you want a little reality when doing that mission remember these facts.
1. Sonar does not work against surface ships.
2. You can operate your diesels with decks awash.
3. Destroyers are deaf at greater than 20 knots with a linear drop in hearing between 10, & 20.
4. They are also deaf when you are behind them.
5. Surface spot lights reflect off of night time water. Translated they cant see you underwater at night.
6. Your torpedoes need 300 meters to arm.
7. Your hydrophone operator can detect fast boats on attack runs.
8. High power centimeter radar had not yet been implemented at that time. They can see your full sub outline but not your periscope.
9. The African side is your side.
Good Luck, & something to shoot for. I got through on the first attempt getting into Spezia with sinking 9 ships. Thats nine grasshopper.
Let me know if you can beat that, & I wont believe you.
Manock
The helicopter doesnt mean anything, I just liked the graphics.