I have been harbor raiding in the Schnell Boot all weekend
great fun!
left lorient in my Schnell Boot and proceeded to hit 2 southern port cities... only problem is you only get 4 torps!
I rumbled in at low speed and fired a spred of two at a docked large tanker from about 800 meters range and made an ahead flank U-turn, they had no idea i was even there until the torpedoes hit the target and sent a massive fireball into the sky.
those two Mercedes-Benz engines sounded sweet turning high RPM as shells and tracers passed overhead. One destroyer gave chase but couldnt keep up.
the next day i stumbled across a large convoy. when the destroyer broke off i rushed in at 39 knots with my boat occasionally jumping out of the water, and fired a spread at a large merchant ship and made a slight turn to parallel the convoy in the opposite direction. When the torpedoes hit the sky filled once again with tracers and shells but i thanks again to the loud rumble of those Mercedes Benz engines I escaped undamaged.
some of those shells splashed awfully close to me though!
if you havnt at least tried the schnell boot mod - its worth looking into. but beware... always leave yourself an escape route, because if those destroyers get your cornered all hell will break loose!