[the dark knight]

Convoys are hard..... What I have had success with so far is I line myself up with the second column, sit at 14-15m with nothing above the waves (no scopes, antennas, ect). rig for silent running, and bring both engines to all stop. Let them come to you. Then, after the leader has passed a sufficient distance, I will raise the scope so it is barely out of the water (less likely to be seen). Then pick your targets, fire and escape. To escape, I will run my engines 100 RPM's of less (or 1 knot), turn my boat 90 degrees and dive to 100m of depth. It is slow, but early in the war, it seems to work well. Other's might have a better way to go about it, but this is working for my type IXB currently. And if you are depth charged, when the destroyer starts dropping charges, go to flank. When the depth charges start exploding, make a hard turn, change your depth and as they stop exploding, back to 1 knot and do the whole dance all over again.