Got into a convoy almost perfectly

Suddenly some destroyers decided to drop depth charges at me, well before evading I decided to launch a salvo, maybe I'd get lucky and hit something. The depth charges hit my coning tower perfectly, everything destroyed, all the scopes, radar warning, flak's everything...

I turned my tail , launched one circling torpedo at the convoy and went to 230m.
After the torpedo circled and missed a whale factory, some troop ships and tankers it decided to hit a 2kT Nipiwan tanker, well at least it sunk it. Going back to base was fun, no radar warning and the watch crew refused to go up and watch for ships. I hate going blind....