May, 1943, foggy night, Western Approaches. Submerged at 180 meters. Contact a convoy, call in pack, sink one ship myself. Forced to dive. Many game hours later, cannot shake a three ship Hunter-Killer group. Unlike Sh3, an AOD H-K group is something to be feared.
Doesn't help I took propeller shaft damage and its making noise.
Radio out, outer bow torpedo doors and fore hydroplanes damaged and unrepairable at sea also.