I copped a nasty one off the coast of Norway last night in over 1000m depth. A DD was sitting about 120km off the coast stationary and I snuck up to about 500m fired one into his midships and when it hit, spouts of water everywhere then nothing. I sat off a km or two to watch him slowly sink beneath the waves without a single "Shes going down" or once of renown. Yes it was british, yes it sunk and no I didn;t get a bean.
Considering the Luftwaffe had already robbed me of 2 troop transports I was peeved!