I had an almost paraell story to yours.
Except mine was in 1943, and i was attacking a docked T3 off of belfast harbor. I already put 1 torp into her when i got sighted by a little patrol boat. So i went to periscope depth and lined up the kills shot. I launched two eels, a TI and a TIII. As the torps were speeding toward thier destination the partol boat(which was circling my persicope at the time and crusing @ 25+kts) went right into the T1s path, boooom!!!! bye bye little patrol boat. Luckily the TIII trop found its target and broke her back... because that was my last torp
