Did a T-class submarine ever fire all ten bow torpedoes at one target?
Short answerApparently yes, though two four-torpedo salvos would keep two weapons in reserve.
NotesThe T class could launch an exceptionally large ten-torpedo bow salvo. Examples apparently occurred in the Mediterranean and North Sea, while a possible Pacific case remains less certain. A more cautious tactical method would fire four torpedoes, followed by another four if required. Keeping the final two ready would preserve a snapshot response against an unexpected target or changing geometry.