Additionally, the WWII silent service spent a good portion of the war firing useless torpedoes.
http://www.historynet.com/us-torpedo-troubles-during-world-war-ii.htm
Got a lot of them sunk by their own torpedoes, and some of the bolder fighters, like Richard O’Kane (who survived, but a lot of the Tang’s crew did not). Circular torpedo runs— and even into the later part of the war.
The dud/non-exploding torps were somewhat corrected eventually. Hell of a note with all the risk to set up a shot.