Its essentially irrelevant.
even then its got a hit rate of just over 6%.
The figure was 6.71%. The figure at Savo was 13.1%. The figures are indeed irrelevant because they refer to ship-launched torpedoes, sometimes at night, and sometimes a game changer, forcing Marines to eat maggot-infested rice.
The Japanese didn't employ Long Lance, Type 93, from subs. They used the also effective Type 95, a 21" fast torpedo with a big warhead. Anyone know the hit rate for the Type 95, and to be fair, all other sub-launched torpedoes?
The Germans could also derive some benefit from obtaining the air-launched Type 91 torpedo, and creating aircraft and tactical doctrine to employ them. They had the widest, easiest launch parameters in the business, they were fast, and made a big bang.