> It’s very likely that the torpedoes did not work for the whole war really. The patrol reports of each sub detail pretty well what shots were taken and after

> It’s very likely that the torpedoes did not work for the whole war really. The patrol reports of each sub detail pretty well what shots were taken and after the fixes in '42 and early '43, the hit percentages rose dramatically... 1944 and 1945 were very good hunting times for US subs in the Pacific. They sank an amazing number of targets in a very short time. (Former US submariner and very amateur military historian.)