As far as I know the external reloads were allways steamers, but other than that Mostly electric torpedoes were used with steamers being the prefrence of some Kaleuns due to their increased reliability during the early war years.
As for acoustic and patern runing torpedoes, I dont really know the loadout for those, but I would assume that the number of acoustic torpedoes was very low, say no more than 2 or 3 on a boat, but this is just a guess from looking at the number of such torpedoes fired in total.
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