Hi Mr Forester a very warm welcome to Subsim the one stop shop for SH3-SH4-SH5 Mods Help and advice theres a lot of time served Uboat skippers and Modders that are all round good eggs here and will help you answering questions and helping you get your Mods squared away Saltue Sir Happy Hunting.
1. did you have dud torpedoes activated in you realism settings.
2. was the sea state rough.
3. also was it early war 1939 - june1940.
if so then torpedoes were prone to running deeper or premature detonating
I would only use magnectic setting in calm seas in early war setting
I see your looking at SH3 Commander Mod 2.6 theres a newer version download link below
https://www.subsim.com/radioroom/dow...o=file&id=4789