FAT torpedo mod?

[Subnerd]

Originally Posted by Torplexed

Pattern running torpedoes like the FAT don't become available until about 1943. They don't come cheap either as they are usually pricier in renown than the more standard torpedoes.

Thanks Torplexed I was way earlier than 1943, so thats why I have not come across them. I think I need to do a few patrols early in the war, rather than jump straight into the fire!