My misunderstanding then! lol - I took your post as you not being able to find the mod anymore. Quite a few of the older SH5 mods do not work, or are no longer needed when using TWoS or Sobers mega mods.
Not to detract from the U-190's post and your reply, but do I understand you to say you would like to see RFB-style submarine control and reaction in FotRSU? Or maybe real navigation like SH5 has? I've been following that quite a bit also lately in the SH5 threads.