Thanks for assistance.
I'll retry installing ASAP. I used the no-DIY version, as I don't get any warnings about the mod from JSGME when installing.
It IS possible, that I just didn;t know, how to find the tools. But I didn't find that info in the "U-jagd tools mod 1.3" doc. - if it is somewhere there, it's a bit hard to find.

a special subsection "How to find the tools" would be helpful.
By the way: the doc. states, that the rar contains:
- Hitman's manual on conducting a sliderul attack,
- your description how to use the slide rules to do a passive sonar approach,
but I don't have them. I got the Hitman manual from other source, but would be happy to read your no-visual approach one.
Thanks for the mod.