UPDATE**
So I played around with everything, removed mods, added, mods, destroyed my campaign in the process

, oh welp I was warned by lsh3 about it, and I will pretend I died in an air raid at base.
But first of all I discovered this is the wrong thread. I added your mod as well as 'DGUI_1920x1080_for_LSH3_2020_ProPo' by ericlea and the newbie I am tought it was part of the same package.
I mass downloaded sh3, lsh3, your addon to it and his dgui on the same night, btw am I supposed to use diego's dgui? I cant find it. So RAOBF disk was added by either lsh3, or ericlea, I got no clue. But not you
Regarding my trouble with the RAOBF, for the curious of you, it works on most merchants ( I dont encounter warships beside escorts anyways) but I found two types for which the RAOBF ranging doesnt work, and neither does the x6 periscope marks with the according mast height chart. I checked if they were damaged and sitting low on water and it doesnt seem to be the case. So Im kinda confused. And if you use raobf for calculation range is a factor in the aob calculation so its important. Now I just clock the ships for speed and eyeball the rest. It works so far
In conclusion, thank you for trying to help me and sorry for wasting your time posting this issue in the wrong thread.