So I've been really disappointed with this recently and turns out it's all my fault! I've been trying to use it with Real Navigation and every time I did I got totally incorrect and nonsensical results. I watched videos for hours, I read PDFs for hours, I tried practice results, I wrote down all the steps one at a time. Nothing worked.
Then today I realized that in step
27 of 31 steps I was making a mark on the WRONG LINE the whole time.

Hopefully it'll work next time I find a target. heh