Hi, manual targeting has always been a pain for me, and calculating the AOB would be a lot easier if I could get my sub to travel a parallel course to the target, but in order to do that I need to
find his course!

Forget Wazoos' tutorial, half the nav map tools he uses I don't have but even then too complicated, for me anyway.
In the past I use the nav map with god's eye view to match course & calculate speed, but this is rather cheating & not really manual targeting!!
There must be a relatively easy way though to find the targets course knowing:
1) Target Bearing
2) U-Boats course
3) Anything I may have missed!
If anyone knows of a good method could they please explain it to me?
Many Thanks.