The pdf is a lot easier to understand as it is broken down more and explained clearer,I just have a bit of difficulty with the final parts when triangulating the target.I think I will try and master this method just to get a rough idea of the course of enemy warships with powerful radar,whereby being on the surface would be too risky,against merchants or unescorted convoys I will stick to more traditional methods for getting course,speed,range
Good read though.