I must say, Robbins, that this is the very best explaination of this method I've ever read here...and I've been reading quite a few of them while searching for my easy method
While my easy method is/was much faster, yours is more fun. I am also one to use the plotter a lot. I'm a draftsman by trade so I guess I'm comfortable there. I love finding a convoy on radar and tracking its progress on the charts, planning my approach or deciding if I will be able to get into position in time to meet them for a surprise...or doing similar by visual and sound in the earlier ships. Ahh, I just love this sim