Thanks, I enjoyed doing it.
Excuse these crude diagrams, did them really fast. Just wanted to show one of the advantages of doing a near parallel attack versus a more angled approach. These diagrams are to show what the actual target size would be like for the running torpedo fired from the subs from two different approaches. Notice from the parallel attack the actual target size is nearly the entire broadside of the ship while in the 2nd attack run, the actual target size is noticeably smaller. It's not an optical allusion but could be measured.
This was a historical type attack used in real life. If you also match the speed of the target, it is a way of double checking your plotted speed as well.
