Animated diesels + easy target plotting guide
 

https://youtu.be/HgZa_lxPG_A

There are several methods to get a solution that results in torpedoes on target. I'm not claiming this is the best but it works for me, doesn't require a Microsoft spreadsheet, and is pretty accurate and quick. From the time we select our target and make our first course change to torpedo impact is less than 12 minutes.


Steps
Select target
Plot own course to intercept
Plot target range and bearing
Get speed estimate
Plot target range and bearing
Plot target AOB
Sink target

That's a good navigation video. Thanks. I will pass it along.