Easy Peasy AOB.

[HMCS]

I don't use a wheel. All you need is the protactor, and your target's course.



1. I am lined up here a la Dick O'Kane, but it works with any angle. It's relative to your target. I place the protactor on the line drawn on the target's course, in front of the target.




2. Draw the protactor on to your target.


3. Draw the protactor over your sub's position. Est voila. AOB.


I get about 95% hits with this. When I miss, it's usually because I get the target's speed wrong.