Step by Step for AOB

[rdhiggins]

Can someone please give me in simple terms the best approach in determining the AOB. I don't need any trig or math professors instructing me to perform a rocket equation but something simple and more accurate then what I have been doing.

Before anybody suggests that I utilize the search forum option.... trust me I have!

I have looked at the wheels, other peoples way of suggesting it... and lately I feel defeated since sometimes I feel like I am making progress and other times I feel like I took 2 steps back.

I understand what the AOB means such as if I was on the enemy ship where the placement of my sub but I just don't understand how to go about and determine the steps to determine the AOB.

99.9% of the time my shots are either way before or way after.

and by the way is the yellow tick mark in the six o'clock position of the upper dial in the TDC the target course? Or is it the white arrow?

Thank you, and appreciate any help!