TDC updating newbie question

[Sailor Steve]

Originally Posted by Zosete

Now I only have one question left. AoB is relative to course rather than ship angle, right? I mean: if i'm trying to catch a ship that it's zigzaging slowly in front of me, his bow swings wildly but the "average" course is relatively unchanged. I still don't get if the TDC is able to update AoB when the target changes its course. I reread your posts but I'm a bit puzzled about this.

AOB is the angle he sees you at. If he's heading directly toward you the AOB is 0. If his lookout would say "Periscope at 20 degrees!" then the AOB is 20.