Most newcomers I've seen do think that AOB is what the periscope bearing shows when they look at a target. So they think it is what we call relative bearing as seen from own ship. Neal tried to correct that with his document. No matter if you get the target course from the map-plot, or take a visual snapshot of it, you still need to know the correct meaning of the dial. If you don't set the needle to the proper angle concept, then garbage comes out. So Neals intent is very valid. How you use it is another matter.
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