Problem with calculating aob using OLC gold

Hi all,

I'm trying to get my head around the various ways of calculating things with the excellent OLC mod, but have hit a snag with the aob method. I've followed the video tutorial, and also the updated one for the gold edition, but when I come to read off the aob from counting the horizontal marks to the bow, I am finding that it is past 90 degrees on the inner ring and so I can't read it off. Am I doing something wrong?

Thanks in advance,

Wibbs