Try <A target="_blank" HREF=http://www.raymarine.com/raymarine/Default.asp?site=1&SECTion=3&Page=171&Parent=166> Raymarine Support </A> and download the book
Try calling Dave Wellcome of Raymarine. The guru on all matters engineering and autopilots. V helpful indeed. Has helped many folk on this forum, even with finding "out of manufacture" spare parts....