I recently "inherited" a Cetrek autopilot, computer model 930-683; controller is marked 770. No manual. I cannot find a manual online for that model--anyone know where I can get a manual online (PDF)?
1. I suggest you to contact these members of CruiserForum.com if they are still active, I’m aware that's a 9 years old thread there but perhaps a path you should explore. Give it a try.
CETREK Autopilot. Manuals and Documents: "Over the years we have had quite a number of equipment and gear installed, some good, some better, some worse. We reference only equipment which is no longer available. We still have the full documentation including installation and operation manuals or where we provide own information free-of-charge for download. For details please use the contact document."