Old Electronics, Any Support?

RayMarine 300 GPS Just back from the METS in Amsterdam and while there I saw some really cool new things that I will share with everyone over the next several weeks. But, first things first. I received a query from a reader several days ago and I need to get the question answered as best I can. So, here's the question: Peter writes in: Raymarine no longer services the Raynav 300. Do you know of a source for repair manuals. I would like to attempt to repair the unit that I have. My response ...