http://books.google.com/books?id=j3B_0y_hVbsC&dq=boat+electronics+manuals&printsec=frontcover&source=in&hl=en&ei=mffxS7rgHIGBlAeZyvH2DA&sa=X&oi=book_result&ct=result&resnum=11&ved=0CFYQ6AEwCg#v=onepage&q=boat%20electronics%20manuals&f=false
