I have a Raymarine
435i with no charts
in it. Manual says Navionics
gold card. Some places say no 1XG, 2XG. I got a card that is a "XL3 Classic
or Gold" 1G905XL3. In the plotter it comes up "No chart files available". In a card reader on my computer, the files show up. I tried opening them with Open CPN
and SeaClear and can't do that or don't know how. I haven't used either program much. Can anyone offer some help?