I have a Lowrance LCX27C and had a Navionics Hotmaps Classic North card from Dec 2004 and it did not have(contours)of several lakes in a chain I was fishing. I checked the latest Navionics cards and found the only one that is compatible with the 27c is the Navionics+ and its has contours of lakes I was missing.
I downloaded chart installer to computer and updated card and pluged in and will not show contours of lakes.
Any suggestions will be appreciated trying to fix issue this weekend.
Thanks...