Sorry to refresh an old forum, but I haven’t found to much for new info… What do you all recommend for a superior chip for an HDS gen2, right now I have a navionics hot maps platinum but it doesn’t show much for contours and only close to shore. I’d like to find something that will show isle royal also. The navionics apple app shows this area but I’m not sure if the reception will be goose bought up that way or if it will be very accurate. Any help would be great thanks!