I fish out of Jupiter Inlet. Just bought a Humminbird 858c HD and the Platinum Plus card. I downloaded the latest "freshest Data" through the Navionics application. During download, the screen said it was downloading Sonar Charts. When I view the charts on my Humminbird, I do not see any contour lines- only spot depth indications (which have been listed as a Sonar Charts feature). I have been through all the menus on the unit several times and do not see any setting for map layers, etc. . . Anyone have any idea why this data is not showing?