Owner's Manual
Page 13
Using the Navigation Chart Use the Navigation chart to plan your course, to view detailed Navigation and Mariner's Eye charts. GPSMAP 400/500 Series Owner's Manual Mariner's Eye 3D charts and Fish Eye 3D charts are using a GPSMAP 421, 521, or 526 (including "s" models), you must insert an optional BlueChart g2 Vision preprogrammed SD card to view map information...
Using the Navigation Chart Use the Navigation chart to plan your course, to view detailed Navigation and Mariner's Eye charts. GPSMAP 400/500 Series Owner's Manual Mariner's Eye 3D charts and Fish Eye 3D charts are using a GPSMAP 421, 521, or 526 (including "s" models), you must insert an optional BlueChart g2 Vision preprogrammed SD card to view map information...