Navionics new Gold+ XL9 Cartridges pack all the great features of past Gold Charts while covering a much wider chart area. Navionics Gold + XL3 covered the U.S. and Canada with a total of 20 Cartridges, XL9 covers the U.S. and Canada with just eight charts for a huge area of coverage area. Compatible with plotters using CF (Compact Flash) or SD (Secure Digital). Gold+ Charts XL9 feature: Paper-like chart features with safety contours and high definition fishing details Zoom, filters and port descriptions with services and phone numbers Expanded wreck and diving database Easy to use, plug and play technology FREE Fish N Chip cartridge (via coupon as these charts are plotter specific)