This slim GPSMAP 525 marine navigator boasts the brightest, sharpest, most colorful graphics you've ever seen on a 5-inch screen. The GPSMAP 525 has a 5" VGA display, built-in worldwide satellite-enhanced basemap; and simple, straightforward buttons and menus. You can add the optional BlueChart g2 Vision SD card for even more enhanced features. The worldwide basemap includes realistic satellite imagery that shows up clearly on its crisp, ultra-bright screen. The SD card slot makes it easy to add additional maps without connecting to a computer. And with a simple, intuitive interface and high-speed processor, the 525 makes navigating easy.