GPSMAP 521 Chartplotter
Features an ultra-bright 5" QVGA display along with an improved high-speed digital design for faster map drawing and panning speeds. Plus, these waterproof units have a high-sensitivity internal GPS receiver, so mariners will always know their position at sea. It's ready to go with a built-in, satellite enhanced worldwide basemap and Garmin's proven easy-to-use interface designed to help mariners navigate the open waters with ease.
Features and Specifications: