Garmin's new BlueChart g2 cartography gives mariners detailed offshore coverage with featuresbeyond traditional BlueChart. Integrated maps provide a much smoother presentation on yourplotter screen View charts in 3D perspective View richer detail and content plus coastal roadsand points of interest (POIs), photos of ports, marinas and more (Note: photo coverage is limitedto certain areas currently; coverage will grow) Compatible with GPSMAP 3000 series units with a software upgrade and all 292, 298, 392 and 398 plotters