BlueChart g2 Vision Large HD Chart Optimize your navigation experience with BlueChart g2 Vision charts. Thanks to; our exclusive autoguiding technology, your GPS automatically shows you the best route to take. follow. The most advanced nautical charts contain detailed data of coastal areas and waterways, including 3D display above and below the waterline, our technology exclusive self - guided, aerial photographs of ports, marinas as well as satellite images of coastal routes to 5 miles away inland. - Auto - guiding technology automatically calculates the best route to take. follow to reach your destination - Mariner's Eye 3D view for 3D viewing above the waterline - 3D FishEye view for 3D viewing below the waterline - Aerial photographs of ports and marinas. - High resolution satellite images of the coastal routes up to 5 miles away inland with points of interest - Tides and currents information All cards are in SD and Micro SD