Plug a BlueChart g2 Vision SD data card into your chartplotter, and you'll get a whole new perspective on nautical navigation. BlueChart g2 Vision offers the same rich detailed charting of BlueChart g2 to help you get the most out of your unit. In addition, g2 Vision features a growing database of high-resolution satellite imagery, above and below the water 3D perspective, auto guidance technology, aerial photographs for real world reference and coastal roads with points of interest. PRODUCT FEATURES:Detailed coverage of the eastern half of the Gulf of Bothnia from Kristinestad to Turku including Pori, and the entrance of the Gulf of Finland to Hanko, including Tammisaari and Salo;Also includes detailed coverage of Aland.