Navionics, electronic cartography and navigation data supply, announces the availability of its free application for iPhone users, Navionics Viewer, which includes fully-functional marine navigation charts for Southeastern Florida, as well as marine and outdoor cartography for Genoa, Italy. Navionics Viewer, with the free cartography samples, allow you to see your GPS position, tap and pinch the screen to zoom in and out, scroll the chart seamlessly, query chart objects, find your favorite marina, adjust depth units, and view in day or night mode.