i Sail GPS : USA NOAA Marine Chart Plotter!

Your iPhone or WiFi+Cellular iPad can be a high-performance GPS receiver with USA NOAA Raster Nautical Charts Rated Best Choice Excellent by Practical-Sailor.comOn the water in a bad storm and your chart plotter just failed? Download this app now. View charts using the iOS device alone Continued use of GPS running in the background can dramatically decrease battery lifeWinner of the Practical Sailor Editors Choice AwardSailing becomes safer and more fun with iSailGPS