There are some phenomenal sailing apps available in the Apple app store. Whether you need weather advice and forecasting, knot guides, flag signal information, racing rules or even a whole social sailing community they are all available. We have selected the very best for our top 10 iPhone and iPad sailing apps. Take a look at these and down load a few before your next voyage. iGrib iGrib is a GRIB (GRIdded Binary) file viewer for the iPad and iPhone. It allows you to see the same data that the professionals use for forecasting. This app is particularly valuable for people like sailors who require a longer range forecast. This…