To do this, just send a request and receive weather data either downloading directly from Internet or via Email. The received file weighs only a few kb. The built-in compression algorithm is optimized for binary data (grib format), making downloading over satellite phones and single side band (SSB) possible.
Once you´ve received and opened the grib file, the data will be overlayed onto your charts. Then, you can choose to display all or some of the following weather forecast data: Wind, Waves, atmospheric pressure, clouds and rain.