The app displays near real-time data from 2 sources:
- weather buoy readings from several weather services including the NOAA, the Met Office and Météo France.
- airport station readings called METAR,
Weather buoy data is generally updated hourly. For airports, it varies but often in the order of 30 minutes.
If your Android device is connected to the Internet, the download is automatic. At sea, with an Iridium Go, the user can upload small files containing the data for his navigation area.