Plain English Meaning

A service that sends weather and other flight information to your cockpit display while you are flying. It gives you helpful information to plan and stay safe, but it does not give you instructions from air traffic control.

Full Definition

A data service that delivers non-control aeronautical information to pilots in flight, including weather products, NOTAMs, TFRs, and other advisory information. In the United States, FIS is most commonly delivered free of charge over the ADS-B network as FIS-B, and is also available through commercial satellite-based providers. It is advisory only — it does not provide air traffic control instructions or .