FANS-1/A design is a range of Future Air Navigation System (FANS) products. FANS is an avionics system which provides direct data link communication between the pilot and the Air Traffic Controller. The communications include air traffic control clearances, pilot requests, and position reporting. FANS-1 is Boeing's solution and FANS-A is the Airbus solution.
ATC services are now provided to aircraft equipped with FANS-1/A in other Oceanic airspaces such as the North Atlantic. Although many of FANS-1/A's known deficiencies with respect to its use in high density airspace were addressed in later versions of the product (FANS-1/A+), it has never been fully adopted for use in continental airspace.