started in the early 1980s FANS-1/A+ http://en.wikipedia.org/wiki/Future_Air_Navigation_System Future Air Navigation System § Surveillance improvements Future Air Navigation System FANS FANS Future Air Navigation System http://en.wikipedia.org/wiki/Future_Air_Navigation_System FANS FANS-1/A+ according to Wikipedia FANS FANS (Future Air Navigation System.) Future Air Navigation System Wikipedia according to Wikipedia Future Air Navigation System