Approach operations at busy airports are louder and less fuel efficient than they should be. Aircraft need to configure (extend flaps, slats and landing gear) and reduce speed prior to touchdown in an individual process. Air Traffic Control puts restrictions on the flight profile, however, and weather conditions are often only vaguely known. Thus the practical configuration sequence, and hence noise and fuel consumption of an approach depend very much on the pilots’ skills and their access to important information like the actual wind situation.