Game Manual You are an air traffic controller with the responsibility for the flow of air traffic within an area of 15 x 25 miles, from ground level to 5,000 feet altitude. Within this area are two airports, two navigational aids, and ten entry/exit fixes. During the course of the game 26 aircraft will become active inside this area. Your specific responsibility is to guide each of these aircraft to its predetermined destination within certain time and safety restrictions.