This family of games is about dogfights between small numbers of aircraft. Spitfire and Foxbat & Phantom can have up to four aircraft per side (with a countermix of 255), and the magazine game Flying Circus up to three planes per side (with a countermix of 200). All the counters are necessary to keep track of each aircraft's current status.
Each aircraft will have its own distinctly colored set of counters, one of which will be on the map. The counter on the map will have an aircraft icon and a single number. The number represents its current altitude, and will increase or decrease as the aircraft climbs or dives.
Each aircraft will also have a large chart showing other aspects of its current status, such as velocity or ammunition remaining. Differently delineated charts are used for each aircraft types, for example the Focke-Wulf's chart permits a greater maximum speed than the Spitfire's.
Other subjects for games using this system were considered but never produced, including a World War II eastern front game titled Sturmovik.
All the games using this system were designed by Jim Dunnigan, and were the only tactical air combat games he designed.