The training requirements and the project schedule for the ACS (Air Combat Simulator) will be presented first. Then, after a brief description of the technical principles and components used in the simulator, will follow a more detailed presentation of the equipment, emphasizing the system features: high realism, versatility, variety of operational conditions, powerful and easy-to-use instructor's facilities, maintainability, flexibility for future modifications. Finally, last point to be presented will consist of comments about the visual environment generation system: general organization, horizon projector, target projector, computer generated imagery and missile projector. The simulator described herein is to be delivered to the French Air Force in the last few days of 1984.