The operational experience and technical know how acquired in air combat simulation has led THOMSON-CSF Simulator Division to develop a new simulator projection system. This equipment called "MARS" for Multiple Aircraft Raid Simulation, provides combat pilots with better perception of their targets for multi aircraft training by overcoming the limitations of light valve projectors. In particular, the use of laser and acousto-optical techniques provides high contrast images without halo. The images displayed by MARS are usually ground or air targets, missiles in flight and the sun, but it is also possible to display gunnery effects such as tracers and countermeasure decoys.