The French Army has ordered a large quantity of On-Board Gunnery Simulators (OBGS) for the intensive training of gunners on small caliber cannon at their regiments. Small and versatile, the OBGS can be fitted to a large number of armored vehicles and anti-aircraft guns. The simulator generates a simplified synthetic Image in the gunsight reproducing a variety of air and ground target attack scenarios including the tracers appropriate to the weapon simulated. It has the salient advantage of providing training on the real weapon without wear on the equipment or expenditure of ammunition. The instructor operates near the weapon used by the simulator. He can continuously monitor the target and aiming data and the firing results and can call upon a range of progressively graded training aids. A built in test facility gives immediate and precise diagnosis of all failures which can be repaired rapidly on-site. Delivery of the first series of 50 OBGS commenced at the beginning of 1984.