This unit describes the knowledge and skills required to conduct fault finding and repairs to the simulator weapons systems including fire control, aiming and sighting systems. The unit includes analysing fault reports, identifying and rectifying faults, conducting functional tests and the documentation and certification processes. In the context of this unit, simulators are used to replicate land, air, sea and undersea systems to facilitate training and development.Simulator weapons systems include simulated cannons/guns, non-guided weapons and guided weapons. Simulator fire control systems include simulator fire control safety interlock systems, simulator armament control systems and simulator armament control buses. Simulator aiming and sighting systems include simulator helmet mounted displays, simulator head-up displays, simulator head-in displays, simulator TV sighting systems, simulator on-screen displays and simulator infrared/thermal sighting systems. This unit was developed in a Defence environment but may be relevant to others who work in this field. The skills and knowledge described in this unit must be applied within the legislative, regulatory and policy environment in which they are carried out. Organisational policies and procedures must be consulted and adhered to.Those undertaking this unit would work independently, or as part of a team, with minimal supervision, while performing complex tasks, including complex problem solving, in a limited range of contexts. They would use discretion and judgement and take responsibility for the quality of their outputs.No licensing, legislative or certification requirements apply to this unit at the time of publication.