This unit describes the skills required to operate the simulator for testing purposes following maintenance. The unit includes identifying the testing requirement, conducting the test and analysing the results, 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.Testing includes particular component tests or complete simulator operational tests. The simulator components include the complete simulator or, power distribution and control systems, computers and peripheral hardware, image generator and visual display systems, motion and control loading systems, sound systems and weapons systems. The outcomes of the test include immediate fault finding and repair or scheduling the simulator for routine maintenance. 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.