This unit involves the skills and knowledge required to test confined space environment to ensure safe entry and egress.In the context of this unit, a confined space is any compartment or area that has the capability of accumulating a toxic, flammable or explosive atmosphere, or of being flooded, in addition to one of the following characteristics:limited opening for accessno escape route or very restricted means of escapelimited natural ventilationatmosphere containing more than 23.5% or less than 19.5% oxygenIt includes the skills required to prepare for and conduct test procedures, and all post test procedures.This unit applies to Defence personnel involved in the testing of confined space environments as a workplace responsibility but is applicable to all individuals who work in this field. Those undertaking this unit must demonstrate the ability to work independently or as part of a team under indirect supervision. They must be able to use discretion and judgement and take responsibility for the quality of their outputs. They would perform routine tasks in a range of familiar contexts.No licensing, legislative or certification requirements apply to this unit at the time of publication.