This unit describes the performance outcomes, skills and knowledge required to use hand tools in an underwater environment.It includes preparing appropriate hand tools for work task and inspecting them for serviceability, prior to, during and post activity, ensuring tools are secured on own body throughout dive, employing tools during work task, recovering waste arising from work task, maintaining and storing tools for ongoing use.This unit relates, in part, to existing standards in the Australian Diver Accreditation Scheme (ADAS).This unit applies to persons working as Defence divers but is applicable to all individuals 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, dive plan and procedures must be consulted and adhered to.Persons undertaking this unit work independently and perform specific tasks in a range of contexts that could be unpredictable.No licensing, legislative or certification requirements apply to this unit at the time of publication.