This unit describes the performance outcomes, skills and knowledge required to conduct an exterior search of the underwater component of a ship’s hull.It includes defining a ship’s hull search area and searching the underwater component of a ship’s hull.This unit relates, in part, to existing standards in the Australian Diver Accreditation Scheme (ADAS). All information was correct at the time of development; however, any diver seeking ADAS accreditation should consult ADAS and not rely on the information contained in this unit.This unit applies to persons working as Defence personnel with diving duties but can apply to others working as work divers.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 in a small team and perform routine 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.