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Based within the University of the Highlands and Islands Archaeology Institute in Kirkwall, Orkney, the Orkney Research Centre for Archaeology (ORCA) offers a comprehensive range of terrestrial and marine archaeological and historic environment services across Scotland, such as impact assessments, archaeological fieldwork and post-excavation, built heritage services, environmental archaeology, marine archaeology, and archaeological sciences. Alongside commercial and public sector work and community outreach programmes, our research and applied research projects include the well-publicised work on the Ness of Brodgar; the Heart of Neolithic Orkney World Heritage Site Geophysics Programme; Scapa Flow shipwrecks; and mapping marine heritage sites in northern waters