www.maritimearchaeology.com Colleague Dr. Peter B. Campbell created a free community run platform for underwater exploration. "It is meant to provide professional information to the public, while being curated by members of the field." Email: info@MaritimeArchaeology.com
www.futurelearn.com/courses/shipwrecks 'Shipwrecks & Submerged Worlds' - Free online course by the University of Southampton, England. Follow: @UoSShipwrecks & #FLShipwrecks. Visit affiliated centre: Alexandrian Centre for Maritime Archaeology & Underwater Cultural Heritage
www.ancientportsantiques.com An online catalogue of Ancient Ports and Harbours by Arthur de Graauw , based on ancient & modern authors, and archaeology. You can also download the geodatabase here (.xlsx).
www.pleiades.stoa.org A community-built gazetteer and graph of ancient places. Alongside this platform also check out, for example: