Acknowledgements The authors are grateful to the European Commission for supporting the activities carried out in the framework of the H2020 European project ZERO BRINE (project under grant agreement No. 730390). This work also received support from the Marine Alliance for Science and Technology for Scotland pooling initiative. MASTS is funded by the Scottish Funding Council (grant reference HR09011) and contributing institutions. The authors are grateful to the Port of Rotterdam Authority for providing access to the Tender and vessel Surveyor 2, sharing necessary information and data, and providing support during the field work and especially during the survey of July 2020 performed amidst the COVID-19 pandemic. Specifically, we would like to thank Chris Schot (Constructions & Dredging Asset Manager), Ed de Boom (Planner baggerwerk), Robbert Wolf (Nature and environmental advisor), and the crew Edwin Smit, Ed Veth, Peter Mourik, Leo de Jong, and Daan Koornneef. The authors are also grateful to Rijkswaterstaat of the Dutch Ministry of Infrastructure and Water Management for providing monitoring data of the environmental quality in the Port of Rotterdam. ; Peer reviewed ; Publisher PDF