2023, Anatec, Outer Dowsing, ORCP, Marine Traffic and AIS Survey, Summer series https://portal.medin.org.uk/portal/start.php?tpc=010_f15808728609e87a6c628c767ce4502c This report presents analysis of the summer 2023 vessel-based traffic survey which has been undertaken from the survey vessel Karima between the 14th and 28th June 2023. The data was gathered for a study area surrounding the search area for the proposed Reactive Compensation Station (RCS) (hereafter the Search Area) for the proposed Outer Dowsing Offshore Wind Farm (OWF). The primary objective of the survey was to identify and validate the routeing of vessels and the level of vessel activity within a 5 nautical mile (nm) buffer (the Study Area) around the Search Area. This was achieved by recording, in real time, the positions of vessels within range of the Automatic Identification System (AIS) receiver and Automatic Radar Plotting Aid (ARPA), supplemented by observation of vessels within visual range to obtain information on vessel identity, type and size where the information was not available from AIS. This survey supplements a previous survey undertaken in January 2023 to ensure full compliance with Marine Guidance Note (MGN) 654 (Maritime and Coastguard Agency (MCA), 2021), which requires a minimum of 28 days seasonally-weighted data comprising AIS, Radio Detection and Ranging (Radar) and visual observations. 20230801