fadf44cb-3fed-41b7-89e8-a41cb2a83290 English series series The Crown Estate +44 020 7851 5000 mde@thecrownestate.co.uk pointOfContact 2025-09-01 MEDIN 3.1.2 EPSG Geodetic Parameter Registry 2021-01-06 revision WGS 84 2023-2025, Sea Mammal Research Unit Consulting (SMRU Consulting), Hornsea Project Two, Improving cetacean Density Estimation from Digital Aerial Surveys (IDEAS) 2025-09-01 publication 2025-03-21 revision 2025-03-21 creation MDE-TCE-59-4322 This Final Report documents the activities undertaken towards executing the Plan for Marine Mammal Monitoring required under condition 8 (2)(h) of the Hornsea Project Two Offshore Wind Farm (Hornsea Project Two) deemed Marine Licences (dMLs). Agreement on the nature of these monitoring activities and their fulfilment of relevant dML conditions was reached in April 2020 with the Marine Management Organisation (MMO), in consultation with Natural England. It is noted that the Hornsea Project Two Plan for Marine Mammal Monitoring was focused on providing a strategic post-construction analysis of existing data to address uncertainties inherent with marine mammal monitoring data collection. The Plan did not include pre-construction or site-specific monitoring. SMRU Consulting were contracted by Ørsted to deliver a project to satisfy Hornsea Project Twos Plan for Marine Mammal Monitoring. This commenced with a scoping phase to identify appropriate datasets, develop an approach to addressing the objectives of the plan, specify deliverables, develop a budget and timeline, and form a Project Review Group (PRG). The scoping phase culminated in a detailed Scope of Work (SoW) document, finalised in January 2022. The project subsequently commenced in May 2022 with the title “Improving cetacean Density Estimation from digital Aerial Surveys” (IDEAS) and this Final Report represents the primary output from the IDEAS project. The Crown Estate +44 020 7851 5000 mde@thecrownestate.co.uk owner The Crown Estate +44 020 7851 5000 mde@thecrownestate.co.uk custodian The Crown Estate +44 020 7851 5000 mde@thecrownestate.co.uk originator The Crown Estate +44 020 7851 5000 mde@thecrownestate.co.uk distributor notPlanned Marine Environmental Data and Information Network MEDIN metadata record availability 2025-09-01 revision Sea regions GEMET - INSPIRE themes, version 1.0 2021-09-28 revision Cetacean abundance Cetacean behaviour SeaDataNet Parameter Discovery Vocabulary 2021-09-28 revision otherRestrictions No Limitations when published on the MDE otherRestrictions Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use English 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 biota oceans -9.20654296875 3.44970703125 49.6885106606 57.627390486831 SeaVox salt and freshwater body gazetteer 2021-01-06 creation Celtic Sea SeaVox salt and freshwater body gazetteer 2021-01-06 creation English Channel SeaVox salt and freshwater body gazetteer 2021-01-06 creation Irish Sea SeaVox salt and freshwater body gazetteer 2021-01-06 creation Menai Strait SeaVox salt and freshwater body gazetteer 2021-01-06 creation North Sea 2024-09-19 2025-03-18 SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision water column Database https://www.marinedataexchange.co.uk/details/TCE-4322/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. series Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication Not Required in Project or MDE false This Final Report documents the activities undertaken towards executing the Plan for Marine Mammal Monitoring required under condition 8 (2)(h) of the Hornsea Project Two Offshore Wind Farm (Hornsea Project Two) deemed Marine Licences (dMLs). Agreement on the nature of these monitoring activities and their fulfilment of relevant dML conditions was reached in April 2020 with the Marine Management Organisation (MMO), in consultation with Natural England. It is noted that the Hornsea Project Two Plan for Marine Mammal Monitoring was focused on providing a strategic post-construction analysis of existing data to address uncertainties inherent with marine mammal monitoring data collection. The Plan did not include pre-construction or site-specific monitoring. SMRU Consulting were contracted by Ørsted to deliver a project to satisfy Hornsea Project Twos Plan for Marine Mammal Monitoring. This commenced with a scoping phase to identify appropriate datasets, develop an approach to addressing the objectives of the plan, specify deliverables, develop a budget and timeline, and form a Project Review Group (PRG). The scoping phase culminated in a detailed Scope of Work (SoW) document, finalised in January 2022. The project subsequently commenced in May 2022 with the title “Improving cetacean Density Estimation from digital Aerial Surveys” (IDEAS) and this Final Report represents the primary output from the IDEAS project.