24bc5bca-6b48-4fec-82ef-3c6ec46fc997 English series series The Crown Estate The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk pointOfContact 2025-09-01 MEDIN 3.1.2 EPSG Geodetic Parameter Registry 2021-01-06 revision ETRS89 / UTM zone 31N 2023 N-SEA, Vattenfall, Norfolk Boreas, Vanguard, Geophysical survey of 8 extension blocks on the ECR 2025-10-01 publication 2025-09-01 creation MDE-TCE-228-4328 MDE N-Sea Geophysical survey of 8 extension blocks on the Export Cable Route in the offshore Norfolk Boreas and Vangard Areas of the Export Cable Route containing Preliminary data MBES, MAG, SBP and EVT data Operational reports for the vessels used. The aim is to Supplement existing survey data from various sources to provide a broad understanding of the geophysical conditions within the survey areas Obtain accurate bathymetry, locate all obstructions and identify other seabed factors which may affect the installation of the wind turbines, offshore substation, subsea cables and any other associated equipment. Carry out a geophysical survey within the survey area to define the shallow sub-seabed geology across the cable route corridor for macro-routing purposes. Vessels used GeoFocus and GeoRanger Lottie Sharp RWE SI Package Manager lottie.sharp@rwe.com owner The Crown Estate The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian N-Sea NSea info@n-sea.com originator The Crown Estate The Crown Estate +44 020 7851 5000 enquiries@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 Acoustic noise in the water column Active seismic refraction Bathymetry and Elevation Gravity Magnetics Optical backscatter Seismic reflection Side-scan sonar Sound velocity and travel time in the water column 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 geoscientificInformation oceans 0.84961116313934 2.3437517881393 52.655560904462 53.639481168621 SeaVox salt and freshwater body gazetteer 2021-01-06 creation North Sea 2023-02-11 2024-10-16 SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision soil and sediment boundary layer SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision water column SeaVoX Vertical Co-ordinate Coverages 2021-01-06 revision water column boundary layer Documents rev2 Database https://www.marinedataexchange.co.uk/ Link to MDE 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 Survey Data collected using 2 vessels The Geo Focus is a DP1 Class I hybrid survey vessel managed by Geo Plus. N-Sea has the vessel on a long-term charter and upgraded the available sensors to the latest standards. MultiBeam Echo Sounder, Side scan sonar, Magnetometer,sub bottom profiler. The Geo Ranger 41 m long DP Class I hybrid survey and ROV support vessel with vessel-mounted USBL and MBES, as well as other geophysical survey, sediment sampling and seabed imagery equipment depending on project requirements Once all equipment had been installed and interfaced a series of verifications and calibrations took take place while the vessel remains alongside. Nsea issued operation and result reports for Vattenfall in December 2023 .