6e0e2c9c-429a-48e2-8ae8-d4bc7077ed6b English series series 2026-03-24T16:05:00 MEDIN 3.1.2 oceans Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Renewable Energy Lease area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Cable crossing The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision 2015-11-05T00:00:00 2015-11-11T23:59:59 1.0327 1.1424 51.373278 51.473833 TCE-840 Marine Data Exchange 2015, Spectrum Geosurvey, Kentish Flats Extension, Geophysical Survey Geophysical Survey 2023-03-06T15:28:17 publication English Spectrum Geosurvey Limited was contracted by Vattenfall Wind Power Limited to perform a post construction survey on the Kentish Flats Extension offshore wind farm. The primary requirement was to acquire multibeam bathymetry and backscatter data along the Kentish Flats Extension export cables, inter-array cables and surrounding the fifteen wind turbine generators. Multibeam bathymetry and backscatter data were acquired on board the survey / crew transfer vessel “Spectrum 1” between the 5th – 11th November 2015. All survey specifications were met and a total of 159 seabed targets larger than 0.5m in any dimension were subsequently identified. All reporting for this survey is contained entirely within this document. The following conclusions were reached following the survey operations and subsequent analysis:  159 seabed features have been identified within the survey area.  No cable exposures are evident along the export cables and inter array cables.  The largest shoaling and deepening differences associated with cable installation works between the 2015 Q4 and 2014 Q2 data were +1.15m (mattressing over LAL HV4 & KFE export cable Y2) and -0.8 m (trenching north of HV1 on export cable X4) respectively.  The largest shoaling and deepening differences associated with spud can footprints are found between the 2015 Q4 and 2014 Q2 data were +0.95m (KFE WTG 05) and -3.15 m (KFE WTG 05) respectively.  No significant changes were observed over the LAL/KF1 rock berms. There will be no limitations when published on the Marine Data Exchange 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 otherRestrictions The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk custodian Spectrum Geosurvey info@spectrum-offshore.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Vattenfall Wind Power Ltd MDE@vattenfall.com owner asNeeded Binary Delimited Geographic Information System https://www.marinedataexchange.co.uk/details/TCE-840/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. 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 2010-12-08T00:00:00 publication Conformity with the Commission Regulation (EU) No 1089/2010 was either not relevant to this dataset or not a requirement of the Marine Data Exchange for the creation and submission of this dataset; therefore, conformity has not been assessed and cannot be declared False series During the survey operation position quality indicators were monitored and recorded to ensure consistently accurate results. Primary navigation was provided by the Applanix POS-MV decoded DGPS corrections and this system performed to a high standard throughout. Height standard deviation and GPS position mode alarms alerted the operator if the position quality deteriorated below acceptable levels. The multibeam echosounder tuning was continually adjusted to ensure an optimum balance of coverage, feature detection, sounding density and noise reduction. An online grid of raw bathymetry and sounding density was monitored to ensure that the project requirements were being met. Vattenfall MDE@vattenfall.com pointOfContact EPSG Geodetic Parameter Registry 2024-06-17 revision ETRS89 / UTM zone 31N