bc01a025-f66e-4236-ab25-4863eda07bca English series series 2026-08-11T13:53:12 MEDIN 3.1.2 geoscientificInformation oceans Hazards to navigation SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Geotechnics SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision 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 Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaDataNet sea areas 2012-11-07 revision North Sea SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision soil and sediment boundary layer 2007-03-20T00:00:00 2007-05-10T00:00:00 0.429574612037093 0.490668789094874 53.1235139054851 53.2139573121939 TCE-1067 Marine Data Exchange 2007, Fugro, Lynn and Inner Dowsing, Side-scan Sonar Debris Clearance Survey Side-scan Sonar Debris Clearance Survey 2021-05-17T13:50:07 publication English This report contains the operation details and results of the Lynn and Inner Dowsing Windfarm Mono Pile Foundation pre-construction side scan sonar debris clearance survey carried out for MT Højgaard A/S commisioned by Centrica. The fieldwork was undertaken between the 20th March and the 10th May 2007 by Fugro Survey Limited, using the M/V Genesis. Work consisted of a SSS survey to determine any seabed contacts within an area encompassing all 60 proposed monopile locations for the Lynn and Inner Dowsing Windfarm. It was proposed that lines are performed nominally every 40 metres in the mainline orientation withcross lines nominally every 200 metres. Mainlines are also run 20 metres offset from each monopile location with a cross-line again offset by 20 metres from each location. The Service Warranty in Appendix E outlines the limitations of this report. 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 Fugro Survey Limited https://www.fugro.com/contact originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor XceCo Limited ask@xceco.co.uk owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-1067/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 A GeoAcoustics SS941 transceiver with a GeoAcoustics 159D dual frequency tow fish was utilised for the acquisition of side scan sonar data. The system consists of a towed underwater fish which sends out short high frequency, high intensity, sound waves beamed from either side in a direction perpendicular to the direction of travel. The acoustic beam is narrow in the horizontal plane, yet sufficiently broad in the vertical plane for the transducers to receive echoes from the seabed. These echoes, once detected by the transducers, are sent via the tow cable to the deck unit, which electronically processes the signals and prints them line by line to produce the sonar image on the recorder. For the purposes of this survey, the high frequency 500 kHz transducers were used and the system set to 50 metres per channel, which provided a coverage width of 100 metres centred on each survey line. The data were further enhanced by the use of a CODA processing system with all data recorded digitally to enable further processing, should it be required. The recorded data is annotated at every fix, with fix number and grid co-ordinates. The Crown Estate enquiries@thecrownestate.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-12-12 revision WGS 84 / UTM zone 31N