d7ad6fb2-b188-44ec-b276-95a3a90eae96 English series series 2026-08-14T13:36:44 MEDIN 3.1.2 environment geoscientificInformation oceans Concentration of other organic contaminants in sediment samples SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Seismic reflection SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Seismic refraction SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Magnetics SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Consenting 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 Soil GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaDataNet sea areas 2012-11-07 revision English Channel SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision soil and sediment SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2007-03-15T00:00:00 2007-06-14T23:00:00 1.185 1.298 51.69 51.75 TCE-552 Marine Data Exchange 2007, Osiris Projects, Gunfleet Sands 1 and 2, Additional Geophysical Surveys Additional Geophysical Surveys 2021-05-17T13:39:40 publication English On the instructions of Dong Energy, Osiris Projects were commissioned to carry out additional survey and sampling works across the Gunfleet 1 and Gunfleet II offshore wind farm sites in the outer Thames estuary, in order to supplement existing data sets collected during previous surveys carried out during 2001 and 2005. Supplemental bathymetric surveys were carried out in order to provide a comprehensive overview of bed levels within the extents of the consented Gunfleet Sands wind farm development area. This data is to be used for comparison with existing survey data in order to provide up-to date information on sediment movement across the area and also to assist in the detailed design and construction of the wind turbine installations and cable burial. 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 Osiris Projects +44 (0)151 328 1120 enquiries@osirisprojects.co.uk originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Orsted info@orsted.com owner notPlanned Delimited Documents https://www.marinedataexchange.co.uk/details/TCE-552/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 Geophysical survey lines were run at 20m centres, in a NE – SW orientation, with cross lines perpendicular to these at 250m centres. All lines were run using multi-beam echo sounder, side scan sonar, sub-bottom profiling and magnetic gradiometer techniques. A series of grab samples were taken across the survey area, using a 0.1m² Day Grab, at selected locations, provided by the Client. These were sent to the Centre for Marine and Coastal Studies (CMACS) Limited laboratory in Birkenhead for benthic, contaminant and particle size analyses. The results of these tests lay outside of the remit of this report and are to be produced, under separate cover, by CMACS. Finally, a series of potential unexploded ordnance targets were investigated using a SeaEye ‘Falcon’ ROV. This unit was equipped with a Kongsberg 1071, 675 kHz sonar head and later with a Kongsberg 3000, 2.25 MHz sonar head, in order to provide high definition images of the potential UXO targets. Drop-down video investigations were also undertaken at selected sites, but water visibility was found to be very poor. Orsted Data Manager info@orsted.com pointOfContact EPSG Geodetic Parameter Registry 2022-12-12 revision WGS 84 / UTM zone 31N