96ec1d88-a491-4025-904a-a6cd4cb09ba1 English series series 2026-09-10T11:36:10 MEDIN 3.1.2 geoscientificInformation oceans Sedimentary structure SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Seismic reflection 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 Agreement for Lease Area The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Offshore Cable Corridor The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Elevation GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Geology GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Oceanographic geographical features 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 water column 2001-09-15T00:00:00 2001-10-19T23:59:59 1.18221415492963 1.26099093245853 51.7105268136316 51.7529100147345 0.30 9.30 TCE-473 Marine Data Exchange 2001, Titan Environmental Surveys, Gunfleet Sands 1 and 2, Geophysical Survey Geophysical Survey 2021-05-17T13:38:29 publication English Titan Environmental Surveys Limited was commissioned to undertake a geophysical survey for the purpose of assessing the seabed and shallow sub-seabed conditions prior to the installation of an offshore wind farm on Gunfleet Sands, off the coast of Essex. Principal survey activities took place between 15th September 2001 and 19th October 2001. Bathymetric data was collected over the two areas specified in the contract, the wind farm area and cable route area. The data collected was via a single frequency survey echo sounder, all the bathymetric data was corrected for the motion of the vessel. The echo sounder was calibrated each day and the calibration verified by a velocity profile obtained from a temperature/salinity profile each day. All bathymetric depths are reduced to the level of Lowest Astronomical tide (LAT). The wind farm area consists of an elongated sand bank orientate southwest-northwest. Depths observed on the bank ranged on average from 0.5m LAT in the Southwest corner, to 7.5m LAT in the northeast corner. The seabed was of a gently undulating nature and showed signs of rippling in places during the first period of data acquisition but consequent to a period of poor weather conditions these areas of ripples were then not observed during the second period of data acquisition. In the north-western corner of the wind farm area the bathymetry shows signs of ridges on the seabed. These are due to the well cemented nature of the planar and cross-bedded sands which make up the seabed at this point and their ability to maintain steep faces on eroded sections rather than slump. Geophysical data shall only be downloadable with prior permission of DONG Energy Origin: Titan Environmental Surveys Limited 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 Titan Environmental Surveys Ltd (now Gardline) environmental.web@gardline.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Orsted info@orsted.com owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-473/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 All times quoted in this report are in UTC, units of measurement refer to the metric system and all co-ordinates are referred to the Airy 1830 ellipsoid, Ordnance Survey Great Britain 1936 grid, as supplied by Hydrosearch Ltd. Positioning onboard the survey vessel was achieved using GPS techniques with the aim of achieving primary and secondary positioning to a horizontal accuracy of better than 3m. The RTK system was used as primary navigation and the General Lighthouse Authority (GLA) beacon system was used as secondary receiving corrections from North Foreland. All levels have been reduced to LAT (Lowest Astronomical Tide) using observed tides at Clacton Pier. The tide gauge was installed by Titan Environmental Surveys Ltd. and calibrated by a series of tide watches. Details of which are provided in Appendix D. LAT and Chart Datum are coincident at the survey area. The relationship between Chart Datum relative to MSL (Mean Sea Level) is –2.29m. Orsted info@orsted.com pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84