5f6b3bb9876b8cc0f389bba2f7d940c2 English series The Crown Estate Marine Data Advisor +44 020 7851 5000 1 St James's Market London SW1Y 4AH enquiries@thecrownestate.co.uk pointOfContact 2023-06-23 MEDIN Discovery metadata standard 2.3.8 urn:ogc:def:crs:EPSG::4258 2022, EGS International Ltd., The Crown Estate Data Collection, Geophysical Survey of Proposed Dredging Areas in the Thames Estuary 2022-07-29 publication 2022-03-03 creation 2022-07-29 revision MDE-175-3698 http://https://www.marinedataexchange.co.uk This survey work involved bathymetric and geophysical data acquisition along individual pre-planned lines over proposed dredging areas identified by The Crown Estate in the Thames Estuary region.The objectives of the survey are to acquire high-quality bathymetric and geophysical data aimed at producing an assessment of sand and gravel resources. The survey scope includes Multi-Beam Echo sounder (MBES), Side-Scan Sonar (SSS), Sub-Bottom Profiler (SBP), and Single-Channel Ultra-high resolution seismic (S-UHRS) surveys. Manager Project EGS (International) Ltd dassh.enquiries@mba.ac.uk originator The Crown Estate +44 020 7851 5000 1 St James's Market London SW1Y 4AH enquiries@thecrownestate.co.uk custodian continual Database Documents Marine Environmental Data and Information Network Bathymetry and Elevation Sedimentary structure Two-dimensional seismic reflection Side-scan sonar Seismic refraction Seismic reflection SeaDataNet P021 parameter discovery vocabulary 2009-11-16 revision Research Research and Development otherRestrictions Publicly Available https://www.marinedataexchange.co.uk/content/info/terms-of-use 0.5 eng elevation geoscientificInformation imageryBaseMapsEarthCover inlandWaters International Hydrographic Bureau, Limits of Oceans and Seas 1954-01-01 creation North Sea SeaDataNet vertical extent keywords 2010-01-01 revision soil and sediment SeaDataNet vertical extent keywords 2010-01-01 revision soil and sediment boundary layer 1.5750 2.6940 51.3960 52.1320 2022-03-03 2022-03-18 https://www.marinedataexchange.co.uk/details/3698/summary A link to the web service or dataset. https://www.marinedataexchange.co.uk A link to the general host site. series The alongside mobilisation began onboard the EGS Ventus on the 23th February 2022 in Shoreham Port, Sussex, UK, with the vessel slipping ropes on the 27th February to carry out the offshore calibrations and verifications programme just off Shoreham. These were successfully completed on the 1st of March with the vessel then transiting directly to the first target area (English Channel) where survey operations commenced later the same day. The Ventus then progressed through the target areas moving north, competing the planned work in the English Channel and Thames Estuary (except for a section of line TE_L9) before transiting to the East Coast area. While working in the East Coast area, the weather conditions forced the vessel to briefly seek shelter in Great Yarmouth, where a partial crew change took place on the 8th March. Survey operations were resumed later the same day and all the planned lines were completed on the 13th March, with the vessel transiting north again to commence work in the Humber area. Survey operations in the Humber area were completed on the 16th March, with the vessel starting the return transit late in the day. During the transit south, two additional lines requested by the Client, one in the East Coast area and one in the Thames Estuary area were completed together with the remaining section of line TE_L9 The Ventus arrived back in Shoreham late on the 18th March, after having successfully recovered while on its way to port the beacons used for the initial calibration at the start of the project. The demobilisation was immediately started and completed the next day (19 th March), with all the survey personnel leaving site at noon. Full details of survey operations are provided in the Operational Report included here as Appendix A – Operational Report.