302e9c08-f7ce-4428-9ad7-2364bc7f731d English series series 2026-08-12T13:46:41 MEDIN 3.1.2 oceans Bathymetry and Elevation SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Feasibility The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Pre-Construction engineering 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 Irish Sea and St. George's Channel SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision soil and sediment boundary layer 2003-01-31T00:00:00 2003-02-12T23:59:59 -3.48021866047141 -3.41364681654179 53.4030226951271 53.4310568920665 TCE-1690 Marine Data Exchange 2003, Celtic Wind Technology, North Hoyle, Phase 2 Bathymetric Survey Phase 2 Bathymetric Survey 2023-10-02T16:17:42 publication English On the instructions of Vestas Wind Systems - Celtic Wind Technology Limited, Exploration associates carried out a survey of a 4000 by 1500m wide area over North Hoyle Bank, off the North Wales coast, for the purposes of designing and installing an offshore wind farm. Line spacing was set at 250m running parallel and perpendicular to the outline orientation of the windfarm. The objective of the survey was to evaluate global seabed movements during the winter months by providing a direct comparison of seabed levels with a previous survey conducted in July 2002 by Exploration Associates. This was achieved by carrying out a bathymetric survey utilising a dual frequency echo sounder. Survey work was conducted between 31st January 2003 and 12th February 2003 with seven full days being lost due to adverse weather conditions. 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 Celtic Wind Technology celtic@vestas.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor RWE support@rwe.com owner notPlanned Geographic Information System Text or Plaintext https://www.marinedataexchange.co.uk/details/TCE-1690/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 The North Hoyle Offshore Windfarm is the first of the UK's Round 1 wind farms. Due to the wind farm pre-dating the data clauses which The Crown Estate insert into all offshore windfarm leases, the offshore wind farm developer had no obligation to provide survey data to The Crown Estate. However, despite this, The Crown Estate are pleased to have worked with Innogy and Greencoat Capital to retrieve as much of the historical data as possible. All of the retrievable data can now be found on the MDE. Please see further details in the metadata lineage. The methodology involved vessel-based operations using advanced equipment such as the Leica SR530 GNSS/RTK GPS, Knudsen 320M Dual Frequency Echo Sounder, TSS HS50 Heave Sensor, and Trimble/HYDROpro navigation and positioning software, supplemented by regular calibrations and tide measurements via GPS and tide gauge. Despite occasional disruptions due to weather, the survey found a general northerly deepening of the seabed, stability of the sand bank at the specified grid reference, and no significant topographical changes compared to the previous survey. Equipment and system performance were assessed as reliable and accurate, and the survey recommends ongoing seabed monitoring and continued use of the specified technologies for effective hydrographic survey and construction support. No safety incidents were recorded. ABPmer +44 (0)23 8071 1840 enquiries@abpmer.co.uk pointOfContact EPSG Geodetic Parameter Registry 2021-03-18 revision OSGB36 / British National Grid EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84