82526934-cbbc-4f25-84ef-0adcce9a0521 English series series 2026-03-18T11:19:07 MEDIN 3.1.2 biota Cetacean behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Seal behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Fish behaviour SeaDataNet Parameter Discovery Vocabulary 2023-12-12 revision Post-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 Production and industrial facilities 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 bathybenthic SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision water column 2014-07-29T00:00:00 2014-07-29T23:00:00 1.07 1.31 51.63 51.778 TCE-566 Marine Data Exchange 2014, Subacoustech Environmental, Gunfleet Sands 3, Monitoring and Assessment of Operational Subsea Noise Monitoring and Assessment of Operational Subsea Noise 2021-05-17T13:39:55 publication English Subacoustech Environmental Ltd has undertaken measurements of underwater noise at Gunfleet Sands 3 Demonstrator Wind Farm whilst the turbines were operational. Background noise measurements were undertaken in March 2013 prior to the operational phase of the wind farm. On 29th and 30th July 2014, underwater noise measurements were taken along transects extending away from the operational turbines. The measured data have been analysed and presented herein and shows that there has been negligible increase in the sound pressure levels compared to the levels measured prior to the turbines being made operational. 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 Subacoustech Environmental Ltd. +44 (0)1489 892 881 adam.collett@subacoustech.com originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor Orsted Customer-questions@orsted.com owner notPlanned Delimited Documents https://www.marinedataexchange.co.uk/details/TCE-566/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 This survey represents DONG Deliverable 731. The operational underwater noise survey at Gunfleet Sands 3 site was undertaken on 29th and 30th July 2014. The survey was undertaken from a boat, Sophie Lea, which was boarded in Brightlingsea harbour on each day before heading out to the Gunfleet Sands wind farm site. All underwater sound vessel based measurements conducted as part of this study were undertaken using a Brüel and Kjær Type 8106 low noise hydrophone, which is able to measure underwater sound to levels well below sea state zero noise. Measurements were taken on transects with the turbine as an end-point, either travelling towards or away from the turbine. A summary of the ranges of measurements, the start time and tidal state for each transect undertaken on Day 1 and 2 of the operational noise survey are shown in Table 3-2 and Table 3-3, respectively. The wind speed and direction and sea state over each day is also included in the tables. On Day 1 measurements were taken along four transects. On Day 2 measurements were taken along six transects. It should be noted that divers were working during slack water on both days of the survey. Dive support vessels were anchored and measurements were taken when engines were switched off. Measurements close to the turbines on some transects were limited due to the vessels’ anchor lines. This limited efforts to determine the source level and the sound pressure levels in the near field. However, measurements were taken as close as 30 m from an operational turbine on 30th July 2014. ABP Marine Environmental Research Ltd 02380711840 enquiries@abpmer.co.uk pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84