5b294737-0530-4192-a1d0-734e3ab8d353 English series series 2026-07-31T15:06:45 MEDIN 3.1.2 biota oceans Bird counts SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Bird behaviour SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Bird taxonomy-related abundance per unit area of surface SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Cetacean abundance SeaDataNet Parameter Discovery Vocabulary 2026-06-19 revision Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Post-Construction monitoring The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Pre-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 Atmospheric conditions GEMET - INSPIRE themes, version 1.0 2009-07-31 revision Species distribution 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 skin SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision atmosphere 2004-04-01T00:00:00 2015-08-31T00:00:00 1.85 2 51.72 51.98 TCE-3524 Marine Data Exchange 2004-2015, RHDHV, ESS and BioSS, Greater Gabbard, Ornithological Monitoring Report Ornithological Monitoring Report 2024-04-02T08:44:39 publication 2016-12-19T00:00:00 revision English As the final report for the ornithological monitoring programme at Greater Gabbard Offshore Wind Farm (GGOWF), this report provides the collation, analysis and presentation of the full survey data from the monitoring programme. The monitoring programme covers the period from April 2004 to August 2015 and encompasses preconstruction, construction and post-construction periods of the wind farm development (with a break in survey coverage from May 2006 to May 2008). The findings reported here are intended to meet the ornithological monitoring objectives of the Marine Licence. These findings supersede those presented in previous annual reports for the GGOWF monitoring programme. 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 Royal Haskoning (UK Head Office) Data Officer +44 (0)1733 334455 dassh.enquiries@mba.ac.uk originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor RWE Renewables UK Swindon Limited support@rwe.com owner notPlanned Documents https://www.marinedataexchange.co.uk/details/TCE-3524/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 Surveys were undertaken following standard methods (Komdeur et al. 1992, Camphuysen et al. 2004). Thus, parallel transect routes were followed (Figure 4.2) using a vessel that met the recommendations of COWRIE for speed (5 – 15 knots),length (20 – 100m)2 and height of viewing platform (5 – 25m). Survey vessels were fitted with a Differential Global Position System (DGPS) and appropriate equipment to enable automated logging of the vessel’s position at 30 second intervals. A minimum of three surveyors were present on all surveys, to enable rotation of duties and to ensure that observer fatigue was minimised. On some surveys one additional surveyor was available to observe migratory species (in spring and autumn) and/or to undertake continual forward scanning to detect birds that were flushed from the sea surface. The times recorded on the surveyors’ watches were synchronised with the vessel’s DGPS (as well as hand-held back-up GPS units) prior to the start of each survey. Counts and associated observations were made for all species recorded during the surveys. For birds on the water, records were assigned to standard distance bands (as estimated by eye with the aid of a measuring stick as per Komdeur 1992) out from the strip transect - i.e. 0 – 50m, 50 – 100m, 100 – 200m, 200 – 300m and >300m (Camphuysen et al. 2004). These counts were conducted by two observers each operating on different sides of the vessel, with a 90o scan on each side. Only the records from the first four distance bands were used in subsequent analyses to estimate the densities of birds on the water (see Section 4.2). For birds in flight, numbers were recorded within ‘snapshots’ (Komdeur et al. 1992, Camphuysen et al. 2004). ‘Snapshot’ counts involved splitting the time ‘in transect’ into one-minute intervals, and each observer recording the numbers of each species observed in flight over a 300m x 300m square (within a combined 180o scan) at the end of each interval. To account for effects of variation in boat speed on the coverage by the ‘snapshot’ counts, the actual time the vessel spent in each reporting region was calculated and used to estimate the number of ‘snapshot’ samples recorded within each reporting region on each survey. This ensured that area sampled by the ‘snapshots’ was correctly scaled. In addition to recording the numbers of each bird species, flight height and direction and other general behaviour (e.g. foraging) were recorded during surveys. As for the distance bands for birds on the water, flight heights were estimated by eye, assigning each bird in flight to the nearest 5m height band. Flight heights considered to be more than 40m above sea level (asl) were not differentiated in surveys before February 2009, but subsequently were estimated to the nearest 10m. Following the installation of WTGs (with the first 104 installed between June 2010 and April 2011), surveyors were able to visually calibrate their flight height estimates against WTG features of known height. It is possible that this may have led to increased accuracy of flight height estimation compared to the pre-construction surveys. SSE Renewables SSE Renewables dassh.enquiries@mba.ac.uk pointOfContact EPSG Geodetic Parameter Registry 2022-12-12 revision WGS 84 / UTM zone 31N