6c7d21ab-40e9-4ca6-ad18-2eedf2ea824f English series series 2026-07-20T08:43:13 MEDIN 3.1.2 biota 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 Research The Crown Estate Renewable Energy Development Phases 2012-05-15 revision Research and Development Activity The Crown Estate Renewable Energy Development Areas 2012-05-15 revision Orthoimagery GEMET - INSPIRE themes, version 1.0 2009-07-31 revision SeaVoX Vertical Co-ordinate Coverages 2020-05-21 revision troposphere 2009-05-01T00:00:00 2009-05-01T00:00:00 -9.33312855790775 2.68743327033997 49.0399981037863 60.7672028638749 TCE-256 Marine Data Exchange 2009, BTO, COWRIE Research, A Review of Assessment Methodologies for Offshore Windfarms A Review of Assessment Methodologies for Offshore Windfarms 2009-01-01T00:00:00 creation 2021-05-17T13:33:51 publication English COWRIE previously published guidelines for ship and aerial survey of marine birds for offshore windfarm assessments (Camphuysen et al. 2004). The purposes of the current review are fourfold: a. to assess the extent to which these recommendations have been followed; b. to identify any differences in interpretation of the guidance between sites; c. to test the practicalities of using high definition cameras during aerial surveys; d. to provide more rigorous guidelines for the type of analytical techniques that should be used. The BTO and COWRIE undertook a desk based study using datasets obtained from previous COWRIE surveys. 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 Dr Ilya Maclean British Trust for Ornithology +44 (0)1842 750050 ilya.maclean@bto.org originator The Crown Estate +44 020 7851 5000 enquiries@thecrownestate.co.uk distributor COWRIE Ltd cowrie@offshorewind.co.uk owner unknown Documents https://www.marinedataexchange.co.uk/details/TCE-256/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 aim of this report is to review the assessments carried out for Round 1 and Round 2 windfarm applications, as well as other recent developments in the monitoring and assessment of bird numbers at offshore sites, in order to provide further recommendations for carrying out ornithological impact assessments. The specific objectives of the review are as follows: • Review the potential value of high definition cameras to collect suitable data from aerial bird surveys, and make recommendations on the potential usage and effectiveness of this emerging technique. A Review of Assessment Methodologies for Offshore Windfarms 1 5 • Compare the aerial and boat-based survey methods used for Round 1 and Round 2 windfarm applications to those recommended in Camphuysen et al. (2004), in order to determine whether the range of methods recommended in Camphuysen et al. (2004) are being used appropriately. • Based on the results of the review, identify whether the Camphuysen et al. (2004) recommendations can be refined, or whether there are potential areas for improvement in the interpretation of the Camphuysen et al. (2004) guidance. • Review the analysis of aerial and boat-based bird survey data used for Round 1 and Round 2 windfarm applications and identify value of methods used. • Based on the data analysis review, recommend the most appropriate methods of data analysis and presentation. Dr Ilya Maclean Project Manager 01842 750050 ilya.maclean@bto.org pointOfContact EPSG Geodetic Parameter Registry 2022-11-29 revision WGS 84