aba64100-c177-4de3-e044-0003ba6f30bd English dataset Mary Mowat British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 offshoredata@bgs.ac.uk pointOfContact 2024-03-12 MEDIN Discovery Metadata Standard Version 2.3.5 urn:ogc:def:crs:EPSG::32630 OGP 2006 Strategic Environmental Assessment SEA8 Portland Bill area Cruise Report for Emu Surveyor, SeaTrax Xplorer and MV Otter (English Channel) 2007-05-01 publication BGS_SEA_157 British Geological Survey Cruise report for Multibeam swath bathymetry, sidescan sonar and underwater video survey in the vicinity of Portland Bill as part of the Department of Trade and Industry's (now Department of Energy and Climate Change) Strategic Environmental Assessment (SEA8) . Emu Ltd was commissioned by Geotek Ltd on behalf of the DTI to perform hydrographic and ecological surveys within the vicinity of Portland Bill to further understand regional processes around a tidal headland. Survey work was required specifically to investigate the sediment processes and seabed habitats present. Paul Henni British Geological Survey (BGS) +44 (0)131 667 1000 Murchison House, West Mains Road Edinburgh EH9 3LA UK offshoredata@bgs.ac.uk custodian Department for Energy and Climate Change (DECC) +44 0300 060 4000 +44 (0) 1823 284077 Admiralty Way London SW1A 2HD UK enquiries@decc.gsi.gov.uk originator notPlanned Documents NDGO0001 Bathymetry and Elevation Seabed photography Side-scan sonar SeaDataNet Parameter Discovery Vocabulary 2024-03-12 revision Geology Habitats and biotopes GEMET - INSPIRE themes, version 1.0 2008-06-01 publication crust sediment SeaVoX Vertical Co-ordinate Coverages 2008-06-01 publication The SEAs data were produced as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme; Crown Copyright, all rights reserved. The DECC SEA must be acknowledged in any maps or publications that make use of the data. All the data files are freely available to the public. The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. BGS (NERC) has been contracted by DECC to publish SEA datasets on its behalf. All intellectual property rights (including , without limitation, copyrights, database rights and all other rights which subsist or may at any time in the future subsist in the Dataset(s)) in the Dataset(s) ('Intellectual Property Rights') are owned by DECC (formerly the Department of Trade and Industry, and the Department for Business, Enterprise and Regulatory Reform). BGS has been authorised by DECC to use SEA datasets for all purposes but on a 'not-for-profit basis'. BGS has been authorised by DECC to pass on SEA datasets to third parties so that they can use them for all purposes but on a 'not-for-profit' basis. intellectualPropertyRights 5 English environment geoscientificInformation oceans SeaVoX salt and fresh water body gazetteer 2006-01-01 revision English Channel -10 0.3 48.2 51.7 2006-09-21 2007-03-30 http://www.offshore-sea.org.uk/site/index.php http://www.bgs.ac.uk/data/sea/home.html Strategic Environmental Assessment (SEA) data portal The Strategic Environmental Assessment (SEA) data portal provides free access to available data and reports which have been produced through the UK Department of Energy and Climate Change SEA process. The site is run and managed by BGS on behalf of the Department of Energy and Climate Change (DECC). Many files can be downloaded directly from this website. Those that are too large to download can be ordered via the website for postal delivery from BGS. download dataset Emu Ltd was commissioned by Geotek Ltd on behalf of the DTI to perform hydrographic and ecological surveys within the vicinity of Portland Bill as part of the UK Department of Energy and Climate Change's Offshore Energy Strategic Environmental Assessment programme. Phase I survey work took place between 21 June and 20 October 2006 initially from the vessel Emu Surveyor. However, due to engine failure this vessel was replaced by the SeaTrax Xplorer. A combination of multibeam swath bathymetry, sidescan sonar and underwater video and grabbing techniques were planned. Bad weather and challenging sea conditions were encountered much of the time and as a result the majority of the survey effort was directed towards achieving as much multibeam and sidescan coverage as possible. Video work was limited, and no grabbing took place, during the Phase I surveys. Phase II survey work (ecological components) took place between 14.03.07 and 30.03.07 onboard the vessel MV Sea Otter. The phase II surveys collected video footage and grab samples using a 0.1m2 Hamon grab, over a total of eight days during March 2007, two of which were too rough to work safely due to sea conditions.