Keyword

Side-scan sonar

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  • This geophysical and multibeam survey took place in March/April 2006 in the Bristol Channel on board the MV Confidante. It was carried out by Gardline under contract to British Geological Survey (BGS) and Geotek Ltd. It was co-funded by UK Department of Trade and Industry for their Strategic Environmental Assessment Programme (SEA8) and NERC/BGS for their marine mapping programme. The objective was to collect data for investigations of sediment mobility and for monitoring sea bed morphology and sea bed sediment texture. Seafloor bathymetry data were collected using an EM3000 multibeam system and Edgetech 4200FS sidescan sonar. Sub-bottom seismic profiling data were collected using a surface tow boomer. These data were recorded digitally and are archived by BGS. Technical details of the survey are contained in Gardline Report 6749, the BGS cruise report and preliminary geological interpretation are contained in BGS Report CR/06/085. See the Offshore GeoIndex SEA layers and the SEA Portal https://www.bgs.ac.uk/data/sea/app/search.

  • The JNCC marine survey took place in May 2008 within the Submarine structures in the mid-Irish Sea Area of Search (AoS) and the Solan Bank AoS on board the RV CEFAS Endeavour. The aim was identifying habitats listed under Annex I of the EC Habitats Directive; primarily Submarine structures made by leaking gases in the former AoS and Reef habitat in the latter. Multibeam bathymetry was collected using a Kongsberg EM3000D system and sidescan sonar data which was collected using a Benthos SIS 1624 sidescan sonar. Ground-truthing techniques included towed & drop down video/stills and Hamon grab sampling. Rock dredge sampling was also used on a few stations to gather samples of epibiota from hard substrata to assist with the taxonomic ID of the video & still images. The geology and geophysics component of the data are archived at the British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Biological and bathymetry data are archived at DASSH and UKHO respectively. For more information see http://jncc.defra.gov.uk/page-4732. Technical details of the survey are contained in JNCC report No. 430, http://jncc.defra.gov.uk/page-5347 and BGS subsample analysis report CR/09/51. JNCC Contract No: F90-01-1200.

  • Wessex Archaeology was commissioned by Historic Scotland to undertake a geophysical survey of the Designated Sites of the Blessing of Burntisland, HMS Campania: designated wreck sites located within the Firth of Forth, Scotland. The work was undertaken as part of the contract for Archaeological Services in Relation to the Protection of Wrecks Act (1973). Wessex Archaeology survey operations took place between 2nd and 6th August 2004. All surveying took place off the survey vessel owned and operated by St Andrews University. This is Crown Copyright Data collected and processed by Wessex Archaeology. The geophysical survey included the use of sidescan sonar and sub bottom profiler. The geology and geophysics component of the data are archived at British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Data were also provided to other archive centres as appropriate.

  • This geophysical survey has been carried out by, British Geological Survey (BGS), the survey took place in July 1991 in the North Sea on board the RRS Challenger. The purpose was to collect data to investigate gas-leakage phenomena from pockmarks in the North Sea. Sea floor data were collected using Sidescan Sonar. Sub-bottom profiling data were collected using Deep Tow Boomer. These data were recorded digitally and are archived by BGS.

  • Wessex Archaeology (WA) was commissioned by Cadw to acquire, process and interpret marine geophysical data over a number of known and suspected wreck site locations off the coast of Wales. This survey was conducted under the Protection of Wrecks Act (1973) contract and the data is Crown Copyright©. The data were acquired and processed by Wessex Archaeology. The marine geophysical surveys targeted a total of nine suspected wreck locations in Milford Haven area, off the coast of South Wales, seven of which represent the locations for the remains of 19th century Welsh vessels associated with the coal mining industry. Additional survey data were acquired over two 20th century sites within the Milford Haven, the Thor and the Sunderland. The acquisition of these data aimed to assist RCAHMW maritime team and the Sunderland Trust with on-going archaeological research and fund-raising. The marine geophysical surveys also targeted a total of ten suspected and known wreck site locations off the coast of Lleyn peninsula in North Wales. These included eight unconfirmed positions of 19th century Welsh vessels associated with the slate mining industry, two designated sites the Diamond and the Tal-Y-Bont, and the marine hazard of St Patrick’s Causeway with the aim of discovering new wreck sites. The project aimed to acquire marine geophysical data consisting of high resolution sidescan sonar and magnetic gradiometer data over a total of total of 21 known and suspected wreck positions and along the known marine hazard of St. Patrick’s Causeway. Since the sites were located in two different areas, they were surveyed during two separate surveys from the Pembroke based vessel Blue Shark. The first session surveyed sites mostly off Milford Haven in south Wales between 17th and 18th April 2010. The second session surveyed sites off the coast of Lleyn peninsula and along St. Patrick’s Causeway in north Wales between 23rd April 2010 and 2nd May 2010 with a day of mobilisation and a day of demobilisation at the start and end of the survey session. The geology and geophysics component of the data are archived at British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Data were also provided to other archive centres as appropriate.

  • This geophysical survey has been carried out by Marine Geophysics Unit of British Geological Survey (BGS) for BGS, the survey took place from June to July 1971 in the North Scotland and Minch area, on board the MV Surveyor. The purpose was to collect data as part of a regional mapping programme. Sea floor data were collected using Echosounder and Transit sonar. These data are archived by BGS. No BGS survey report currently available, IGS 1971 annual report contains summary.

  • Wessex Archaeology (WA) was commissioned by English Heritage (EH) to undertake geophysical surveys as part of the project entitled ‘Wrecks on the Seabed: Assessing, Evaluating and Recording’, supported by Round 2 of the Aggregate Levy Sustainability Fund (ALSF). The specific aim of this project was to provide industry, regulators and contractors with guidance on the archaeological assessment, evaluation and recording of wreck sites. ‘Assessment, evaluation and recording’ are taken to include various methods of archaeological investigation that are intended to improve the understanding, preservation and appreciation of the historic environment. Geophysical surveys were conducted over five wreck site areas. This archive relates to the geophysical survey over the Liberator, an unknown wreck, and the submarine U86. Sidescan sonar and magnetometer data were acquired from the vessel Wessex Explorer on the 9th and 12th August 2005 and the multibeam echosounder data were acquired on the 15th and 19th August 2005. The geology and geophysics component of the data are archived at British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Data were also provided to other archive centres as appropriate.

  • This marine geophysical survey undertaken by Institute of Geological Sciences (BGS) part funded by the Water Resources Board took place March to June 1972 in The Wash on board the fishing vessel Exact. Sea floor data were collected using a transit sonar. Subsurface data were gathered using a pinger, boomer and sparker , a total of 426.5 miles were covered. These data are archived by BGS. Technical details of the survey are contained in BGS Internal Report WB/ MG/72/ 45, details of Wash surveys contained in WB/MG/74/030 and IGS report 78/18.

  • This geophysical survey was carried out under contract for the Marine Aggregate Levy Sustainability Fund (MALSF) as part of a Regional Environmental Characterisation, the survey took place from the 8th March to the 18th March 2010. This project is to extend the mapped coverage of the Eastern English Channel Marine Habitat Map (EECMHM) to include the coastal platform from Saltdean east to Dungeness and provide an integrated map dataset covering this extension area The geophysical data was acquired using Surface Tow Boomer and Sidescan sonar equipment. Technical detail of the survey are contained in BGS Open Report OR/10/052.

  • This JNCC marine survey took place in July 2009 and surveyed two areas (Anton Dohrn seamount and East Rockall Bank Reef) for offshore Special Areas of Conservation (SACs). These areas are both now pSACs. The survey was commissioned by JNCC and undertaken by the British Geological Survey, University of Plymouth and Marin Mättenik AB. The aim was to enable the distribution, extent and biological characterisation of Annex I reef. Sidescan sonar data was acquired using a MMT AB EdgeTech 2200-MP, Multibeam bathymetry data were collected using a Kongsberg EM710, a Seatronics Drop Frame Camera System was used for digital photography and video. The geology and geophysics component of the data are archived at the British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Biological and bathymetry data are archived at DASSH and UKHO respectively. For more information see http://jncc.defra.gov.uk/page-5026. Technical details of the survey are contained in BGS Commercial Report CR/09/113 (http://nora.nerc.ac.uk/id/eprint/511601/), http://jncc.defra.gov.uk/PDF/2009_3_JNCC_Cruise_Report_Public%20(2).pdf.