Side-scan sonar
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This dataset consists of image mosaics of submarine canyons off Morocco collected using TOBI side-scan sonar on RV Maria S. Merian cruise MSM32, which occurred between 25 September and 30 October 2013. Imaging was conducted using a TOBI deep tow sidescan sonar, a high-resolution 2D seismic system consisting of a 150m long 88 channel digital streamer and a standard GI-gun. This cruise formed the field component of NERC Discovery Science project ‘How do submarine landslides disintegrate and form long run-out turbidity currents in the deep ocean, and how erosive are these flows?’ The study aimed to generate the first ever field dataset tracing a large-scale submarine landslide and its associated sediment-gravity flow from source-to-sink. This resulting dataset will aim to answer three important science questions: 1) How quickly do large submarine landslides disintegrate into long run-out sediment flows, and how is this process influenced by shape of the slope? 2) How efficiently do landslides remove failed material, i.e. what proportion of landslide debris is deposited on the slope and how much transforms into a flow that is transported distally? 3) How much sediment is incorporated into the flow through seafloor erosion, and where does most of this erosion take place? The Discovery Science project was composed of Standard Grant reference NE/J012955/1 and was led by Professor Russell Barry Wynn (National Oceanography Centre, Science and Technology). Funding ran from 07 June 2013 to 06 June 2014. Data have been received by BODC as raw files from the RRS James Cook and are available on request from BODC enquiries.
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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.
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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.
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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.
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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.
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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.
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This British Geological Survey (BGS) marine geophysical survey took place during August 2004 in the Outer Bristol Channel aboard the RV Prince Madog. Netsurvey Ltd were commissioned to provide multibeam services. This survey was undertaken for the Outer Bristol Channel Marine Habitat Study (OBCMHS) as part of a series of five surveys. The OBCMHS was principally funded by the Aggregate Levy Sustainability Fund, MALSF, (administered in Wales by the Welsh Assembly Government), the Sustainable Land Won and Marine Dredged Aggregate Minerals Programme of the Office of the Deputy Prime Minister (ODPM), administered by Mineral Industry Research Organisation (MIRO), with contributions from others. Sea floor data collected were high-resolution multibeam bathymetry and side-scan sonar (on selected lines). Subsurface data were gathered using a surface tow boomer (on selected lines). The multibeam data adds to the data collected on a previous survey in 2003 and multibeam products include data from the 2003 survey. Most of the data were recorded digitally. Some paper records were also generated also. These data are archived with the MEDIN Data Archive Centres (DAC), including the BGS DAC for geology and geophysics and the UKHO DAC for bathymetry data. Technical details of the survey are contained in BGS Cruise report IR/05/082 (http://nora.nerc.ac.uk/id/eprint/11121/). For further information on the surveys and general information on the OBCMHS see the final report (Mackie et al, 2006. BIOMOR Reports 4:ISBN 0-7200-0569-8).
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Eastern Inshore Fisheries and Conservation Authority (EIFCA) sidescan sonar survey to characterise the seabed of areas of The Wash, in particular to identify areas indicative of Cobble & Boulder habitat, and of Sabellaria spinulosa. The data is used to inform EIFCA's monitoring within the Wash and North Norfolk Coast Special Area of Conservation. The intention is that the surveys will be repeated at intervals. The survey took place from 7/7/2014 to 8/8/2014 on board the RV Three Counties. Sidescan sonar data were collected using an Edgetech 4200-P Sidescan sonar System. These data are archived at the BGS MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Technical details of the survey are contained in EIFCA Research Report 2014.
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This British Geological Survey (BGS) marine geophysical survey took place during October/November 2003 in the Outer Bristol Channel aboard the RV Prince Madog. Netsurvey Ltd were commissioned to provide multibeam services. This survey was undertaken for the Outer Bristol Channel Marine Habitat Study (OBCMHS) as part of a series of five surveys. The OBCMHS was principally funded by the Aggregate Levy Sustainability Fund, MALSF, (administered in Wales by the Welsh Assembly Government), the Sustainable Land Won and Marine Dredged Aggregate Minerals Programme of the Office of the Deputy Prime Minister (ODPM), administered by Mineral Industry Research Organisation (MIRO), with contributions from others. Sea floor data collected were high-resolution multibeam bathymetry and side-scan sonar (on selected lines). Subsurface data were gathered using a surface tow boomer (on selected lines). The multibeam data collected on this survey were later merged with data from the 2004 survey and this combined dataset is available with the 2004 survey. Most of the data were recorded digitally. Some paper records were also generated also. These data are archived with the MEDIN Data Archive Centres (DAC), including the BGS DAC for geology and geophysics and the UKHO DAC for bathymetry data. Technical details of the survey are contained in BGS Cruise report IR/04/012 (http://nora.nerc.ac.uk/id/eprint/509269/) and BGS Cruise report IR/05/082 (http://nora.nerc.ac.uk/id/eprint/11121/). For further information on the surveys and general information on the OBCMHS see the final report (Mackie et al, 2006. BIOMOR Reports 4:ISBN 0-7200-0569-8).
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The JNCC marine survey was undertaken by CEFAS in April 2008 in the Dogger Bank area North Sea onboard the Cefas Endeavour. This work was in support of JNCC’s requirement to recommend sites for designation as Special Areas of Conservation (SACs) to UK Government, under the EC Habitats Directive. The aim was further developing methodologies for identifying and defining the extent of Annex I shallow sandbank habitat and to conduct new habitat mapping surveys to further develop and integrate geomorphological and biological survey methods and strategies to provide interpreted information in GIS for use in site designation and management of activities in the Dogger bank area. Multibeam bathymetry data were collected using a Kongsberg EM3000D and sidescan sonar data were collected using a Benthos SIS 1624. Groundtruthing techniques including video tows, Hamon grab sampling and beam trawling. 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-4733, JNCC Report 429, available at http://jncc.defra.gov.uk/page-5076. Technical details of the survey are contained in CEFAS Cruise Report CEND 07/08.