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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.

  • This British Geological Survey (BGS) regional marine geophysical and sampling survey took place in September-October 1971 in Lyme Bay on board the fishing vessel Dorset Lass. The purpose was to obtain more information on sediment transport and solid geology, carried out in conjunction with the Engineering Geology Unit. Sonar records were obtained from a KH MS.47 transit sonar. Seabed samples were collected by scuba divers. These data are archived by BGS. Summary details of the survey are contained in Institute Geological Sciences (IGS) Report 79/10.

  • 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.

  • 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.

  • 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.

  • This survey has been carried out in May/June 2009 off the east coast of East Anglia on board the CEFAS Endeavour under contract for the Aggregate Levy Sustainability Fund (MALSF) comprising the acquisition of groundtruthing data including vibrocore samples, clamshell grab samples, mini-Hamon grab samples, 2m Jennings beam trawls and various camera techniques as part of a Regional Environmental Characterisation. The sample sites were chosen based on data acquired on the BGS 2008/04 / CEND 18/08 geophysical survey which took place from the 27th September to the 30th October 2008. Further geophysical data was acquired using a multibeam echosounder and dual frequency side scan sonar. The survey was undertaken in joint collaboration between the British Geological Survey, the Centre for Ecology, Fisheries and Aquaculture Science (CEFAS) and Wessex Archaeology. BGS Internal Report IR/10/019.

  • 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 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 CEFAS marine geophysical survey took place in February/March 2006 in the Eastern English Channel aboard the RV CEFAS Endeavour. This survey was undertaken for the Eastern English Channel Marine Habitat Map study (EECMHM) as part of a series of four surveys. The EECMHM study was funded by the Marine Environment Protection Fund (MEPF) a marine component of the Aggregate Levy Sustainability Fund (MALSF). The purpose of this survey was to infill between lines completed during a previous survey in 2005. Sea floor data were collected using an EM3000 multibeam bathymetry system. Backscatter data were collected using sidescan sonar system. These data are archived with the MEDIN Data Archive Centres (DACs), including the BGS DAC for geology and geophysics and multibeam bathymetry data are available from the UKHO Bathy DAC, https://www.gov.uk/guidance/inspire-portal-and-medin-bathymetry-data-archive-centre. Where Hardcopy records exist these have been archived by CEFAS. Cruise summary report available: https://www.bodc.ac.uk/resources/inventories/cruise_inventory/reports/endeavour6_06.pdf. For further information on the surveys and general information on the EECMHM see the final report (James et al, 2007. Cefas Science Series Technical Report No. 139).