4f4c4942-4343-5764-6473-313135383739 English 2024-05-30T15:18:59.088Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Acoustic Multibeam Echosounder Survey of Ramsey Sound, Pembrokeshire November 2008 (3rd Party Data) Acoustic Multibeam Echosounder Survey of Ramsey Sound, Pembrokeshire November 2008 (3rd Party Data) Arolwg Ecoseiniwr Amlbelydr Acwstig o Swnt Dewi, Sir Benfro Tachwedd 2008 (Data 3ydd Parti) 2008-11-06 EXT_DS115879 A multibeam bathymetric survey was commissioned by Longdin and Browning Ltd, and carried out by Clydeside Surveys Ltd, to carry out a cable route survey in Ramsey Sound, Pembrokeshire. This was carried out to assist the planning of a cable route and any further survey work. The main objectives of the survey were to provide the following: - Accurate and repeatable Bathymetric survey - Acoustic imaging of the seabed to identify seabed features. The most important aspect of this survey was to obtain accurate bathymetric survey data, over the entire survey area and also to check the digital imaging data for changes in seabed type. A multibeam bathymetric survey was commissioned by Longdin and Browning Ltd, and carried out by Clydeside Surveys Ltd, to carry out a cable route survey in Ramsey Sound, Pembrokeshire. This was carried out to assist the planning of a cable route and any further survey work. The main objectives of the survey were to provide the following: - Accurate and repeatable Bathymetric survey - Acoustic imaging of the seabed to identify seabed features. The most important aspect of this survey was to obtain accurate bathymetric survey data, over the entire survey area and also to check the digital imaging data for changes in seabed type. Longdin and Browning (Surveys) Limited Cherry Tree House, Carmarthen Road, Swansea, SA1 1HE email@longdin.co.uk http://www.longdin.co.uk/ Longdin and Browning (Surveys) Limited Cherry Tree House, Carmarthen Road, Swansea, SA1 1HE email@longdin.co.uk http://www.longdin.co.uk/ Geology Oceanographic geographical features GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme multibeam Ramsey Sound, Pembrokeshire Ramsey & St Davids Peninsula Coast Bathymetric survey 3rd Party Data Third Party Data NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Acoustic backscatter in the water column Side-scan sonar SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml This dataset is wholly owned by Longdin and Browning. Enquirers are advised to obtain a copy from the owner/originator directly, rather than NRW. NRW may NOT publish or disseminate it in its entirety. no limitations © Longdin and Browning. NRW does NOT grant permission to third parties to re-use or disseminate this dataset. Those seeking such permission should approach the originator directly. English imageryBaseMapsEarthCover geoscientificInformation SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 unknown Pembrokeshire (45) -5.3421 -5.3017 51.8478 51.8896 2008-11-06 2008-11-06 Geographic Information System [A] xyz data [B] Report in PDF format [C] ArcGIS files 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 2010-12-08 false The following equipment were used during the survey. PA c/w Hypack + HySweep Navigation Software: The software used for data collection whilst online and for post processing. CodaOctopus F185+ Motion Reference Unit (MRU) and Gyro system: The MRU is mainly used to compensate the multibeam system for Roll, Pitch and Heave. Steel Calibration Tape, Reson 7125 swathe echosounding system, Seabird SBE 19 CTD and Odom DigiBar Pro SV probe were also used. Surveys were carried out around Ramsey Sound. Once the multibeam surveys were completed the post processing was carried out. The survey data was inspected to ascertain where the seabed consists of general groups of materials defined as follows [these definitions are intended as a guide only and do not form part of a Geophysical or geotechnical investigation or analysis. Sand - This could consist of any sediment, from Silt to Gravels. Sand / Stones - This indicates area where the seabed is mainly Sand but is also littered, sometimes sparsely and sometime heavily by Stones and Boulders. Stones / Rock - These areas indicate that the seabed possibly consists of Rock outcropping at the surface which is littered with Stones and broken Rock fragments. Rock - this indicates where Rock is outcropping at the surface. The following equipment were used during the survey. PA c/w Hypack + HySweep Navigation Software: The software used for data collection whilst online and for post processing. CodaOctopus F185+ Motion Reference Unit (MRU) and Gyro system: The MRU is mainly used to compensate the multibeam system for Roll, Pitch and Heave. Steel Calibration Tape, Reson 7125 swathe echosounding system, Seabird SBE 19 CTD and Odom DigiBar Pro SV probe were also used. Surveys were carried out around Ramsey Sound. Once the multibeam surveys were completed the post processing was carried out. The survey data was inspected to ascertain where the seabed consists of general groups of materials defined as follows [these definitions are intended as a guide only and do not form part of a Geophysical or geotechnical investigation or analysis. Sand - This could consist of any sediment, from Silt to Gravels. Sand / Stones - This indicates area where the seabed is mainly Sand but is also littered, sometimes sparsely and sometime heavily by Stones and Boulders. Stones / Rock - These areas indicate that the seabed possibly consists of Rock outcropping at the surface which is littered with Stones and broken Rock fragments. Rock - this indicates where Rock is outcropping at the surface.