4f4c4942-4343-5764-6473-313130303234 English NRW_DS121633 Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en 2024-12-09T12:37:50.994Z NRW 1.0 wel Latitude and Longitude (EPSG::4326) Countryside Council for Wales (CCW) Acoustic Habitat Survey (multibeam) of Habitat and Feature Distribution in Pembrokeshire Marine Candidate Special Area of Conservation (cSAC) Countryside Council for Wales (CCW) Acoustic Habitat Survey (multibeam) of Habitat and Feature Distribution in Pembrokeshire Marine Candidate Special Area of Conservation (cSAC) Longdin and Browning Acoustic Habitat Survey of Pembrokeshire Marine SAC Arolwg acwstig o ddosbarthiad cynefinoedd a nodweddion yn yACA Morol Sir Benfro Arolwg Acwstig ar Gynefin ACA Sir Benfro Forol Multi beam survey Pembs SAC. 2002-02-28 NRW_DS110024 Pembrokeshire Marine candidate Special Area of Conservation (cSAC) is a large area including open coast and the Milford Haven Waterway that has been identified as being of European marine conservation importance. Features of this site include marine species and seabed habitats. The purpose of the Acoustic Habitat Survey was to provide information on the nature and characteristics of the seabed within defined areas of the Pembrokeshire coastline. The dataset contains the results of a project to gather topographical and seabed characterisation information to improve the knowledge of the site and to aid in future site management and feature monitoring. Primary focus- areas of topographical distinction such as reefs, other hard substrata and sandbanks. Areas covered in the Pembrokeshire cSAC survey include; Skomer, Grassholm, Hats & Barrels, Welshmans Bay, East side of Skokholm, St Ann's Head, Milford Approaches and the majority of the Milford Haven estuary upstream as far as Picton Point. Pembrokeshire Marine candidate Special Area of Conservation (cSAC) is a large area including open coast and the Milford Haven Waterway that has been identified as being of European marine conservation importance. Features of this site include marine species and seabed habitats. The purpose of the Acoustic Habitat Survey was to provide information on the nature and characteristics of the seabed within defined areas of the Pembrokeshire coastline. The dataset contains the results of a project to gather topographical and seabed characterisation information to improve the knowledge of the site and to aid in future site management and feature monitoring. Primary focus- areas of topographical distinction such as reefs, other hard substrata and sandbanks. Areas covered in the Pembrokeshire cSAC survey include; Skomer, Grassholm, Hats & Barrels, Welshmans Bay, East side of Skokholm, St Ann's Head, Milford Approaches and the majority of the Milford Haven estuary upstream as far as Picton Point. Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Longdin and Browning (Surveys) Limited Cherry Tree House, Carmarthen Road, Swansea, SA1 1HE email@longdin.co.uk http://www.longdin.co.uk/ Natural Resources Wales (NRW) Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales enquiries@naturalresourceswales.gov.uk http://naturalresources.wales/?lang=en Habitats and biotopes GEMET - INSPIRE themes, version 1.0 GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme habitats (see also specific types of habitats) Pembrokeshire Marine cSAC Pembrokeshire (county pre 1974)( county since 4/96) Special Areas of Conservation (SAC) (see also Candidate Special Areas of Conservation cSAC) acoustic observation (acoustic monitoring) marine and freshwater inventory feature habitat distribution feature distribution Bathymetric survey bathymetry multibeam NRW Thesaurus NRW Thesaurus 2023-12-31 geonetwork.thesaurus.local.theme.converted_nrw-keywords Habitat characterisation Habitat extent SeaDataNet Parameter Discovery Vocabulary SeaDataNet Parameter Discovery Vocabulary 2021-01-06 geonetwork.thesaurus.external.theme.rdf+xml There are no access restrictions to this data. NRW may release, publish or disseminate it freely. no limitations © CNC/NRW 2002 There are no use restrictions on this data. Recipients may re-use, reproduce, disseminate this data free of charge in any format or medium, provided they do so accurately, acknowledging both the source and NRW's copyright, and do not use it in a misleading context. It is the recipient's responsibility to ensure the data is fit for the intended purpose, that dissemination or publishing does not result in duplication, and that it is fairly interpreted. Advice on interpretation should be sought where required. To avoid re-using old data, users should periodically obtain the latest version from the original source. English environment SeaVoX Vertical Co-ordinate Coverages SeaVoX Vertical Co-ordinate Coverages 2021-01-06 benthic boundary layer Wales (WLS) -5.50000584 -4.51420633 51.48042269 52.08036396 2001-08-24 2001-09-14 1.5 60 Habitat and feature distribution in Pembrokeshire marine cSAC : acoustic habitat survey Geographic Information System Report (MS Word), Map Info TAB Files, BITMAP image 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 Once mobilisation and all calibrations had been conducted, survey work could proceed. The same basic method of survey was used throughout the whole survey area. Throughout the project the vessel was moored in Milford Dock. When leaving the dock, or while alongside the Mackerel pontoon outside the dock entrance, a course check was made on the navigation systems. All transit time was put to full use by conducting survey to and from site. Once all systems were found to be operating correctly a sound velocity profile was observed. The results of the profile were entered into both the multibeam system and the single beam sounder. Once the vessel arrived at the proposed working location for the day another S/V profile was observed. The results were entered into the relevant equipment. Sidescan sonar was required in the Marine Nature Reserve (MNR), now classified as Marine Conservation Zone (MCZ). This was observed at the same time as the Multibeam data. As a large proportion of this area was relatively shallow the sidescan was towed behind the vessel on a fairly short tow cable. The offset of the fish behind the Central Reference Point (CRP) of the vessel was applied in the Sidescan data capture system (Octopus 460). Once mobilisation and all calibrations had been conducted, survey work could proceed. The same basic method of survey was used throughout the whole survey area. Throughout the project the vessel was moored in Milford Dock. When leaving the dock, or while alongside the Mackerel pontoon outside the dock entrance, a course check was made on the navigation systems. All transit time was put to full use by conducting survey to and from site. Once all systems were found to be operating correctly a sound velocity profile was observed. The results of the profile were entered into both the multibeam system and the single beam sounder. Once the vessel arrived at the proposed working location for the day another S/V profile was observed. The results were entered into the relevant equipment. Sidescan sonar was required in the Marine Nature Reserve (MNR), now classified as Marine Conservation Zone (MCZ). This was observed at the same time as the Multibeam data. As a large proportion of this area was relatively shallow the sidescan was towed behind the vessel on a fairly short tow cable. The offset of the fish behind the Central Reference Point (CRP) of the vessel was applied in the Sidescan data capture system (Octopus 460).