Countryside Council for Wales (CCW) Acoustic Habitat Survey (multibeam) of Habitat and Feature Distribution in Pembrokeshire Marine Candidate Special Area of Conservation (cSAC)

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.

Identifier: NRW_DS110024

Alternative Title

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.

Metadata Language: English

Lineage: 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).

Dataset Reference Date (Publication): 2002-02-28

Temporal Extent

Begin date: 2001-08-24

End date: 2001-09-14

Topic category

Environment

Owner

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Originator

Longdin and Browning (Surveys) Limited

Cherry Tree House, Carmarthen Road, Swansea, SA1 1HE

http://www.longdin.co.uk/

Extent

Geographic Extent: Wales (WLS)

Vertical Extent

Medin Extent Keyword: benthic boundary layer

Vertical Extent

Minimum value (metres): 1.5

Maximum value (metres): 60

Vertical CRS

Format Type and Description

Geographic Information System Geographic Information System ()

Specification

Report (MS Word), Map Info TAB Files, BITMAP image files.

Data quality

Quality Scope: Dataset

Conformity: 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
Explanation
Degree: false

Lineage: 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).

Keywords

GEMET - INSPIRE themes, version 1.0

Habitats and biotopes

Type: Theme

Citation

Date (Publication): 2008-06-01

Code: geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme

Keywords

NRW Thesaurus

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

Type: Theme

Citation

Date (Publication): 2023-12-31

Code: geonetwork.thesaurus.local.theme.converted_nrw-keywords

Keywords

SeaDataNet Parameter Discovery Vocabulary

Habitat characterisation
Habitat extent

Type: Theme

Citation

Date (Revision): 2021-01-06

Code: geonetwork.thesaurus.external.theme.rdf+xml

Code: Latitude and Longitude (EPSG::4326)

Content Information

NRW Profile

Custom Elements

NRW Related Title: Habitat and feature distribution in Pembrokeshire marine cSAC : acoustic habitat survey

Constraints

Limitations on Public Access and Use

Restriction type: Other restrictions

Access Constraints Directive

Limitations: no limitations

Access Constraints Text

Other constraints: There are no access restrictions to this data. NRW may release, publish or disseminate it freely.

Use Constraints

Use constraints type: Other restrictions

Other constraints: © 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.

Metadata

File Identifier: 4f4c4942-4343-5764-6473-313130303234 XML

Metadata Language: English

Parent Identifier: Multibeam Acoustic Data Index
NRW_DS121633

Resource type: Dataset

Metadata Date: 2024-05-31T09:29:19.093Z

Metadata Standard Name: NRW

Metadata Standard Version: 1.0

pointOfContact

Natural Resources Wales (NRW)

Maes-y-Ffynnon, Penrhosgarnedd, Bangor, Gwynedd, LL57 2DW, Wales

http://naturalresources.wales/?lang=en

Publishing Body

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Countryside Council for Wales (CCW) Acoustic Habitat Survey (multibeam) of Habitat and Feature Distribution in Pembrokeshire Marine Candidate Special Area of Conservation (cSAC)

Identification

Temporal Extent

Extent

Extent

Vertical Extent

Vertical Extent

Distribution

Quality

Data quality

Keywords

Keywords

Citation

Keywords

Citation

Keywords

Citation

Spatial Reference System

Content

Content Information

NRW Profile

Custom Elements

Constraints

Constraints

Limitations on Public Access and Use

Access Constraints Directive

Access Constraints Text

Use Constraints

Metadata

Metadata

Publishing Body