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Metadata: 2015, EGS, Docking Shoal, Met Mast Clearance Survey
Abstract:
EGS International Ltd (EGSi) were contracted by Centrica Renewable Energy Limited (CREL) to undertake a hydrographic, geophysical and UXO survey within the area of the Docking Shoal Meteorological Mast. A jack-up vessel will be used to remove the decommissioned Met Mast on Docking Shoal, with the platform and above section of the mast being removed and the remaining subsea section of the monopole being cut off to 1 metre below seabed level. Prior to the jack-up vessel’s arrival, a UXO site clearance survey was required to enable the vessel to safely jack up close to the Met Mast. An Acoustic Wave and Current Profiler (AWAC) seabed frame was also known to be located within the vicinity of the Met Mast. However, its position was not known and survey data was required to accurately locate this frame. The water depths across the site around the met mast range from 6.5 metres below LAT (eastern extent) to 12.5 metres below LAT (south and western extent). The mean sea level depth at the proposed survey area is 13.5 metres. The survey specifications were to: • Acquire bathymetric data with 100% coverage within the pre-defined survey area • Acquire high density magnetic data to allow UXO identification and analysis • Acquire high resolution side-scan sonar data with at least 100% coverage within the pre-defined survey area to identify targets on the seabed and, thereby, assist with UXO identification • Acquire high resolution shallow seismic data to identify buried objects • Acquire side-scan sonar, magnetic, seismic and bathymetric datasets to identify obstructions which could impede the arrival of the Jack up vessel, specifically, potential items of UXO, significant objects and man-made features on the seafloor • Acquire MBES data to determine the depth of the seabed relative to the met mast so that the mast can be removed from the correct level (at least 1m below the seabed).
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 19386 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | 2015, EGS, Docking Shoal, Met Mast Clearance Survey |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Met Mast Clearance Survey |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | c3bb87c9-731b-4cf6-ab10-5baa6ddd18f5 |
| Resource Identifier | This is the code assigned by the data owner. | TCE-290 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | series |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2015-03-26 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2015-04-11 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 0.5, 1 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001, urn:ogc:def:uom:EPSG::9001 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | EGS International Ltd (EGSi) were contracted by Centrica Renewable Energy Limited (CREL) to undertake a hydrographic, geophysical and UXO survey within the area of the Docking Shoal Meteorological Mast. A jack-up vessel will be used to remove the decommissioned Met Mast on Docking Shoal, with the platform and above section of the mast being removed and the remaining subsea section of the monopole being cut off to 1 metre below seabed level. Prior to the jack-up vessel’s arrival, a UXO site clearance survey was required to enable the vessel to safely jack up close to the Met Mast. An Acoustic Wave and Current Profiler (AWAC) seabed frame was also known to be located within the vicinity of the Met Mast. However, its position was not known and survey data was required to accurately locate this frame. The water depths across the site around the met mast range from 6.5 metres below LAT (eastern extent) to 12.5 metres below LAT (south and western extent). The mean sea level depth at the proposed survey area is 13.5 metres. The survey specifications were to: • Acquire bathymetric data with 100% coverage within the pre-defined survey area • Acquire high density magnetic data to allow UXO identification and analysis • Acquire high resolution side-scan sonar data with at least 100% coverage within the pre-defined survey area to identify targets on the seabed and, thereby, assist with UXO identification • Acquire high resolution shallow seismic data to identify buried objects • Acquire side-scan sonar, magnetic, seismic and bathymetric datasets to identify obstructions which could impede the arrival of the Jack up vessel, specifically, potential items of UXO, significant objects and man-made features on the seafloor • Acquire MBES data to determine the depth of the seabed relative to the met mast so that the mast can be removed from the correct level (at least 1m below the seabed). |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | All horizontal positions are provided as WGS84 UTM 31N coordinates, parameters of which are presented in Table 11. All vertical positions are provided as heights relative to LAT as defined by the United Kingdom Hydrographic Office Vertical Offshore Reference Frame (UKHO VORF) model. The Applanix POS MV 320 and the C&C Technologies C-Nav 2050 were used as the primary and secondary navigations systems onboard MV Wessex Explorer, respectively. The USBL system was used for the positioning of the SSS and Magnetometer data. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Seismic reflection |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Side-scan sonar | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Sediment acoustics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Magnetics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Decommissioning | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Permanent instruments | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Elevation | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 53.232094363577 |
| East | The eastern-most limit of the data resource in decimal degrees | 0.89551225739273 |
| South | The southern-most limit of the data resource in decimal degrees | 53.133685685506 |
| West | The western-most limit of the data resource in decimal degrees | 0.63813169268556 |
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | EGS International Ltd | |
| Phone | +44 1420 489 329 | |
| info@egssurvey.co.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | The Crown Estate | |
| Phone | +44 020 7851 5000 | |
| enquiries@thecrownestate.co.uk | ||
| Role | The owner is the person or organisation that owns the resource. | owner |
| Organisation name | Centrica Energy | |
| roy.rossington@centrica.com | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-290/summary |
| Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk | |
| Dataset constraints | ||
| 20.1 Limitations on Public Access - Access constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 20.2 Limitations on Public Access - Other constraints | There will be no limitations when published on the Marine Data Exchange | |
| 21.1 Conditions for Access and Use - Use constraints | This states `otherRestrictions` from ISO vocabulary RestrictionCode and is an INSPIRE/GEMINI requirement. | otherRestrictions |
| 21.2 Conditions for Access and Use - Other constraints | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | Data Must be used in accordance to the Marine Data Exchange's Terms of Use: https://www.marinedataexchange.co.uk/content/info/terms-of-use |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2021-05-17 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-03-24 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | 3.1.2 |