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Metadata: 2007, Fugro, Lynn and Inner Dowsing, Side-scan Sonar Debris Clearance Survey
Abstract:
This report contains the operation details and results of the Lynn and Inner Dowsing Windfarm Mono Pile Foundation pre-construction side scan sonar debris clearance survey carried out for MT Højgaard A/S commisioned by Centrica. The fieldwork was undertaken between the 20th March and the 10th May 2007 by Fugro Survey Limited, using the M/V Genesis. Work consisted of a SSS survey to determine any seabed contacts within an area encompassing all 60 proposed monopile locations for the Lynn and Inner Dowsing Windfarm. It was proposed that lines are performed nominally every 40 metres in the mainline orientation withcross lines nominally every 200 metres. Mainlines are also run 20 metres offset from each monopile location with a cross-line again offset by 20 metres from each location. The Service Warranty in Appendix E outlines the limitations of this report.
Data holder:
The Crown Estate
| Other details | ||
| Internal code | Internally assigned metadata identifier | 28062 |
| 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. | 2007, Fugro, Lynn and Inner Dowsing, Side-scan Sonar Debris Clearance Survey |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | Side-scan Sonar Debris 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. | bc01a025-f66e-4236-ab25-4863eda07bca |
| Resource Identifier | This is the code assigned by the data owner. | TCE-1067 |
| 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 | 2007-03-20 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2007-05-10 |
| 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. | This report contains the operation details and results of the Lynn and Inner Dowsing Windfarm Mono Pile Foundation pre-construction side scan sonar debris clearance survey carried out for MT Højgaard A/S commisioned by Centrica. The fieldwork was undertaken between the 20th March and the 10th May 2007 by Fugro Survey Limited, using the M/V Genesis. Work consisted of a SSS survey to determine any seabed contacts within an area encompassing all 60 proposed monopile locations for the Lynn and Inner Dowsing Windfarm. It was proposed that lines are performed nominally every 40 metres in the mainline orientation withcross lines nominally every 200 metres. Mainlines are also run 20 metres offset from each monopile location with a cross-line again offset by 20 metres from each location. The Service Warranty in Appendix E outlines the limitations of this report. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | A GeoAcoustics SS941 transceiver with a GeoAcoustics 159D dual frequency tow fish was utilised for the acquisition of side scan sonar data. The system consists of a towed underwater fish which sends out short high frequency, high intensity, sound waves beamed from either side in a direction perpendicular to the direction of travel. The acoustic beam is narrow in the horizontal plane, yet sufficiently broad in the vertical plane for the transducers to receive echoes from the seabed. These echoes, once detected by the transducers, are sent via the tow cable to the deck unit, which electronically processes the signals and prints them line by line to produce the sonar image on the recorder. For the purposes of this survey, the high frequency 500 kHz transducers were used and the system set to 50 metres per channel, which provided a coverage width of 100 metres centred on each survey line. The data were further enhanced by the use of a CODA processing system with all data recorded digitally to enable further processing, should it be required. The recorded data is annotated at every fix, with fix number and grid co-ordinates. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Hazards to navigation |
| 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 | Geotechnics | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Construction monitoring | |
| General subject area(s) associated with the resource, uses multiple controlled vocabularies | Renewable Energy Lease area | |
| 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 | 53.213957312194 |
| East | The eastern-most limit of the data resource in decimal degrees | 0.49066878909487 |
| South | The southern-most limit of the data resource in decimal degrees | 53.123513905485 |
| West | The western-most limit of the data resource in decimal degrees | 0.42957461203709 |
| 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 | |
| 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 | Fugro Survey Limited | |
| https://www.fugro.com/contact | ||
| 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 | XceCo Limited | |
| ask@xceco.co.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | https://www.marinedataexchange.co.uk/details/TCE-1067/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. | 2026-08-12 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-08-11 |
| 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 |