Wessex Archaeology (WSX) Geophysical Survey: WESSEX2A: (17/Feb/2005 to 17/Feb/2005)

Wessex Archaeology (WA) was commissioned by English Heritage (EH) to undertake geophysical surveys as part of the project entitled ‘Wrecks on the Seabed: Assessing, Evaluating and Recording’, supported by Round 2 of the Aggregate Levy Sustainability Fund (ALSF). The specific aim of this project was to provide industry, regulators and contractors with guidance on the archaeological assessment, evaluation and recording of wreck sites. ‘Assessment, evaluation and recording’ are taken to include various methods of archaeological investigation that are intended to improve the understanding, preservation and appreciation of the historic environment. Geophysical surveys were conducted over four wreck site areas. This archive relates to the geophysical survey over Hastings Shingle Bank covering the area of the wreck Thomas Lawrence. During the geophysics survey sidescan sonar, single beam echosounder, multibeam echosounder and magnetometer data were acquired. Sidescan sonar, magnetometer and single beam bathymetric surveys were conducted over the Hastings Shingle Bank by Titan Surveys Ltd., aboard the survey vessel Titan Explorer, under supervision from WA staff. These surveys was conducted intermittently during 15 survey days over 47 days between the 17th February – 5th April 2005 with substantial delays due to adverse weather conditions. The geology and geophysics component of the data are archived at British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Data were also provided to other archive centres as appropriate.

Simple

Date (Publication)
2005-02-17
Citation identifier
British Geological Survey / BGS_CMD_REF652
Point of contact
Organisation name Individual name Electronic mail address Role

British Geological Survey (BGS)

enquiries@bgs.ac.uk

Custodian

Wessex Archaeology

offshoredata@bgs.ac.uk

Originator
Maintenance and update frequency
Not planned
Keywords

GEMET - INSPIRE themes, version 1.0

SeaVoX Vertical Co-ordinate Coverages (L131)

SeaDataNet Parameter Discovery Vocabulary (P021)
Access constraints
Other restrictions
Access constraints
No restrictions, a copyright acknowledgement is required and permission from any third party for the release of the data has been obtained. Inclusion of any third party data will determine the copyright acknowledgement that needs to be made.
Use constraints
Other restrictions
Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Use limitation

unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced Wessex Archaeology materials "Contains Wessex Archaeology materials ©Wessex Archaeology [year]"

Spatial representation type
Grid
Distance
5  urn:ogc:def:uom:EPSG::9001
Language
English
Topic category
  • Geoscientific information
Geographic identifier
Dungeness-Boulogne

BGS Gazetteer 2025-04-26 revision

Geographic identifier
Eastern Channel

Charting Progress 2: Regional Sea Boundaries 2009-06-18 creation

Geographic identifier
DOVER STRAIT

The SeaVoX Salt and Fresh Water Body Gazetteer: Sub-Ocean Category 1954-01-01 creation

N
S
E
W
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Begin date
2005-02-17
End date
2005-02-17
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326

www.epsg.org 2005 revision

Distribution format
    Distributor contact
    Organisation name Individual name Electronic mail address Role

    British Geological Survey (BGS)

    enquiries@bgs.ac.uk

    		Distributor
    OnLine resource
    Protocol Linkage Name

    HTTP

         		http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=WESSEX2A

    BGS Offshore Geoindex
    Hierarchy level
    Dataset

    Conformance result

    Title

    INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of unknown theme
    Date (Publication)
    2011
    Explanation

    See the referenced specification
    Pass
    No
    Statement

    Geophysical equipment types used included: Echo Sounder, Magnetometer and Sidescan Sonar. Titan Environmental Surveys Ltd was contracted to undertake the survey on behalf of Wessex Archaeology. The navigation and data acquisition system used aboard the Titan Explorer was based on Trimble’s HYDROpro software. The primary and secondary positioning systems, echosounder, magnetometer and heading sensor were interfaced to this system. In addition, position data, analogue fix marks and digital fix information were output to the sidescan sonar, magnetometer and echosounder systems. Single beam bathymetric data was acquired using an Odom Hydrotrac echosounder and a CMS-25 motion reference unit on all sidescan sonar and magnetometer survey lines conducted over the 2km x 2km area. Bathymetric data were recorded digitally by HYDROpro, and reduced to Chart Datum using post-processed kinematic (PPK) observed tides. A Klein 3000 dual frequency digital sidescan sonar, which operates at both 125kHz and 445kHz simultaneously, was used for all sidescan surveys. Magnetometer data over the Hastings Shingle Bank area were collected using a Geometrics G881 Caesium Magnetometer. Multibeam echosounder data were acquired from the vessel Wessex Explorer between the 15th and 19th August 2005. Navigation was provided by a Fugro Omnistar 8300 HP GPS receiver, with corrections provided via satellite subscription service which gave a positional accuracy of ±10cm. Multibeam bathymetric data was acquired by Netsurvey Ltd. using a Reson 8125 Multibeam echosounder and a MHARS motion reference unit and gyro. Sound velocity profiles were recorded at the start of each multibeam survey and then as required during the survey. The raw bathymetric data were processed Netsurvey Ltd, in order to apply tidal corrections and remove any spikes in the data.

    Metadata

    File identifier
    c5a7ef2f-f8c4-066c-e044-0003ba9b0d98 XML
    Metadata language
    English
    Hierarchy level
    Dataset
    Date stamp
    2025-04-26
    Metadata standard name

    MEDIN Discovery Metadata Standard
    Metadata standard version

    Version 2.3.5
    Metadata author
    Organisation name Individual name Electronic mail address Role

    British Geological Survey (BGS)

    enquiries@bgs.ac.uk

    		Point of contact
     
     

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    Keywords



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