NERC Data Catalogue Service
Wessex Archaeology (WSX) Geophysical Survey WESSEX3B: (23/Aug/2006 to 23/Aug/2006)
Wessex Archaeology was commissioned by Historic Scotland to undertake an Undesignated Site Assessment of the site known as the Tobermory Galleon in Tobermory Bay, Mull. The work was undertaken as part of the Contract for Archaeological Services in Relation to the Protection of Wrecks Act (1973). The assessment was carried out in advance of possible further commercial salvage work on the site. Wessex Archaeology conducted a geophysical survey at three sites within Tobermoray Harbour on the 23rd August 2006. The survey was conducted from the S/V Xplorer. A geophysical survey was followed by diver ground-truthing of anomalies was carried out to confirm the position, extent, stability and character of any significant archaeological deposits. The survey showed that part of the wreck and debris fields from both the sinking and subsequent salvage may still exist although the precise nature, extent and position of archaeological deposits associated with the wreck, in particular any surviving coherent ship structure, remained unclear. The survey included single beam echosounder, sub-bottom profiler and sidescan sonar. 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)
- 2006-08-23
- Identifier
- British Geological Survey / BGS_CMD_REF655
Custodian
British Geological Survey (BGS)
+44 (0)131 668 4140
The Lyell Centre, Research Avenue South
,
Edinburgh
,
EH14 4AP
,
UK
+44 (0)131 667 1000
+44 (0)131 668 4140
- Maintenance and update frequency
- notPlanned Not planned
- Keywords
- GEMET - INSPIRE themes, version 1.0
- SeaVoX Vertical Co-ordinate Coverages (L131)
- SeaDataNet Parameter Discovery Vocabulary (P021)
- Access constraints
- otherRestrictions Other restrictions
- Access constraints
- otherRestrictions 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
- otherRestrictions 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 Historic Scotland materials "Contains Historic Scotland materials ©Crown Copyright [year]"
- Spatial representation type
- grid Grid
- Distance
- 5 urn:ogc:def:uom:EPSG::9001
- Metadata language
- EnglishEnglish
- Topic category
-
- Geoscientific information
- Geographic identifier
-
Tiree
- Date (Revision)
- 2024-11-28
- Geographic identifier
-
Minches & Western Scotland
- Date (Creation)
- 2009-06-18
- Geographic identifier
-
INNER SEAS OFF THE WEST COAST OF SCOTLAND
- Date (Creation)
- 1954-01-01
N
S
E
W
))
- Begin date
- 2006-08-23
- End date
- 2006-08-23
- Reference system identifier
-
OGP
/
urn:ogc:def:crs:EPSG::4326
- Date (Revision)
- 2005
- Distribution format
-
Distributor
British Geological Survey (BGS)
+44 (0)131 668 4140
The Lyell Centre, Research Avenue South
,
Edinburgh
,
EH14 4AP
,
UK
+44 (0)131 667 1000
+44 (0)131 668 4140
- OnLine resource
-
BGS Offshore Geoindex
(
HTTP
)
GeoIndex allows users to search for information about BGS data collections covering the UK and other areas world wide. Access is free, the interface is easy to use, and it has been developed to enable users to check coverage of different types of data and find out some background information about the data. More detailed information can be obtained by further enquiry through the website.
- Hierarchy level
- dataset Dataset
Conformance result
- Date (Publication)
- 2011
- Explanation
- See the referenced specification
- Pass
- No
- Statement
- Geophysical equipment types used included: CHIRP Sub-bottom Profiler, Echo Sounder and Sidescan Sonar. The survey was undertaken by Wessex Archaeology. Throughout the survey all co-ordinates were expressed in WGS84, UTM zone 29N. Single beam bathymetric data were recorded throughout all stages of surveying and was acquired using a Knudsen 320M single beam echo sounder. The echo-sounder transducer was mounted to the survey vessel, and the transducer draught was measured and entered into the echo sounder to obtain depths relative to the sea-surface. A TSS DMS 2.05 motion sensor was rigidly mounted above the transducer to measure the vertical displacement (heave) and attitude (roll/pitch) of the vessel; this data was interfaced with the echo sounder. The accuracy of the draught and velocity offsets were checked at the start of the survey using the bar check method. Sub-bottom profiler data were acquired using a chirp system. The chirp system used was the new EdgeTech 3100P portable sub-bottom profiling system using a SB-126S tow vehicle. The chirp is a high resolution wideband frequency modulated sub-bottom profiler. The system transmits a frequency modulated pulse that is swept over a full spectrum frequency range (in this case 2-12 kHz). The vertical resolution using 2 – 12 kHz frequency is 8cm and in an area of silts and clays, which is typical for the survey areas of concern, the typical sub-seabed penetration is expected to be up in excess of 10m. Sidescan sonar data were acquired using a Klein 3000 dual frequency towfish. This system collects data at 125kHz and 445kHz simultaneously. The Klein 3000 collects data at both high and low frequencies and therefore produces high quality images suitable for archaeological purposes. High and low frequency data were acquired at a range of 75m throughout the survey. Due to the number of moorings and moored vessels in the harbour navigating along planned survey lines was not always possible. However, full coverage of sidescan sonar data was ensured by acquiring sidescan sonar data at a smaller line spacing and running infill lines where necessary.
- File identifier
- c5bc60cd-04e9-3862-e044-0003ba9b0d97 XML
- Metadata language
- EnglishEnglish
- Hierarchy level
- dataset Dataset
- Date stamp
- 2024-11-28
- Metadata standard name
- MEDIN Discovery Metadata Standard
- Metadata standard version
- Version 2.3.5
Point of contact
British Geological Survey (BGS)
+44 (0)131 668 4140
The Lyell Centre, Research Avenue South
,
Edinburgh
,
EH14 4AP
,
UK
+44 (0)131 667 1000
+44 (0)131 668 4140
Overviews
Spatial extent
N
S
E
W
Provided by
Associated resources
Not available