abc9f747-53bb-0f38-e044-0003ba9b0d98 English dataset British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk pointOfContact 2026-03-10 MEDIN Discovery Metadata Standard Version 2.3.5 www.epsg.org 2005 revision urn:ogc:def:crs:EPSG::4326 OGP British Geological Survey (BGS) Geophysical Survey 1981/6: Bristol Channel & SW Approaches (21/09/1981 to 29/09/1981) 1981-09-29 publication BGS_CMD_REF196 British Geological Survey Report: Brett, CP. 1981. Operations report on Project 81/06. A Regional Geophysical Survey in the Bristol Channel and South West Approaches. (IGS Report No 122) The objectives of this survey were to fill in gaps in the previously surveyed areas in the Bristol Channel and Nymphe Bank sheets of the IGS 1:250000 map series. British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk custodian British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK offshoredata@bgs.ac.uk originator notPlanned NDGO0001 Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication soil and sediment crust SeaVoX Vertical Co-ordinate Coverages (L131) 2010-05-18 revision Gravity Bathymetry and Elevation Magnetics Two-dimensional seismic reflection Side-scan sonar SeaDataNet Parameter Discovery Vocabulary (P021) 2011-07-27 revision otherRestrictions otherRestrictions otherRestrictions 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. unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced British Geological Survey materials "Contains British Geological Survey materials ©UKRI [year]" grid 5 English geoscientificInformation BGS Gazetteer 2026-03-10 revision Haig Fras BGS Gazetteer 2026-03-10 revision Lands End BGS Gazetteer 2026-03-10 revision Nymphe Bank BGS Gazetteer 2026-03-10 revision Lundy BGS Gazetteer 2026-03-10 revision Bristol Channel Charting Progress 2: Regional Sea Boundaries 2009-06-18 creation Western Channel & Celtic Sea The SeaVoX Salt and Fresh Water Body Gazetteer: Sub-Ocean Category 1954-01-01 creation BRISTOL CHANNEL The SeaVoX Salt and Fresh Water Body Gazetteer: Sub-Ocean Category 1954-01-01 creation CELTIC SEA -6.6419 -3.3881 50.7126 51.6947 1981-09-21 1981-09-29 British Geological Survey (BGS) +44 (0)131 667 1000 +44 (0)131 668 4140 The Lyell Centre, Research Avenue South Edinburgh EH14 4AP UK enquiries@bgs.ac.uk distributor http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1981/6 WWW:LINK-1.0-http--link BGS Offshore Geoindex 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. search dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of unknown theme 2011 publication See the referenced specification false Geophysical equipment types used included: Airgun/Sleeve Gun, Deep Tow Boomer, Echo Sounder, Gravimeter, Magnetometer, Sidescan Sonar and Sparker. The survey was undertaken by British Geological Survey. Navigation: Magnavox satellite navigation system integrated with MX610 doppler sonar and Arma Brown Mk I Mod 5 gyro compass. Dacca Mk 21 main chain receiver - optional integration with above. Equipment: Huntec deep tow boomer system with remote controlled winch, Krohn-hite bandpass filter and display on an EPC 3200 graphic recorder. Atlas Deso 10 echo sounder with hull mounted transducers (33 and 210KHz) and Edig 10 digitiser unit. LaCoste & Romberg S75 air-sea gravity meter. EG&G sparker system, with up to 5kJ capability. One 3-element and one 9-element spark array, Krohn-hite bandpass filter, TSS Model 307 TVG amplifier, TSS Mobel 302 swell filter and display on an EPC 4600 or EPC 3200 graphic recorder, Teledyne hydrophone system. UDI AS350 dual channel side scan sonar system with catamaran tow fish, 2500ft tow cable and remote controlled winch. Display on an EPC 3200 graphic recorder and firing sequence controlled by the seismic control system. Bolt 600B air gun, two guns with standard (1-40 cu.in.) range of chamber sizes, Krohn-hite bandpass filter, TSS Model 307 TVG amplifier and display on an EPC 3200 graphic recorder. For more detailed information see the Cruise Report.