Date (Publication)

1979-07-03

Citation identifier

British Geological Survey / BGS_CMD_REF175

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Geological Survey (BGS)		enquiries@bgs.ac.uk	Custodian
British Geological Survey (BGS)		offshoredata@bgs.ac.uk	Originator

Maintenance and update frequency

Not planned

Keywords

• NDGO0001

GEMET - INSPIRE themes, version 1.0

• Geology

SeaVoX Vertical Co-ordinate Coverages (L131)

• soil and sediment
• crust

SeaDataNet Parameter Discovery Vocabulary (P021)

• Gravity
• Bathymetry and Elevation
• Magnetics
• Two-dimensional seismic reflection
• Side-scan sonar

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 British Geological Survey materials "Contains British Geological Survey materials ©UKRI [year]"

Spatial representation type

Grid

Distance

5  urn:ogc:def:uom:EPSG::9001

Language

English

Topic category

• Geoscientific information

Geographic identifier

Thames Estuary

BGS Gazetteer 2025-04-22 revision

Geographic identifier

Ostend

BGS Gazetteer 2025-04-22 revision

Geographic identifier

East Anglia

BGS Gazetteer 2025-04-22 revision

Geographic identifier

Flemish Bight

BGS Gazetteer 2025-04-22 revision

Geographic identifier

Spurn

BGS Gazetteer 2025-04-22 revision

Geographic identifier

Indefatigable

BGS Gazetteer 2025-04-22 revision

Geographic identifier

Southern North Sea

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

Geographic identifier

NORTH SEA

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

Begin date

1979-04-27

End date

1979-07-03

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=1979/2	BGS Offshore Geoindex

Hierarchy level

Dataset

Statement

Geophysical equipment types used included: Airgun/Sleeve Gun, Deep Tow Boomer, Echo Sounder, Gravimeter, Magnetometer, Pinger, Sparker and Transit Sonar. The survey was undertaken by British Geological Survey. Navigation: Magnavox satellite navigation system integrated with MX 610 doppler sonar. Decca Mk21 Main Chain. Equipment: Atlas Deso 10 echo sounder with digital readout unit (Edig 10). LaCoste & Romberg air-sea gravity meter S75 with LaCoste & Romberg 9400 data acquisition system. Two Barringer magnetometers. Edo Western 248 pinger with hull mounted transducers. IGS multi-element spark array and EG&G 9 candle and 3 candle spark arrays. Two 30m Geomechanique hydrophones and one 50m Geomechanique hydrophone. Project 79/16 was designed to provide regional geophysical coverage of the south North Sea in the British sector between 52N and 53.5N on a primarily NS-EW grid of lines at approximately 7.5km by 9km spacing. The information obtained from the shallow seismic equipment was to be used as a basis for drilling and sampling by IGS, CSSU later in the year. Gravity and mangetic equipment were also carried to supplement work carried out in 1978. The 4kJ and 800J sparkers were run for most of the second leg, giving penetration of up to 700m and 150m respectively, with approximately 8m resolution on the 800J records. During the third leg the 1kJ sparker was run as an alternative on a number of lines. During leg 4, the 500J sparker gave penetration of up to 100m with improved reflector resolution over previous legs. The 4kJ sparker worked well though mains interference marred some lines. The pinger provided good definition in the top 20m below seabed and enabled the tracing of two major channel systems across the survey area. For more detailed information see the Cruise Report.

Metadata

File identifier

abc9f747-53d4-0f38-e044-0003ba9b0d98 XML

Metadata language

English

Hierarchy level

Dataset

Date stamp

2025-04-22

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