Geophysical Survey 1974/3: Plymouth Bay (21/06/1974 to 30/06/1974)
CP2 Regional Sea Boundaries: Western Channel & Celtic Sea, Offshore 1:250k: Guernsey, Lands End, Lizard, Portland, SeaVoX Sub-Ocean: ENGLISH CHANNEL
This geophysical survey has been carried out by British Geological Survey (BGS) for BGS, the survey took place in June 1974 in Plymouth Bay area, western English Channel on board the MV Briarthorn. The purpose was to collect data as part of UK regional mapping programme. The main objectives were the completion of gravity coverage between MOD surveys to the south and the coast of Plymouth Bay. Acquisition of sparker data along deep seismic lines. Completion of routine sparker coverage over the IGS 1:250000 Lands End sheet, and the eastern part of the IGS 1:250000 Lizard sheet. Sub-bottom profiling data were collected using Sparker. Seabed data were collected using Transit sonar. Gravity and Magnetometer data were recorded. Navigation: Decca Main Chain. These data are archived by BGS. Technical details of the survey are contained in BGS report WB/MG/81/114.
Equipment: Askania GSS-3 gravity meter; Barringer Oceanographic magnetometer; 9-element sparker at powers up to 2500J with Geomecanique hydrophone system; Kelvin Hughes MS47 Transit Sonar; navigation: Decca Mk21 Main Chain. For more detailed information on the acquisition equipment and data collection techniques, operational standards, data processing methods and quality control procedures used on this survey see the Report of Survey/Cruise Report and associated documentation where available. The information available may vary depending on the age of the survey. Data are checked and loaded to the BGS Coastal and Marine data management system following BGS marine data management procedures.
Gravimeter, Magnetometer, Sparker, Transit Sonar
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]"