Geophysical Survey 1966/3: Moray Firth (08/10/1966 to 14/11/1966)
CP2 Regional Sea Boundaries: Northern North Sea, Offshore 1:250k: Caithness, Great Glen, Moray-Buchan, SeaVoX Sub-Ocean: NORTH SEA
This marine geophysical survey was carried out by Hunting Geology and Geophysics Ltd for Institute of Geological Sciences now British Geological Survey (BGS), the survey took place from October to November 1966 in the Moray Firth on board the MV Rosherville. The purpose was to collect data for regional marine survey linking the coastal geology with offshore structures, test equipment and techniques and train personnel. This project constituted the initial steps of the Institute of Geological Sciences (now BGS) regional marine survey of eastern Scottish waters. At the end of the geophysical survey two days of sampling equipment trials were undertaken. Sea floor data were collected using echosounder. Sub-surface data were collected using boomer; proton magnetometer. These data are archived by BGS. Technical details of the survey are contained in IGS report 70/1.
Information for this survey is sourced from IGS report 70/1. Vessel – modified Port of London Authority workship. Navigation - Decca MK 12 receiver using North Scottish Decca navigation chain. Sampling equipment trials of UMEL corer and shipek grab were conducted, excellent results with grab except on cobble gravel. E.G. and G. boomer system operated at 1000 Joule and fired every 1.5 seconds. Seismic signals were filtered by a 200-800Hz band-pass filter and processed and printed on E.G. and G. Type 254 recorder. Elsec proton magnetometer achieved acceptable performance. Echo-sounder – Bludsworth P.D.R and a Kelvin Hughes M.S.26 in the later part of the survey. The depths were subsequently corrected for tidal variations, adjusted to O.D. Newlyn. Total of 648.6km traversed. Surveys were made at 5 to 6 knots. Much of the survey was carried out in poor weather. For more detailed information see the Cruise Report.
Echo Sounder, Magnetometer, Surface Tow Boomer
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