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Geophysical equipment types used included: Echo Sounder, Magnetometer and Surface Tow Boomer. Hunting Geology & Geophysics was contracted to undertake the survey on behalf of British Geological Survey. 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.

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