British Geological Survey (BGS) Geophysical Survey 1970/4: North Channel (30/08/1970 to 16/10/1970)

Report: Day, GA, and Sunderland, J. 1970. Cruise Report for MV Surveyor, North Channel Survey. MGU Project 70/04. (IGS Report No 13) Positioning: No information provided in the cruise report. Main Chain Decca presumed with coastal coorrections as necessary Echo Sounding: Presumed to be Kelvin Hughes MS 32 Sonar Systems: EG&G side-scan sonar. Transit sonar (Kelvin Hughes?). Seismic Systems: Sparker System: EG&G sparker system with 263b hydrophone streamer and 254 recorder. Most lines run at 1kJ Gravitymeter: Presumed to be LaCoste and Romberg Air Sea gravity meter. Magnetometer: Presumed to be RVU Barringer magnetometer