This British Geological Survey (BGS) marine geophysical and sampling survey took place in March 2007 in the Firth of Clyde between Holy Loch and Greenock aboard the RV Arora. The purpose was to gather data which could be used for Estuarine Contaminant analysis. Seabed samples were collected with gravity and Craib corers. Sub-surface seismic data were gathered using a surface tow boomer. Most of the data were recorded digitally. Multibeam data was collected on Cruise 2007/4. These data are archived by BGS. Technical details of the survey are contained in BGS Internal Report IR/08/039.