This British Geological Survey (BGS) marine geophysical survey took place in September 2010 in the area SW of Little Cumbrae Island, Scotland on board the RV White Ribbon. The purpose was to contribute to the geological interpretations for the Marine Environmental Mapping Programme (MAREMAP) and the Clyde Basin Project. Multibeam bathymetry data were collected using a Kongsberg EM3002D. The data are archived by BGS. Technical details of the survey are contained in survey operations documentation.