This marine geophysical survey took place in February/March 2012 in the area of North coast Scotland and Orkney on board the FRV Alba Na Mara. The survey was carried out by the British Geological Survey (BGS) on behalf of Marine Scotland. Sub bottom seismic profiling data were collected using an Applied Acoustics surface tow boomer (STB). These data are archived by BGS and are also available on Marine Scotland Interactive (MSI) - http://www.gov.scot/Topics/marine/science/MSInteractive/Themes/Renewables/Data. Technical details of the survey are contained in the Report of Survey.