This marine geophysical survey took place in January 2010 in Loch Linnhe on board the RV Calanus. The survey was carried out by the British Geological Survey (BGS) in collaboration with the Scottish Association for Marine Science (SAMS). A series of short (1.7 - 18km) survey profiles were acquired from Loch Linnhe to provide a better understanding of glacial features observed during a multibeam echosounder survey in February 2009. Sub-seabed seismic profiling data were collected using a Applied Acoustics Surface Tow Boomer. These data are archived by BGS. Paper records were also generated and these are held by SAMS. Technical details of the survey are contained in BGS Commissioned Report CR/10/046 (http://nora.nerc.ac.uk/id/eprint/528419/). GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2010_1_SAMS&;.