This marine sampling survey took place July/August 2006 in the Summer Isles and adjacent lochs of NW Scotland on board the RV Calanus . The survey was a collaboration of the British Geological Survey (BGS) and the Scottish Association for Marine Science (SAMS). The aim was to groundtruth the swath bathymetric and seismic-reflection data that were acquired in 2005, to further define the marine landscape in the Summer Isles region, with a particular focus on the part played by glaciation and subsequent deglacial sedimentary processes in shaping the sea bed. Seabed samples were collected using a gravity corer and megacorer. Technical details of the survey are contained in BGS Internal Report IR/06/106 (http://nora.nerc.ac.uk/id/eprint/7414/) and SAMS Report No.24.