The primary aim of this survey in Loch Sunart on the 31st May 2016 was to improve knowledge of the occurrence and distribution of the species and habitats in this loch. Dropdown video drifts at 20 stations where used to achieve this, using SEPAs vessel SV Sir John Murray. Further aims of this survey were to monitor the impacts of human activities and undertake inventory sampling to fill 'gaps' in current understanding. This survey contributes to ongoing monitoring of pressures in the Loch by SEPA. Through the analysis of seabed video, the images were used to describe the nature of the seabed in terms of the physical structure and the species assemblages. Runs and run segments were assessed for the presence of protected features and other PMFs, as well as for the presence of species and habitats of recognised conservation importance.