Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1392; Approaches to Inner Sound, Area in SqKm: 342, (15/11/2011 to 30/07/2012), Standard: IHO S44ed5 Order 1a. Contract: Medium (2011). FY 2012/13. Contractor: NetSurvey.