Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1417; Western Approach to North Hinder, Area in SqKm: 220, (15/04/2013 to 30/04/2013), Standard: IHO S44ed5 Order 1a. Contract: Medium. FY 2013/14. Contractor: MMT UK.