Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1518; Southern Approach to Sunk TSS, Area in SqKm: 729, (26/01/2017 to 18/05/2017), Standard: IHO S44ed5 Order 1a. Contract: Shallow. FY 2016/17. Contractor: Gardline.