Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1333; Hesker Island to Galland Head, Area in SqKm: 999, (17/05/2010 to 16/05/2011), Standard: IHO S44ed5 Order 1a. Contract: Medium (LT). FY 2010/11. Contractor: Gardline.