Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1494; Southwold to Gt Yarmouth, Area in SqKm: 463, (06/11/2016 to 29/01/2017), Standard: IHO S44ed5 Order 1a. Contract: Shallow. FY 2016/17. Contractor: Gardline.