Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1452; Orwell Field, Area in SqKm: 617, (31/07/2014 to 17/09/2014), Standard: IHO S44ed5 Order 1a. Contract: Shallow. FY 2014/15. Contractor: Gardline.