Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1112; Approaches to Lowestoft, Area in SqKm: 7, (24/05/2005 to 26/05/2005), Standard: IHO S44ed4 Order 1. Contract: RRS (2005/06). FY 2005/06. Contractor: RN (NP1016).