Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1522; Thames Routine Resurvey 2016, TE6a Black Deep Focused Area 2 Extended, Area in SqKm: 5; TE6a Black Deep Focused Area 1, Area in SqKm: 5; TE5a Trinity DW & Long Sand Focused Area, Area in SqKm: 11; TE5a Sunk DW Focused Area, Area in SqKm: 4; TE3a Sunk Full Focused Area, Area in SqKm: 20; TE2a North Shipwash, Area in SqKm: 12; TE8 Rough Shoals, Area in SqKm: 64; TE10 Buxey Sand, Area in SqKm: 72, (06/07/2016 to 29/10/2016), Standard: IHO S44ed5 Order 1a. Contract: RRS (2016/17). FY 2016/17. Contractor: EGS.