Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1218; Approaches to Orkneys (Blocks 1-3), Area in SqKm: 1943; Approaches to Orkneys (Block 4), Area in SqKm: 612; Long Sand Head (A), Area in SqKm: 8, (03/06/2007 to 13/08/2007), Standard: IHO S44ed4 Order 1. Contract: ETV. FY 2006/07. Contractor: NetSurvey.