Samples and associated geological data are held at the British Geological Survey for Maritime Coastguard Agency (MCA), Civil Hydrography Programme (CHP), Bathymetric Survey HI1255; Approaches to Stornoway, Area in SqKm: 110; Approaches to Stornoway Extension B, Area in SqKm: 1; Approaches to Stornoway Extension A, Area in SqKm: 1, (28/02/2008 to 24/03/2008), Standard: IHO S44ed4 Order 1. Contract: RRS (2006 LT). FY 2007/08. Contractor: MMT.