The National Geological Repository at BGS stores material from samples which are routinely collected from the seabed during Maritime and Coastguard Agency (MCA) Civil Hydrography Programme (CHP) Hydrographic Instruction (HI) surveys. Seabed sampling is conducted on an approximately 5 km grid with at least one sample being taken in each major textural area identified. All samples are retained and forwarded to BGS.
Information on the samples is logged in H575 sample forms using the Nautical Classification and Folk Classification schemes and this information goes into the production of nautical charts at the United Kingdom Hydrographic Office (UKHO). The H575 forms are also sent to the BGS and archived in the National Geoscience Data Centre (NGDC) and MEDIN Data Archive Centre.
Sample and data access
The sample material and data are a resource that is openly available for further analysis.
- Contact firstname.lastname@example.org to arrange a visit to view or sample the material.
- Locations and sample data will be available from the Offshore GeoIndex in the future. In the meantime, to access the data, email email@example.com with the required HI survey numbers or area of interest.
- The associated multibeam backscatter data are available from the Offshore GeoIndex.
- Multibeam bathymetry data are available from the ADMIRALTY Marine Data Portal.
We have also issued some guidance for the deposit of MCA CHP samples.
Contact firstname.lastname@example.org to arrange a visit to view or sample the material.