Maritime and Coastguard Agency Civil Hydrography Programme sediment samples

BGS Data – National Geoscience Data Centre

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.

Deposit samples

We have also issued some guidance for the deposit of MCA CHP samples.


Contact to arrange a visit to view or sample the material. 

See Accessing NGR collections if you wish to arrange a visit or sample the material (please deposit any data from analysis carried out on the samples with the NGDC).

Need more information?

For general NGR and NGDC enquiries or to arrange a visit, please phone 0115 936 3143 or contact our enquiries team

You may also be interested in:

Marine geoscience data management

The BGS manages marine geological and geophysical data from the seabed and sub-seabed mainly from the United Kingdom Continental Shelf (UKCS) and adjacent area including MEDIN, SEA and NHDA data.

Show more
MEDIN Data Archive Centre

MEDIN Data Archive Centre

BGS is the accredited Marine Environment Data and Information Network (MEDIN) data archive centre (DAC) for geology, geophysics and backscatter

Show more

Was this page helpful?

  • How can we make this section better?*

  • Please select a reason*

  • How can we make this section better?*