Corrected and smoothed ship gravity, magnetics and bathymetry data acquired by BGS as part of its Offshore Reconnaissance Mapping Programme. This programme was commenced in 1967, funded mainly by the Department of Energy. Corrected and smoothed ship gravity and bathymetry data from various commercial and academic surveys between 1965 and 1994 Confidential MOD (Ministry of Defence) Hydrographic Office integrated ship gravity and magnetics surveys of North West Europe marine areas for which BGS acts as agent. Network adjusted gravity and magnetic compilations of data from BGS and non-BGS sources.