Mediterranean Marine Data is a CNR – ENEA (Italian institutes of research) collaborative Initiative, property and download services will remain in the ‘product owner portal’ (various producers). The aim of MMD is to archive and distribute oceanographic data and information. These data include physical, biological, and chemical measurements from in situ oceanographic observations in coastal and deep ocean areas. Through MMD archive and access services, these ocean data are used to answer questions about climate change, ocean phenomena, and management of coastal and marine resources, marine transportation, recreation, national security.