French Research Institute for Exploitation of the Sea - Ifremer (France), Flanders Marine Institute - VLIZ (Belgium), Belgian Marine Data Centre - RBINS-ODNATURE-BMDC (Belgium), Universite de Liege - ULIege (Belgium), Institute of Oceanology of the Bulgarian Academy of Sciences - IO BAS (Bulgaria), Royal Netherlands Institute for Sea Research - NIOZ (Netherlands), International Council for the Exploration of the Sea - ICES (Denmark), Marine Information Service - MARIS (Netherlands), Swedish Meteorological and Hydrological Institute - SMHI (Sweden), Spanish Institute of Oceanography - IEO-CSIC (Spain), Institute of Marine Research - IMR (Norway), National Institute of Oceanography and Applied Geophysics - OGS (Italy), Hellenic Centre for Marine Research - HCMR (Greece), Institute for agricultural and fisheries research - ILVO (Belgium), Deltares (Netherlands), Institute of Meteorology and Water Management - IMGW (Poland), National Oceanography Centre - British Oceanographic Data Centre - NOC-BODC (UK), Federal Maritime and Hydrographic Agency - BSH (Germany), Flemish Ministry of Mobility and Public Works; Agency for Maritime and Coastal Services; Coastal Division (Belgium), Geological Survey of Ireland - GSI (Ireland), Hydrographic Institute of the Navy - IHM (Spain), Portuguese Hydrographic Institute - IH (Portugal), Institute of Marine Sciences - ISMAR (Italy), Portuguese Institute of Ocean and Atmosphere - IPMA (Portugal), Faroese Geological Survey (Faroe Islands), National Oceanography Centre - NOC (UK), Norwegian Hydrographic Service (Norway), OceanWise (UK), Royal Netherlands Navy, Hydrographic Service (Netherlands), GRID Arendal - GRID (Norway), AZTI Tecnalia - AZTI (Spain), Spanish Secretary-General for Fisheries (Spain), Marine Technology Unit - CSIC-UTM (Spain), Task Group for the Extension of the Continental Shelf - EMEPC (Portugal), Norwegian Petroleum Directorate - NPD (Norway), National Institute for Marine Research and Development "Grigore Antipa" - NIMRD (Romania), Alfred Wegener Institute - AWI (Germany), Istituto Superiore per la Protezione e la Ricerca Ambientale - ISPRA (Italy), National Research Council - CNR (Italy), Institute of Oceanography and Fisheries - IOF (Croatia), Latvian Institute of Aquatic Ecology - LHEI (Latvia), Marine Systems Institute - TalTech-MSI (Estonia), Finnish Meteorological Institute - FMI (Finland), Institute of Marine Biology - IMBK (Montenegro), National Institute of Biology - NIB (Slovenia), Israel Oceanographic and Limnological Research - IOLR (Israel), Institute of Marine Science and Management - IU-IMSM (Turkey), National Environmental Agency - NEA (Georgia), Ukrainian Hydrometeorological Institute -UHMI (Ukraine), Institute of Marine Sciences Middle East Technical University - IMS METU (Turkey), Geological Survey of Finland - GTK (Finland), Geological Survey of Sweden - SGU (Sweden), Geological Survey of Norway - NGU (Norway), Geological Survey of Denmark and Greenland - GEUS (Denmark), Iceland GeoSurvey - ISOR (Iceland), Geological Survey of Estonia - EGT (Estonia), Latvian Environment, Geology and Meteorology Centre - LEGMC (Latvia), Lithuanian Geological Survey - LGT (Lithuania), Polish Geological Institute - Natural Reseach Institute - PIG-NRIBMG (Poland), Geological Survey of the Netherlands - TNO (Netherlands), Royal Belgian Institute of Natural Sciences - RBINS (Belgium), Office of Geological and Mining Resources - BRGM (France), Spanish Geological Survey - IGME (Spain), Geological Survey of Slovenia - GeoZS (Slovenia), Geological Survey of Croatia - HGI (Croatia), Geological Survey of Montenegro - GEOZAVOD (Montenegro), Albanian Geological Survey - GSA (Albania), Hellenic Survey of Geology and Mineral Exploration - HSGME (Greece), National Institute of Marine Geology and Geoecology - GeoEcoMar (Romania), Dokuz Eylul University - IMST-DEU (Turkey), Cyprus Geological Survey - GSD (Cyprus), Office of the Prime Minister, Continental Shelf Department - OPM-CSD (Malta), Centre for Environment, Fisheries and Aquaculture Science - CEFAS (UK), Federal Institute for Geosciences and Natural Resources - BGR (Germany), Joint Nature Conservation Committee - JNCC (UK), COGEA (Italy), A.N.D. International - AND (France), Centro Tecnológico del Mar - CETMAR (Spain), Lovell Johns Mapping Company - LJ (UK), Marine Biological Association - MBA (UK), Ukrainian Scientific Center of Ecology of Sea - UkrSCES (Ukraine), Institute of Geological Sciences - NAS of Ukraine - IGS-NAS-UKR (Ukraine), British Geological Survey - BGS (UK), ETT (Italy), Eurofish (Denmark), Rijkswaterstaat Waterdienst - RWS (Netherlands), National Laboratory of Energy and Geology - LNEG (Portugal), SC Marine Research SRL - MR (Romania), Baltic Sea Hydrographic Commission - BSHC (Monaco), Center for Marine Environmental Sciences - MARUM (Germany), GGS Geo Consultancy - GGSGC (Netherlands), Conference of Peripheral Maritime Regions - CRPM (France), Danube Delta National Institute - DDNI (Romania), Geodetic Institute of Slovenia - GIS (Slovenia), Hellenic Navy Hydrographic Service - HNHS (Greece), Italian Hydrographic Institute - IIM (Italy), Regione Lazio - RL (Italy), Maritime Administration of Latvia - MAL (Latvia), Sjöfartsverket – Swedish Maritime Administration - SMA (Sweden), Worldline Company (France), Centre for Marine Sciences - CCMAR (Portugal), Marine Institute (Ireland), Finnish Environment Institute - SYKE (Finland), Danish Centre For Environment And Energy - AU-DCE (Denmark), University of Sheffield (UK), Service Hydrographique et Océanographique de la Marine - SHOM (France), CNR, Institute of Environmental Geology and Geoengineering (IGAG) - CNR-IGAG (Italy), National Interuniversity Consortium for Marine Science - CONISMA (Italy), Coronis Computing SL - Coronis (Spain), Croatian Hydrographic Institute - HHI (Croatia), CSIC-ICM/ Institute of Marine Sciences - CSIC-ICM (Spain), Danish Geodata Agency - Danish Hydrographic Office - GST (Denmark), EOMAP GmbH & Co KG - EOMAP (Germany), Marine Geology and Seafloor Surveying group, Department of Geosciences, University of Malta (Malta), Stockholm University, Department of Geological Sciences - IGV (Sweden), Geological Survey of Israel - GSI (Israel), Directorate for Coast and Sea Sustainability. Ministry for Ecological Transition - MTE-DGSCM (Spain), ORION (Cyprus), Teledyne Marine - RESON (Denmark), Balearic Islands Coastal Observing and Forecasting System - SOCIB (Spain), Iv.Javakhishvili Tbilisi State University, Centre of Relations with UNESCO Oceanological Research Centre and GeoDNA (UNESCO) - TSU-DNA (Georgia), Istituto Nazionale di Geofisica e Vulcanologia, Sede di Bologna - INGV (Italy), Centre for Documentation, Research and Experimentation on Accidental Water Pollution - CEDRE (France), CNR, Institute of Atmospheric Pollution Research - CNR-IIA (Italy), 52°North Spatial Information Research GmbH - 52°North (Germany), Marine and Freshwater Research Institute - MFRI (Iceland), Oceanography Malta Research Group, Department of Geosciences, University of Malta - UM (Malta), Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile (National Agency for new Technology, Energy and Sustainable Economy Development) - ENEA (Italy), Ukrainian scientific center of Ecology of Sea - UkrSCES (Ukraine), National Research Institute For Agriculture, Food And Environment - INRAE (France), University of Bremen - UBremen (Germany), Museum National d'Histoire Naturelle - MNHN (France), EMCOL Research Centre, Istanbul Technical University - ITU EMCOL (Turkey), Edge Hill University - Edge Hill Uni (UK), Foundation for Research and Technology Hellas - Institute of Computer Science - FORTH-ICS (Greece), University of Tartu (Department of Geology) - UNITARTU (Estonia), Sapienza University of Rome - UNIROMA (Italy)