- ADCP
- Acoustic Doppler Current Profiler
- ADRAMMAR
- Association pour le Développement de la Recherche en Archéologie MARitime (France)
- AEA
- Association for Environmental Archaeology
- AFBI
- Agri-Food & Biosciences Institute (UK – Northern Ireland)
- ALSF
- Aggregates Levy Sustainability Fund
- AMCG
- Applied Modelling Computation Group
- AMH
- Anatomically Modern Humans
- AOCGCM
- Atmosphere-Ocean Coupled General Circulation Models
- AOGCM
- Atmosphere-Ocean General Circulation Model
- ARQUA
- Museo Nacional de Arqueología Subacuática (Spain)
- AWI
- Alfred Wegener Institute
- BGR
- Bundesanstalt für Geowissenschaften und Rohstoffe (Germany)
- BGS
- British Geological Survey
- BIFROST
- Baseline Inferences from Fennoscandian Rebound Observations, Sea-level and Tectonics
- BIL
- Baltic Ice Lake
- BMAPA
- British Marine Aggregate Producers Association
- BODC
- British Oceanographic Data Centre
- BP
- Before Present
- BRGM
- Bureau de Recherches Géologiques et Minières (France)
- BSBD
- Baltic Sea Bathymetry Database
- BSH
- Bundesamt für Seeschiffahrt und Hydrographie (Germany)
- BSHC
- Baltic Sea Hydrographic Commission
- BSL
- Below Sea Level
- BUGCEP
- Bugs Coleopteran Ecology Package
- CANDHIS
- Centre d'Archivage National de Données de Houle In Situ (France)
- CARG
- Cartografia Geologica project (Italy)
- CAS
- Centre d'Arqueologia Subaquàtica (and various branches thereof) (Spain)
- CCO
- Channel Coastal Observatory
- CERSAT
- Centre ERS d'Archivage et de Traitement (France)
- CGMW
- Commission for the Geological Map of the World
- CHP
- Civil Hydrography Programme (United Kingdom)
- CIESM
- Commission Internationale pour l'Exploration Scientifique de la mer Méditerranée
- CMIPS
- Climate Model Intercomparison Project
- CNR
- Consiglio Nazionale delle Ricerche (Italy)
- CNRS
- Centre National de la Recherche Scientifique (France)
- CReAAH
- Centre de Recherche en Archéologie, Archéosciences, Histoire (France)
- D-O
- Dansgaard-Oeschger (events)
- DAERA
- Department of Agriculture, Environment and Rural Affairs (UK – Northern Ireland)
- DBEIS
- Department for Business, Energy and Industrial Strategy (UK)
- DEM
- Digital Elevation Model
- DESM
- Dynamic Equilibrium Shore Model
- DG MARE
- Directorate-General for Maritime Affairs and Fisheries
- DISPERSE
- Dynamic Landscapes, Coastal Environments and Human Dispersals
- DLS
- Disappearance of Lacustrine Species
- DOENI
- Department of Environment, Northern Ireland (now the DAERA)
- DRASSM
- Département des Recherches Archéo-logiques Subaquatiques et Sous-Marines (France)
- DSDP
- Deep Sea Drilling Project
- DSM
- Digital Surface Model
- DSWC
- Dense Shelf Water Cascading
- DTM
- Digital Terrain Model
- ECDIS
- Electronic Chart and Display System
- ECMWF
- European Centre for Medium-Range Weather Forecasts
- EMODnet
- European Marine Observation and Data Network
- ERDF
- European Regional Development Fund
- ESEAS
- European Sea-Level Service
- ESL
- Equivalent Sea Level
- ESM
- Earth System Model
- ESRI
- Environmental Systems Research Institute
- EUROSION
- European initiative for sustainable coastal erosion management
- FAGS
- Federation of Astronomical and Geophysical Data Analysis Services
- FOMAR
- Fondos Marinos
- GEBCO
- General Bathymetric Chart of the Oceans
- GEUS
- Geological Survey of Denmark and Greenland
- GIA
- Glacio-Isostatic Adjustment
- GIS
- Geographic Information System
- GMP
- Galicia Mud Patch
- GPS
- Global Positioning System
- GSHHG
- Global Self-consistent, Hierarchical, High-resolution Geography Database
- GSI
- Geological Survey of Ireland
- GSNI
- Geological Survey of Northern Ireland
- HSC
- Historic Seascape Characterization
- IBCM
- International Bathymetric Chart of the Mediterranean
- ICGC
- Institut Cartogràfic i Geològic de Catalunya (Spain)
- IFREMER
- Institut Français de Recherche pour l'Exploitation de la Mer (France)
- IGCP
- International Geoscience Programme
- IGM
- Istituto Geografico Militare (Italy)
- IGME
- Instituto Geológico Y Minero de España (Spain)
- IGN
- (a) Institut national de l'information géographique et forestière (France)
- (b) Instituto Geográfico Nacional (Spain)
- IGP
- Instituto Geográfico Português (Portugal)
- IHO
- International Hydrographic Organization
- IKAW
- Indicative Map of Archaeological Values
- IKUWA
- International Congress on Underwater Archaeology
- IMI
- Initial Marine Inflow
- INFOMAR
- The INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource
- INIS-Hydro
- Ireland-Northern Ireland-Scotland Hy-drographic survey
- INQUA
- The International Union for Quaternary Science
- INTIMATE
- INTegration of Ice-core, MArine and TErrestrial records group
- IOC
- Intergovernmental Oceanographic Co-mmission
- IOLR
- Israel Oceanographic and Limnological Research Institute
- IORAS
- Institute of Oceanology Russian Academy of Sciences
- IPEAN
- Irish Palaeoecology and Environmental Archaeology Network
- IPMA
- Instituto Português do Mar e da Atmosfera (Portugal)
- IPOL
- Irish Pollen Database
- IQUA
- Irish Quaternary Association
- IRD
- Ice Rafted Debris
- ISPRA
- Istituto Superiore per la Protezione e la Ricerca Ambientale (Italy)
- JIBS
- Joint Irish Bathymetric Survey (Northern Ireland, Republic of Ireland)
- JNCC
- Joint Nature Conservation Committee (UK)
- KF
- Kephallinia Transform Fault
- LAT
- Lowest Astronomical Tide
- LEGOS
- Laboratoire d'Etudes en Géophysique et Océanographie Spatiales (France)
- LGC
- Last Glacial Cycle
- LGM
- Last Glacial Maximum
- LGP
- Last Glacial Period
- LIA
- Little Ice Age
- LiDAR
- Light Detection and Ranging
- LM
- Local Magnitude
- LNEG
- Laboratório Nacional de Energia e Geologia (Portugal)
- LPS
- Land and Property Services (UK – Northern Ireland)
- LST
- (a) Low System Tracts (b) Littoral Sand Transport (c) Longshore Transport
- MAD
- (a) Marine Aggregate Deposits (b) Mid Atlantic Depression
- MAGIC
- Marine Geohazards along the Italian Coasts (Italy)
- MAI
- Marine Aggregate Industry (Protocol)
- MAREMAP
- Marine Environmental Mapping Programme
- MBES
- Multibeam Echosounder
- MCA
- (a) Maritime and Coastguard Agency (UK) (b) Medieval Climate Anomaly
- MEDFLOOD
- MEDiterranean sea level change and projection for future FLOODing
- MEDIN
- Marine Environmental Data & Information Network (UK)
- MFS
- Mediterranean ocean Forecasting System
- MGCZ
- Mid-German Crystalline Zone
- MHWS
- Mean High Water Spring
- MI
- Marine Institute (Republic of Ireland)
- MIS
- Marine Isotope Stage
- MONGOOS
- Mediterranean Oceanography Net-work for the Global Ocean Observing System
- MoU
- Memorandum of Understanding
- MWP
- Meltwater Pulse
- NADW
- North Atlantic Deep Water
- NAF
- North Anatolian Fault
- NAO
- North Atlantic Oscillation
- NASA
- National Aeronautics and Space Administration (USA)
- NASU
- National Academy of Science of Ukraine
- NAT
- North Aegean Trough
- NCEI
- National Centers for Environmental Information (formerly the NGDC) (USA)
- NERC
- Natural Environment Research Council (UK)
- NGDC
- National Geophysical Data Center (now the NCEI) (USA)
- NGU
- Norwegian Geological Survey
- NIEA
- Northern Ireland Environment Agency
- NOAA
- National Oceanic and Atmospheric Administration (USA)
- NOC
- National Oceanography Centre (UK)
- OIS
- Oxygen Isotope Stage
- OPW
- Office of Public Works (Republic of Ireland)
- ORPAD
- Offshore Renewables Protocol for Archaeological Discoveries
- OS
- Ordnance Survey (UK)
- OSI
- Ordnance Survey of Ireland (Republic of Ireland)
- PALSEA2
- PALeo-constraints on SEA-level rise 2
- PCN
- Portale Cartografico Nazionale (Italy)
- PISCES
- Partnerships Involving Stakeholders in the Celtic Sea Eco-System
- POL
- Proudman Oceanographic Laboratories (now NOC – Liverpool)
- PPNC
- Pre-Pottery Neolithic
- PSL
- Present Sea Level
- PSMSL
- Permanent Service for Mean Sea Level
- PSU
- Practical Salinity Unit
- PWMCF
- Portuguese Western Meso-Cenozoic Fringe
- QRA
- Quaternary Research Association
- RCDS
- Raster Chart Display System
- RCZAS
- Rapid Coastal Zone Assessment Surveys
- REC
- Regional Environmental Characterization
- RSL
- Relative sea-level
- SBES
- Single-Beam Echosounder
- SBR
- Station biologique de Roscoff (France)
- SCAPE
- Scottish Coastal Archaeology and the Problem of Erosion
- SCOPAC
- Standing Conference on Problems Associated with the Coastline (UK)
- SEA
- Strategic Environment Assessment
- SELRC
- Severn Estuary Levels Research Committee
- SGF
- Société Géologique de France
- SHOM
- Service Hydrographique et Océano-graphique de la Marine (France)
- SISMER
- Systèmes d'Informations Scientifiques pour la Mer (France)
- SLE
- Sea-Level Equation
- SLIPs
- Sea-Level Index Points
- SNIRH
- Sistema Nacional de Informação de Recursos Hídricos (Portugal)
- SOMLIT
- Service d'Observation du Milieu Littoral (France)
- SPLASHCOS
- Submerged Prehistoric Archaeology and Landscapes of the Continental Shelf
- SRGE
- State Regional Geologic Enterprise (Ukraine)
- SST
- Sea Surface Temperature
- TEN-T
- (EU) Trans-European Transport Network
- TEOS-10
- Thermodynamic Equation of Seawater 2010
- UKHO
- United Kingdom Hydrographic Office
- UKMMAS
- UK Marine Monitoring and Assessment Strategy
- UkrSCES
- Ukrainian Scientific Center of Ecology of the Sea
- UNESCO
- United Nations Educational, Scientific and Cultural Organization
- VLIZ
- Vlaams Instituut voor de Zee (Netherlands)
- WEAO
- Western European Armaments Organi-sation
- WMS
- Web Map Services
- XIOM
- Xarxa d'Instruments Oceanogràfics i Meteorològics (Spain)