| ASEAN |
Association of South East Asian Nations |
| ATCM |
Antarctic Treaty Consultative Meeting |
| AWI |
Alfred-Wegener Institute for Polar and Marine Research, Germany |
| ABLOS |
IHO-IAG Advisory Board on the Law of the Sea |
| ATCP |
Antarctic Treaty Consultative Party |
| BSHC |
Baltic Sea Hydrographic Commission |
| BSH |
Bundesamt für Seeschifffahrt und Hydrographie |
| CBC |
IHO Capacity Building Committee |
| C&SMWG |
IHO Colours and Symbols Maintenance Working Group |
| CCIR |
International Radio Consultative Committee |
| CGOM |
IOC Consultative Group on Ocean Mapping |
| CHRIS |
IHO Committee on Hydrographic Requirements for Information Systems (CHRIS) (now HSSC) |
| CHS |
Canadian Hydrographic Service |
| COMSAR |
IMO Sub-Committee on Radiocommunications and Search and Rescue |
| CPRNW |
IHO Commission on Promulgation of Radio Navigational Warnings (now WWNWS Sub Committee) |
| CSPCWG |
Chart Standardization and Paper Chart WG |
| DCDB |
IHO Data Center for Digital Bathymetry (DCDB) |
| DOALOS |
Division for Ocean Affairs and the Law of the Sea |
| DQWG |
IHO Data Quality Working Group |
| EAHC |
East Asia Hydrographic Commission |
| EAtHC |
Eastern Atlantic Hydrographic Commission (EAtHC) |
| ECDIS |
Electronic Chart Display Information System |
| FAO |
Food and Agriculture Organization of the United Nations |
| GBE |
GEBCO Bathymetric Editor |
| GDA |
GEBCO Digital Atlas |
| GEBCO |
General Bathymetric Chart of the Oceans |
| GIS |
Geographic Information System |
| GLOSS |
Global Sea-Level Observing System |
| GMDSS |
Global Maritime Distress and Safety System |
| GOOS |
Global Ocean Observing System |
| GPS |
Global Positioning System |
| HCA |
IHO Hydrographic Commission on Antarctica |
| HCIWWG |
IHO Hydrography & Cartography in Inland Waters WG |
| HGMIO |
IHO Harmonization Group on Marine Information Overlays |
| HNODC |
Hellenic National Oceanographic Data Centre |
| HO |
Hydrographic Office |
| HSSC |
IHO Services and Standards Committee |
| IAATO |
International Association of Antarctic Tour Operators (IAATO) |
| IAEA |
International Atomic Energy Agency |
| IALA |
International Association of Marine Aids to Navigation and Lighthouse Authorities |
| IBC |
International Bathymetric Chart |
| IBCAO |
International Bathymetric Chart of the Arctic Ocean |
| IBCCA |
International Bathymetric Chart of the Caribbean Sea and the Gulf of Mexico |
| IBCEA |
International Bathymetric Chart of the Central Eastern Atlantic |
| IBCM |
International Bathymetric Chart of the Mediterranean and its Geological/Geophysical Series |
| IBCSEP |
International Bathymetric Chart of the South Eastern Pacific |
| IBCWIO |
International Bathymetric Chart of the Western Indian Ocean |
| IBCWP |
International Bathymetric Chart of the Western Pacific |
| ICA |
International Cartographic Association |
| ICAO |
International Civil Aviation Organization |
| ICES |
International Council for the Exploration of the Sea |
| ICSEM |
International Commission for the Scientific Exploration of the Mediterranean (ICSEM) |
| IEC |
International Electrotechnical Commission |
| IFREMER |
Institut français de recherche pour l'exploitation de la mer |
| IGU |
International Geographical Union |
| IHB |
International Hydrographic Bureau |
| IHO |
International Hydrographic Organization |
| IMA |
International Maritime Academy |
| IMO |
International Maritime Organization |
| INMARSAT |
International Maritime Satellite Organization |
| IOC |
Intergovernmental Oceanographic Commission |
| IRCC |
IHO Inter-Regional Coordination Committee |
| ISO |
International Organization for Standardization |
| ISPWG |
IHO Strategic Plan WG |
| IUGG |
International Union of Geodesy and Geophysics |
| IUGS |
International Union of Geological Sciences |
| JODC |
Japan Oceanographic Data Centre |
| KODC |
Korea Oceanographic Data Centre |
| LAC |
IHO Legal Advisory Committee |
| LADS |
Laser Airborne Depth Sounder |
| LAT |
Lowest Astronomical Tides |
| LES |
Land Earth Station (Inmarsat term) |
| LORAN |
Long Range Navigation |
| LOS |
Law of the Sea |
| MACHC |
Meso-American and Caribbean Sea Hydrographic Commission |
| MBSHC |
Mediterranean and Black Seas Hydrographic Commission (MBSHC) |
| MEPC |
IMO Marine Environment Protection Committee |
| MoHWG |
IHO Manual on Hydrography Working Group |
| MSC |
IMO Maritime Safety Committee |
| MSDIWG |
IHO Marine Spatial Data Infrastructure WG |
| NAV |
IMO Sub-Committee on Safety of Navigation |
| NGDC |
National Geophysical Data Center |
| NHC |
Nordic Hydrographic Commission |
| NIOHC |
North Indian Ocean Hydrographic Commission |
| NOAA |
National Oceanic and Atmospheric Administration |
| NOS |
National Ocean Service |
| NSHC |
North Sea Hydrographic Commission |
| NZOI |
New Zealand Oceanographic Institute |
| OCIMF |
Oil Companies International Marine Forum |
| OCM |
Ocean Colour Monitor |
| OEF |
Open ECDIS Forum |
| OOS |
Ocean Observing System |
| PAIGH |
Pan American Institute of Geography and History |
| PERSGA |
Regional Organization for Conservation of the Environment and the Red Sea and Gulf of Aden |
| PSMSL |
Permanent Service for Mean Sea-Level |
| QC |
Quality Control |
| R/V |
Research Vessel |
| RAN |
Royal Australian Navy |
| RCSSMRS |
Regional Centre for Services in Surveying, Mapping and Remote Sensing |
| RNZN |
Royal New Zealand Navy |
| RODC |
Regional Oceanographic Data Centre |
| ROPME |
Regional Organisation for the Protection of the Marine Environment |
| RSAHC |
ROPME Sea Area Hydrographic Commission |
| SAIHC |
Southern Africa and Islands Hydrographic Commission |
| SCALOP |
Standing Committee on Antarctic Logistics and Operations |
| SCAR |
Scientific Committee on Antarctic Research |
| SCDB |
Sub-Committee on Digital Bathymetry |
| SCUFN |
Sub-Committee on Undersea Feature Names |
| SEPHC |
South-East Pacific Hydrographic Commission |
| SHOM |
Service Hydrographique et Océanographique de la Marine (France) |
| SIO |
Scripps Institution of Oceanography (Calif., USA) |
| SNPWG |
IHO Standardisation of Nautical Publications Working Group |
| SOLAS |
International Convention for the Safety of Life at Sea |
| SWAtHC |
South West Atlantic Hyrographic Commission |
| SWPHC |
South-West Pacific Hydrographic Commission |
| TCC |
IMO Technical Cooperation Committee |
| TSMAD |
IHO Transfer Standard Maintenance and Application Development Working Group |
| TWG |
Tidal Working Group |
| UKHO |
Hydrographic Office of the UK |
| UNCLOS |
United Nations Convention on the Law of the Sea |
| UNESCO |
United Nations Educational, Scientific and Cultural Organization |
| USBGN |
United States Board on Geographic Names |
| USCG |
United States Coast Guard |
| USCHC |
US/Canada Hydrographic Commission |
| USNODC |
United States National Oceanographic Data Center |
| USNOO |
United States Naval Oceanographic Office |
| VHO |
Volunteering Hydrographic Office |
| WEND |
IHO Worldwide Electronic Navigational Chart Data Base Committee |
| WEND TG |
WEND Task Group |
| WG |
Working Group |
| WGGI |
Working Group on Geodesy and Geographic Information |
| WGS |
World Geodetic System |
| WOCE |
World Ocean Circulation Experiment |
| WVS |
World Vector Shoreline |
| WWNWS |
IHO Sub Committee on the World Wide Navigation Warning Service |
| XBT |
Expendable Bathythermograph |
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