United Nations (UN).

International Maritime Organization (IMO).

Intergovernmental Oceanographic Commission (IOC).

International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA).

International Tribunal for the Law of the Sea (ITLOS).

International Cartographic Association (ICA).

International Society for Photogrammetry and Remote Sensing (ISPRS).

International Federation of Hydrographic Societies (IFHS).

International Federation of Surveyors (Commission 4 - Hydrography) (FIG).

International Steering Committee for Global Map (ISCGM).

International Association of Geodesy (IAG).

International Map Trade Association (IMTA).