International Association of Marine Aids to Navigation and Lighthouse Authorities. IALA/AISM (http://www.iala-aism.org)

International Maritime Organisation (IMO) (http://www.imo.org)

International Telecommunication Union (ITU) (http://www.itu.ch)

United Nations. Codes (http://www.unece.org/cefact/cef_main.htm)

Spanish Quality Association (http://www.aec.es)

AENOR.Spanish Standards Association (http://www.aenor.es)

Centre for Studies & Experimentation . CEDEX. (http://www.cedex.es)

Catalonian Space Studies Institute (http://www.ieec.fcr.es)

United States Coast Guard - Navigation Center (USCG GPS) (http://www.navcen.uscg.mil/GPS/)

National Astronomical Observatory (http://www.oan.es)

National Geographic Institute l (http://www.geo.ign.es)

Catalonian Cartographic Institute (http://www.icc.es)

National Meteorology Institute (http://www.inm.es)

Lloyd's Register (http://www.lr.org)

National Oceanic and Atmospheric Administration (NOAA) (http://www.noaa.gov)

Intergovernmental Oceanographic Commission (http://www.unesco.org/ioc)

European Space Agency (ESA) (http://www.esrin.esa.it)

European Group of Institutes of Navigation (http://www.nlr.nl/nin/eugin.html)

International Electrotechnical Commission (http://www.iec.ch)

International Hydrographic Organisation (IHO) (http://www.iho.shom.fr)

International Standards Organisation (ISO) (http://www.iso.ch)

International Civil Aviation Organisation (ICAO) (http://www.cam.org/icao)

United Nations Conference on Trade and Development (UNCTAD) (http://www.inicc.org/unctad)

State Sea Rescue Society (SASEMAR) (http://www.sasemar.es)

Spanish Oceanographic Institute (IEO) (http://www.ieo.es)

Naval Hydrographic Institute (IHM) (http://www.armada.mde.es/ihm/IHM_Main.htm)

Directorate General for the Merchant Navy (http://www.mfom.es/marinamercante/)