Inland Waterways – suspended since January 2013 – Syrian General Directorate of Ports - suspended since 1 June 2018 Footnotes External links International Hydrographic Organization Australian Hydrographic Office Hong Kong Hydrographic Office Indian Naval Hydrographic Department Hydrographic and Oceanographic Department (Japan) Bundesamt für Seeschiffahrt und Hydrographie (Germany) United Kingdom Hydrographic Office National Oceanic and Atmospheric Administration (United States) Servicio Hidrográfico y Oceanográfico de la Armada (Chile) Sjöfartsverket (Sweden) Service Hydrographique et Océanographique de la Marine (France) Canadian Hydrographic Service Primar ENC Service s Hydrography division of Kort & Matrikelstyrelsen (Denmark) Hellenic Navy Hydrographic Service Hydrography organizations Hydro Hydro Navigation organizations