IMO is the United Nations specialized agency with responsibility for the safety and security of shipping and the prevention of marine and atmospheric pollution by ships. IMO's work supports the UN sustainable development goals... www.imo.org

The Nautical Institute is a non-governmental organisation (NGO) with consultative status at the International Maritime Organization (IMO). Its aim is to promote professionalism, best practice and safety throughout the maritime industry... www.nautinst.org

The International Hydrographic Organization works to ensure that all the world's seas, oceans and navigable waters are surveyed and charted, thereby supporting safety of navigation and the protection of the marine environment. It coordinates the activities of national hydrographic offices and sets standards... www.iho.int

The aim of ICS is to act as an advocate for the industry on issues of maritime affairs, shipping policy and technical matters, including ship construction, operation, safety and management, and to develop best practice in the industry... www.ics-shipping.org

The International Telecommunication Union (ITU) is the United Nations specialized agency for information and communication technologies – ICTs. Maritime Publications... www.itu.int

The Russian Hydrographic Service (official name Department of Navigation and Oceanography of the Ministry of Defence of the Russian Federation - Russian: Управление навигации и океанографии Министерства обороны Российской Федерации), is Russia's hydrographic office, with responsibility to facilitate navigation, performing hydrographic surveys and publishing nautical charts... https://eng.mil.ru

The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data that helps others to unlock a deeper understanding of the world's oceans... www.admiralty.co.uk

NOAA (USA) has the mission to understand and predict changes in climate, weather, ocean & coasts, share that knowledge & information - conserve & manage coastal and marine ecosystems and resources. NOAA's National Ocean Service provides products, tools, & services to ensure safe passage along US coastal waters... https://noaa.gov - find nautical charts for USA 

The Australian Hydrographic Office (AHO) is part of the Department of Defence. It is responsible for providing Australia’s national charting service under the terms of SOLAS and the Navigation Act 2012 (Cth)... https://hydro.gov.au/

The Canadian Hydrographic Service (CHS)'s nautical charts and publications help ensure the safe navigation of Canada's waterways. Browse the catalogue of over 2.000 nautical charts and publications... https://charts.gc.ca

The Republic of Korea makes a contribution to the International Hydrographic Organization to help developing countries improve their ability to comply with international standards on hydrographic surveying, nautical cartography and ocean observation... www.khoa.go.kr

Europe is proud of its centuries-old maritime traditions and of its unique shipping industry. The European shipping industry is a success story, a geostrategic asset to the EU in the face of global challenges. European shipowners operate one of the largest, youngest, most innovative fleets in the world... https://www.ecsa.eu/

IAPH is a non-governmental organization (NGO) headquartered in Tokyo, Japan, its a global alliance of ports, representing today some 160 ports and 120 port-related businesses in 87 countries. The member ports together handle well over 60% of the world’s sea-borne trade and over 60% of the world container traffic... https://www.iaphworldports.org

John Kohnen's Nautical and Boatbuilding Page is a hobbyist page that contains a great source of websites related to marine vessels and maritime navigation... http://www.boat-links.com

the Lighthouse Directory, providing information and links for more than 23.500 of the world's lighthouses. Latest update February 12... http://www.ibiblio.org/lighthouse/

World sea ports database, sea transportation, marine and ports market place, sea distances and routes. A database of Ports - Information for ports worldwide... http://ports.com/

Weather radar, wind & waves forecast for kiters, surfers, paragliders, pilots, sailors and anyone. Worldwide animated weather map, with easy to use layers - precise spot forecast. METAR, TAF & NOTAMs for any port in the World. SYNOP codes from weather stations & buoys. Forecast models ECMWF, GFS, NAM & NEMS... https://www.windy.com

Wind map with live wind radar & worldwide wind forecast. See live weather reports, wind speed & waves for kite- & windsurfing, sailing, fishing & hiking... https://www.windfinder.com

The shipping industry was one of the first industries to implement comprehensive international safety standards set forth by the International Maritime Organization (IMO). This maritime safety guide condenses the many rules and regulations ensuring safety across marine waterways... https://www.lanierlawfirm.com

Explore, collate and create your own sea map. Learn more about Europe's seas and coasts, their environment, related human activities and European policies... https://ec.europa.eu

HELMEPA (Hellenic Marine Environment Protection Association): is a pioneering voluntary commitment of Greek seafarers and ship owners to safeguard the seas from ship-generated pollution, undertaken in Piraeus Greece, on June 4, 1982... https://www.helmepa.gr

Save the Med foundation's mission is to enable the Mediterranean Sea to recover its rich biodiversity and to thrive in harmony with prospering, environmentally conscious and proactive local populations... https://www.savethemed.org

A worldwide community committed to improving access to geospatial, or location information. OGC connects people, communities, and technology to solve global challenges and address everyday needs. The organization represents over 500 businesses, government agencies, research organizations, and universities united with a desire to make location information FAIR – Findable, Accessible, Interoperable, and Reusable... https://www.ogc.org

The mission of the International Cartographic Association (ICA) is to promote the disciplines and professions of cartography and GIScience in an international context. The aim of ICA is to ensure that cartography and GIScience are employed to maximum effect and full potential for the benefit of society and science through promotion and representation of the disciplines and professions of cartography and GIScience internationally...  https://icaci.org

Maps and location for developers, precise location data and powerful developer tools to change the way we navigate the world... https://www.mapbox.com

Ferry crossings price comparison website for all ferry routes and timetables in Europe, offering ferry tickets booking for all ferry operators... https://www.ferry-tickets.com

Since 1916, the Union of Greek Shipowners (UGS) represents Greek-owned commercial vessels over 3.000 gt under the Greek and other flags. Despite current challenges, Greek shipping represents 58% of the EU - controlled fleet and almost 20% of the world dead-weight capacity... https://ugs.gr

Hellenic Navy Hydrographic Service (HNHS) compiles the official Electronic Navigational Charts (ENCs) of Greece in compliance with the S-57 Ed 3.1 standard of the International Hydrographic Organization - IHO. These charts are intended for professional Electronic Chart Display Information Systems (ECDIS)...
https://www.hnhs.gr

GOOS is an Intergovernmental Oceanographic Commission (IOC)-led programme. The IOC is part of UNESCO. The GOOS Office enables collaboration between different parts of the Core Team. Oversight is provided by a multinational Steering Committee... https://www.goosocean.org

a specialized agency of the United Nations, WMO is dedicated to international cooperation and coordination on the state and behaviour of the Earth’s atmosphere, its interaction with the land and oceans, the weather and climate it produces, and the resulting distribution of water resources... https://public.wmo.int/en

Hydro International is the leading worldwide magazine focusing on hydrography. HYDRO provides a wide variety of information about all the major topics in hydrography: Hydrographic surveys, Oceanography, Sensor technology, Electronic charting, ROVs, AUVs & USVs... https://www.hydro-international.com

IC- ENC Community of National Hydrographic Organisations who are working closely together in order to establish a combined quality ENC-Database at a low cost. IC- ENC is co-operating with its commercial partners who provide a variety of world-wide "one-stop-shopping" services to the mariners... http://www.ic-enc.com/

Shippax: a leading provider of extensive and comprehensive Ferry, Cruise and ro-ro information. Nearly 50 years of experience as a publisher of ferries and shipping related statistical data, company reviews, analytical annuals, and a monthly maritime magazine and shipping news... https://www.shippax.com/

EuroGOOS identifies priorities, enhances cooperation and promotes the benefits of operational oceanography to ensure sustained observations are made in Europe’s seas underpinning a suite of fit-for-purpose products and services for marine and maritime end-users... https://eurogoos.eu/

Provides global maritime geospatial intelligence in support of national security objectives, including safety of navigation, international obligations, and joint military operations. Notice to Mariners, Publications, Navigational Warnings, Piracy, Maritime Products Catalogs, Nautical Calculators... https://msi.nga.mil/

ESRI is a global market leader in geographic information system (GIS) software, location intelligence, and mapping. Since 1969, ESRI has supported customers with geographic science and geospatial analytics... https://www.esri.com