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Eastern Atlantic HC

Circular Letters 2026

SCRUM10

Southampton, United Kingdom  (National Oceanography Centre)  Hybrid Meeting 26 October 2022 09:00 - 10:30 (UTC +1)

S-129PT4 (2019)

4th meeting of S-129 UKCM Project Team  26 September 2019 / Monaco

NIPWG - Bringing Land and Sea Together (BLAST) - SNPWG Participation.

Standardization of Nautical Publications Information Working Group (SNPWG) Information Page (In English Only)

Navigation Warnings on the Web

The following map shows the limits of the 21 Operational NAVAREAs.   NAVAREA Implementation Status and links to NAVAREA Coordinators’ website https://iho.int/en/iridium-safetycast-implementation-status (Note not all NAVAREA Coordinators publish warnings on the World Wide Web, some only provide Notice to Mariners.) Click here for a full list of contact details for all NAVAREA Coordinators  NB The availability of Navigational Warnings on the web does not relieve Masters / Captains of the requirement to receive Navigational Warnings via IMO/IHO approved broadcast systems, as websites are not continuously updated and not necessarily monitored for correctness.

GGC39

XXXIXth Meeting of the GEBCO Guiding Committee (GGC39) National Oceanography Centre, Southampton, UK, 31 October - 1 November 2022   Note: This event follows the GEBCO Map the Gaps Annual Symposium being held at the same location 26 - 28 October 2022. For more info click here

Cartas Circulares y Documentos de la Asamblea

Brochure, presentation & videos

The Brochure The IH Brochure provides a brief outline of the activities of the International Hydrographic Organization.  It is written for a wide audience, catering to all those that have an interest in the safe and efficient navigation of ships, protection of the marine environment and more generally to the improvement of the global economy through the provision of hydrographic services and products.  For further information, see IHO Publication M-2. ​ English ​ French      Ocean conservation focus ​ English   French   Spanish   The Presentation The IHO Secretariat has produced a generic presentation that desribes the importance of hydrography.  The presentation can be downloaded and used as needed. ​   Videos Hydrography involves measuring the depth of the water and fixing the position of all the navigational hazards that lie on the seafloor, such as wrecks and rocks. This is done mainly with specialised ships and boats operating echo sounders and sonars, but also using survey aircraft fitted with lasers. Useful information can also be derived sometimes from satellite observations. Hydrography also involves measuring the tide and the currents. The most well-known application of hydrographic information is for making the nautical charts that all mariners use for navigation. Hydrographic information is required for the safe, efficient and sustainable conduct of every human activity that takes place in, on or under the sea. These videos provide information on the importance of hydrography. ________________________________________________________