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North Indian Ocean HC

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East Asia HC

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US / Canada HC

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External Liaisons

Inter-Governmental Organizations and Non-Governmental Organizations are recognized as observers to be invited to meetings of the Assembly and all subsidiary organs and subordinate bodies of the IHO in which they have an interest and to which they can make a contribution. The IHO maintains a substantive number of Memoranda of Understanding and Co-operative Agreements with relevant organizations active in the maritime domain.

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Become a Member State

How to join the IHO to become a member state?

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Policy on the Use of IHO Logos, Branding, and Materials by External Stakeholders

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News

Ex Abyssis ad Alta – IHO Award for Hydrographic Excellence 2025

With a hydrographic career spanning over 25 years, the winner of this year’s Ex Abyssis Ad Alta Award has consistently demonstrated technical expertise, and an unwavering commitment to innovation in hydrography in support of safer and smarter navigation. He has also been a central force in moving the S-100 implementation forward.

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Ex Abyssis ad Alta – IHO Award for Hydrographic Excellence 2025

Side Event: Global Ocean Data Sharing

A Key Enabler to Inform Science, Management, and Policy Development   This high-level networking event will discuss why and how the public and private sectors can contribute ocean depth data.

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Side Event: Global Ocean Data Sharing

SAIHC19 (2023)

SAIHC19 Plenary 28th -  31 st August 2023/ Mauritius

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