International Hydrographic Organisation (IHO) World Hydrographic Day
“Seabed Mapping: Enabling Ocean Action”
21 June 2025
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The 2025 theme is selected to highlight the interrelation of the IHO Strategic Plan Goal 3, "Participating actively in international initiatives related to the knowledge and sustainable use of the Ocean" and the tenants of Goal 2, "Increasing the use of hydrographic data for the benefit of society. The theme additionally highlights the importance of ocean mapping as the Key to enable ocean action in full alignment with the theme of the next United Nations Ocean Conference "Accelerating action and mobilizing all actors to conserve and sustainability of the oceans" taking place in Nice, France in 2025. The theme reaffirms the commitment of the international hydrographic community as a relevant partner in the global aspirations for the conservation and sustainable use of the oceans, sea and marine resources for sustainable development.
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In November 2005, the United Nations adopted Resolution A/60/30, which includes the statement:
“…Welcomes the adoption by the International Hydrographic Organization of the World Hydrography Day, to be celebrated annually on 21 June, with the aim of giving suitable publicity to its work at all level and of increasing the coverage of hydrographic information on a global basis, and urges all States to work with that organization to promote safe navigation, especially in the areas of international navigation, ports and where there are vulnerable or protected marine areas.”
The World Hydrographic Day (WHD) theme, as in previous years, is intended to provide a broad range of opportunities to publicize the hydrographic work and services provided by national hydrographic offices, industry stakeholders and expert contributors, as well as the scientific community. The relevant topics include, but are not limited to:
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All commercial shipping is now going fully digital.
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To complete our image of the earth and make best use of it.
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The Work and Contribution of Hydrographers.
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100th anniversary of the formation of the International Hydrographic Organisation (IHO).
In support of
WHD 2023, the IHO Secretariat will feed the IHO Facebook page, Twitter
account, LinkedIn account and YouTube channel. In addition, the IHO
Secretariat will organize a dedicated page on the IHO website, where papers
and other material relevant to the celebration will be posted. Member States
and Stakeholders are invited to forward to the Secretariat any material that
they may create in support of their national WHD 2021 celebrations for
posting on any of these platforms.
Additional information can be found on the IHO website.