October 16, 2025

World Hydrography Day

Celebrated on 21 June

  • Theme : Hydrographic Information – Enhancing Safety, Efficiency and Sustainability in Marine Activities.
  • Aim : to raise awareness on the importance of hydrography in improving our knowledge and understanding of the seas and oceans.
  • It was adopted by the International Hydrographic Organisation (IHO).

ABOUT IHO

  • The International Hydrographic Organization (IHO) is an intergovernmental organization that works to ensure the world’s seas, oceans and navigable waters are properly surveyed and charted.
  • Established in 1921
  • Headquarters
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