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IHO PORTAL International Hydrographic Organization

Hydrography provides the basis for all activities which involve the sea. 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 in order to promote uniformity in nautical charts and documents. It issues survey best practices and provides guidelines to maximize the use of hydrographic information.

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• About IHO
  • Staff
  • About
  • Member States
  • Basic Documents
  • Circular Letters
  • Assembly
  • Council
  • Finance Information
  • IHO Strategic Plan and Work Programme
  • Projects & Initiatives
  • External Liaisons
  • IHO Disclaimer, Privacy & Copyright Notice
  • Spanish Content
  • Visit Us
• Inter-Regional Coordination
  • Inter-Regional Coordination Committee (IRCC)
  • Regional Hydrographic Commissions (RHCs)
  • Capacity Building & Technical Cooperation
  • Education & Programme Recognition
• Services & Standards
  • Hydrographic Services & Standards Committee (HSSC)
  • Scope of Standardization Activities
  • ENC & ECDIS
  • S-100 Universal Hydrographic Data Model
  • ENC & ECDIS TEST
• Publications
  • Index of IHO Publications
  • International Hydrographic Review
  • IHO Bulletin
  • IHO Online Catalogues
• Events & News
  • IHO Meetings & Events Calendar
  • News
  • Monthly Brief Meeting Reports
  • Social Media
  • IHO 100 Years
  • Events

DOCUMENT ARCHIVE

Recent bulletins

Document

Regional Workshop on the development and implementation of S-100 products. Turkmenbashi, Turkmenistan. 3 to 5 December 2025.

Document

38th Meeting of the IHO-IOC GEBCO Sub-Committee on Undersea Feature Names (SCUFN). Bali, Indonesia. 10 – 14 November 2025.

Document

32nd PRIMAR Advisory Committee. Gdansk, Poland. 4 - 6 November 2025.

Bulletins

News

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Women in Hydrography: New Data Reveal Gains in Leadership, Gaps in Workforce Representation

News

Nominations Open for the MSc in Hydrographic Science

News

Member States Gather in Monaco for the IHO Council Meeting

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News

Women in Hydrography: New Data Reveal Gains in Leadership, Gaps in Workforce Representation

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Nominations Open for the MSc in Hydrographic Science

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