IHO Assembly

The 4th Session of the International Hydrographic Organization (IHO) Assembly takes place 19–23 April 2026 at the Rainier III Auditorium in Monaco. As the IHO’s highest decision‑making forum, the Assembly brings together member states, industry partners, and hydrographic experts to advance global collaboration in surveying, charting, and marine geospatial standards. 

Across the week, delegates will participate in discussions shaping the future of hydrography, including progress toward S‑100 implementation, national hydrographic capabilities, and evolving charting requirements.