The International Hydrographic Organization, or IHO, is a global entity responsible for promoting safe and efficient navigation by enhancing hydrographic knowledge. Founded in 1921 and headquartered in Monaco, the organization consists of 98 member states (as of 2023), each committed to improving maritime data collection and charting.
Hydrography, the science of measuring and describing physical features of oceans, seas, and coastal areas, is essential for producing navigational charts and supporting maritime operations. The IHO serves as a coordinating body to ensure that hydrographic data collection is standardized and that marine cartography is reliable, timely, and accessible.