Directorate of Hydrography and Navigation (Diretoria de Hidrografia e Navegação DHN), Brazilian Navy

Directorate of Hydrography and Navigation, or the Brazilian Navy Hydrographic Center (DHN) is a vital institution within the Brazilian Navy, responsible for hydrographic and oceanographic activities. It produces nautical charts, tide tables, and other navigational aids essential for maritime safety. The DHN also conducts research and surveys to support naval operations and contribute to scientific knowledge. Its mission includes ensuring safe navigation, supporting national defense, and promoting the sustainable use of marine resources.