Hellenic Navy Hydrographic Service (HNHS)

Hellenic Navy Hydrographic Service (HNHS) is Greece's official hydrographic organization, responsible for producing and updating nautical charts and publications. It provides essential services for navigation safety, and marine environment protection, and supports national defense operations. HNHS also manages the NAVTEX service, offering navigational warnings and information to mariners. The agency contributes to the development of hydrography, oceanography, and related sciences, ensuring the safe and efficient use of Greek and adjacent seas.