The Hellenic Navy Hydrographic Service has the following responsibilities:
a. Rendering of elements and information for the operational requirements of the Hellenic Navy and the Hellenic Forces in general.
b. Hydrographic and oceanographic surveying, nautical charting and maritime works and studies as well as apllication of new research programs for the collection of elements and information.
c. Publication and distribution of nautical charts, special naval charts and nautical publications.
d. Issue of Notices to Mariners for the updating of the charts and other nautical publications
e. Issue and promulgation of Radio Navigational Warnings
f. National co-ordinator in the international NAVTEX service for promulgation of Maritime Safety Information in co-operation with the ministry of Mercantile Marine/Joint Rescue Co-ordination Centre, the hellenic Meteorological Service and the Hellenic Telecommunication Organization for the briefing of seamen in accordance with the GMDSS
g. Designation of channels, safety anchorages, restricted areas, dangers to navigation as well as the way of their marking.
h. Maritime study on the installation of lights, lighted or not lighted buoys, landmarks, mooring buoys and navigational radio-aids.
i. Pronouncement over the determination of terrestrial port zones, port works and installations of aquacultures (sea farms).
j. installation of networks of permanent measuring stations for the collection of hydrographic, oceanographic and navigational information.