Hellenic Navy Hydrographic Service (HNHS), informs that the exact location of the historical shipwreck of HS 'Katsonis' submarine has been confirmed by optical means 6 nm. northwest of the island of Skiathos at 253 meters depth.

For the fifth consecutive time, the participation of the Hellenic Navy Hydrographic Service (HNHS) at the international shipping exhibition "POSIDONIA" constitutes a very important marketing instrument of its work and activities and marks its multidimensional role in the areas of marine research, the safety of navigation and the protection of the maritime environment.