The Minister of National Defence Panos Kammenos  accompanied by the Chief of the Hellenic National Defence General Staff  Admiral Evangelos Apostolakis HN  the Chief of the Hellenic Army General Staff  Lieutenant General Alkiviadis Stefanis and the Chief of the Hellenic Navy General Staff  Vice Admiral Nikolaos Tsounis HN  attended the official celebration for the Patron Saint of the Hellenic Navy and Merchant Navy  Saint Nicholas  which took place at the Naval Academy in Piraeus