The Hellenic Navy Tactical Training School (H.N.T.T.S) is directly subordinate to the Fleet Headquarters. It was founded in 1963 and it is located inside the Skaramangas Naval Base.

Initially it was hosted in Kanellopoulos training center facilities, inside the Skaramangas Naval Base. The reason for its establishment was the necessity of having a simulation system for the training of Commanders and naval Officers in making quick decisions on the battlefield, which would serve both national and allied needs. The installation of the first British-made ACTION SPEED TACTICAL TRAINER (A.S.T.T.) simulator (REDIFON) was completed in 1964. In 1982 the School moved to its current facilities and – in an effort to adopt cutting edge computer aided technology- a new advanced technology Tactical Simulator (A.S.T.T.) was installed. In 2010, the obsolete simulator was uninstalled and HN staff was assigned to develop a modern naval tactical simulator that would meet the future demands of naval training. Indeed, in 2015, H.N.T.T.S was delivered two complete versions of a tactical simulator: one version for the training of HELO/MPA Controllers and another one, which simulates the conduct of all kinds of warfare operations on a warship, thus upgrading the capabilities provided to the training of the Hellenic Fleet personnel.

In June 2022 the inauguration of the new AIRCO DEPARTMENT and the auditorium “Admiral Ioannis Toumpas” took place. The AIRCO DEPARTMENT has a Tactical Simulator for the exclusive training of HELO/MPA Controllers. The auditorium, with its modern audio-visual systems and a capacity of 166 people, provides the possibility of hosting and conducting a multitude of activities such as schools, lectures, meetings, workshops, etc.

The Commandant is in charge of HNTTS’s personnel. He is responsible to the Chief Admiral for the fulfillment of the school’s mission and he is the Director of the school’s Executive Staff.

The Deputy Commander, is the direct assistant of the Commandant, in the execution of his mission and is responsible to him, for the proper administrative and educational operation of the School. For this purpose, he directs, coordinates and controls the work of the staff, making use of his jurisdiction and powers, which derive from his position, rank and status.

The Director of Operations and Tactics is responsible for the study, development and recommendation of new tactics and procedures, as well as the publication of relevant handbooks. At the same time, he participates, in all national seminars, working groups, councils, study groups, meetings which are related to tactical issues. Furthermore, participates in international symposiums and NATO seminars, working groups and councils.

The Director of Training is responsible for meeting the requirements of organizing and conducting any educational activity that takes place at the School and exploiting the conclusions and experiences that result from them. At the same time, he attends and participates in all national and inter-alliance seminars, working groups, councils, study groups and meetings, related to teaching methods/media issues. Furthermore, he is responsible for the coordination of all the HELO/MPA Controllers courses, through the corresponding AIRCO Department.

The Director of Analysis and Statistics is responsible for the Analysis of maritime exercises and operations and the lessons learned. Furthermore, he participates, in all national seminars, working groups, councils, study groups and meetings, related to analysis issues. Finally, he is responsible for introducing new analysis methods and procedures

The Director of Logistics and Support supports all other directorates to fulfill their role, providing the appropriate services (i.e. maintenance and repair of equipment, security, financial support etc).