Combat Systems, Naval Operations, Sea Sciences, Navigation, Electronics and Telecommunications Sector offers the following courses:

• ΝΑVIGATION: 1st, 2nd, 3rd and 4th year of Deck Navy Cadets and 1st year of Engineers Navy Cadets
• APPLIED NAVIGATION: 1st year of Deck and Engineers Navy Cadets
• MILITARY OCEANOGRAPHY: 2nd year of Deck Navy Cadets
• ΝΑVAL WEAPONS: 2nd, 3rd and 4th year of Deck Navy Cadets
• ΝΑVAL OPERATIONS: 3rd and 4th year of Deck Navy Cadets
• ELECTRONICS: 3rd year of Deck and Engineers Navy Cadets
• TELECOMMUNICATIONS: 4th year of Deck and Engineers Navy Cadets