Former Cadet Petty Οfficers extend their studies for a period ranging from 9 to 12 months in the Hellenic Navy’s Petty Οfficers’ Academy after their graduation and oath-taking as Petty Officers First Class, in order to be granted with the Specialization Diploma.
The number of Petty Officers First Class for each specialization is determined by the Hellenic Navy General Staff according to the needs of the Hellenic Navy.
For each specialty, the corresponding specializations are listed below:
| SPECIALTY | SPECIALIZATION |
| SUPPLY PETTY OFFICERS | LOGISTICS MANAGER |
| ACCOUNTING MANAGER | |
| BOSUN’S MATE | BOSUN’S MATE |
| OPERATIONS / COMMUNICATIONS SPECIALIST | RADΑR OPERATOR |
| INFORMATION & COMMUNICATION SYSTEMS SPECIALIST | |
| SIGNALMAN | |
| WEAPONS TECHNICIAN | GUNNER’S MATE |
| AMMUNITION TECHNICIAN | |
| MINE TECHNICIAN | |
| TORPEDO TECHNICIAN | |
| ELECTRICIAN | ELECTRICAL ENGINEER |
| ΕΝGINEERING SYSTEMS TECHNICIAN | INTERNAL COMBUSTION ENGINES ENGINEER |
| REFRIGERATING SYSTEMS ENGINEER | |
| ELECTRONIC SYSTEMS TECHNICIAN | ANTISUBMARINE DEVICES ELECTRONIC TECHNICIAN |
| AUTOMATIC SYSTEMS ELECTRONIC TECHNICIAN | |
| FIRE CONTROL SYSTEMS ELECTRONIC TECHNICIAN | |
| RADIO LOCATION DEVICES ELECTRONIC TECHNICIAN | |
| COMMUNICATION SYSTEMS ELECTRONIC TECHNICIAN | |
| TORPEDOES, SEA MINES AND DEPTH CHARGES ELECTRONIC TECHNICIAN | |
| COMPUTERS AND NETWORKS ELECTRONIC TECHNICIAN
|
COMPUTERS AND NETWORKS ELECTRONIC TECHNICIAN |