The first two ships (Elli and Limnos), which have lengthened hangars and different armament were built specifically for the Hellenic Navy.

The program was performed at Hellenic Shipyards and the upgraded frigates were the following: Kountouriotis (F-462), Adrias (F-459), Navarinon (F-461), Limnos (F-451), Elli (F-450), and Aegaeon (F-460).

On 2 November 2017 Kanaris ran aground near the islet Atalanti, southwest of Psyttaleia in the Saronic Gulf, on the way back to the Salamis Naval Base.

[2] There were no personnel injuries and no fuel leaks but there was serious hull damage which according to news reports affected the SONAR shell.

After 8 months of absence for repairs the ship was again operational in July 2018 using the SONAR and dome from decommissioned Bouboulina (F-463).