The Turkish Navy started to upgrade the Gabya class frigates with a new electro-optic sensor.
The sensor was first observed on board TCG Gökçeada a couple months ago, the new electro-optic sensor appeared on board TCG Gaziantep this week. The ship was in overhaul. The E/O seems to be installed on a special pedestal on top of the bridge.
While there are no official announcements either from the Turkish Navy or Aselsan the system used on board seems to be the Denizgözü-Ahtapot version.
According to Aselsan Ahtapot is an E/O reconnaissance and surveillance system. The system has high-performance IR, HDTV and Spotter cameras, and an eye-safe laser range finder.
The sensor was specifically designed for naval use on board large ships. The first ship it was installed was on TCG Burgazada.
The lack of a dedicated E/O reconnaissance and surveillance system on board Gabya class frigates was an important shortcoming. With the installation of Ahtapot E/O, this shortcoming will be rectfied.