Preveze class type 209-1400 and at the back Ay class Type 209-1200?
-The Preveze-Class Submarines Mid-Life Modernisation Project (PMMP) includes the upgrade of four Preveze-class submarines, TCG Preveze (S-353), TCG Sakarya (S-354), TCG 18 Mart (S-355) and TCG Anafartalar (S-356).
-MÜREN combat management system.
- inertial navigation system, salinity-depth-density measurement system, floating antenna, satellite communication mast, assault and navigation periscope system
-cover cooled water system, emergency underwater communication system, static converter and air freshening system.
- Hensoldt modernised vision equipment used by the Preveze-class submarines.
Gür class and Ay-class submarine modernization
-platform integration of the Advent-Müren Combat Management System aboard Gür-Class Submarines. TÜBİTAK Bilgem and Naval Forces Command signed a protocol on 5 December 2022 for the Advent-Müren Combat Management System and AKYA Integration project for Gür-Class
-Preveze- and Ay-class submarines that have been equipped with the MÜREN Combat Management System have now been provided with the national torpedo AKYA firing capability.