Between December 20-22, 2021, Koç Bilgi ve Savunma Teknolojileri A.Ş. (KoçSavunma), which develops indigenous electronic systems for naval platforms, especially solutions related to underwater acoustics with an R&D-based approach, carried out the Factory Acceptance Tests (FAT) of the Submarine Emergency Underwater Telephone (EUT) System under the PREVEZE Class Submarine Mid-Life Upgrade (MLU) Project! The Submarine Emergency Underwater Telephone System is expected to be delivered in the coming days for integration into the TCG Sakarya Submarine (S-354), the first submarine to be modernized under the PREVEZE Class Submarine MLU Project.