The MILDEN project (Turkish: Milli Denizaltı Projesi; English: National Submarine Project) is a multi-year military design and procurement project to develop indigenous air-independent power attack submarines, intended to be commissioned into the Turkish Navy in the 2030s. MILDEN is being designed in the Gölcük Naval Shipyard, where concept design was completed in 2022, and the "preliminary design phase, in which the main and auxiliary systems [will be] elaborated in detail" began in September 2022.
, Turkey planned to start construction of the first submarine in 2025. MILDEN is a diesel-electric submarine of approximately 2,700 tonnes displacement, and somewhat over in length.[1]