On May 29, 2025, the Turkish Ministry of Defence announced that the third submarine of the Reis-class project, the future TCG Muratreis, was launched at Gölcük Naval Shipyard.
The Turkish Ministry of Defence announced the launch of the third Reis-class submarine on social media, sharing photos of the vessel as it touched the water at Gölcük Naval Shipyard.
“MURATREİS, the third of the six Reis-class submarines under construction at our Directorate of Shipyards’ Gölcük Shipyard Command, was launched on the 572nd anniversary of the Conquest of Istanbul.”
Turkish MoD X account
Muratreis, the second submarine of the project, was dry-docked on 07 June 2024. The lead boat of the project, the TCG Pirireis was commissioned in August 2024, and the second boat, TCG Hizirreis is currently at sea trials. From this year onward, one submarine will be commissioned every year, and 6 Reis-class submarines will be delivered to the Turkish Navy by 2028.
The contract signed in July 2009 between the Presidency of the Turkish Defense Industries (SSB) and Thyssen Krupp Marine Systems is to build 6 submarines with an air-independent propulsion (AIP) system and place them in the service of the Turkish Naval Forces.
Importance of the project
The Reis-class submarine project is crucial for the Turkish Navy. These submarines will enhance the submarine fleet’s strength in surrounding seas by featuring AIP capability. The Turkish Navy has a 13-piece submarine fleet consisting of four Ay-class (Type 209/1200), four Preveze-class (Type 209T/1400), four Gür-class (Type 209T2/1400), and one Reis-class (Type-214TN), all conventionally-powered (diesel-electric) attack submarines. By 2028, Türkiye will be operating six Reis-class AIP submarines.
The Reis-class will benefit not only the Turkish Navy but also Turkey’s defense technological and industrial base. The know-how and experience gained from the project will be a strong reference for indigenous submarines intended to be built under the National Submarine (MİLDEN) project, which is currently at the design phase and expected to be built in the 2030s. There are many Turkish sub-contractors, including ASELSAN, HAVELSAN, MilSOFT, Defense Technologies Engineering and Trade Inc. (STM), Koç Information and Defense, Scientific and Technological Research Council of Turkey (TÜBİTAK), and AYESAŞ working on Reis-class submarines’ sub-systems such as navigation and data management system, data link, torpedo countermeasure system, etc.
About Reis-class submarines
The Reis-class submarines feature a single-hull, one-compartment design and an air-independent propulsion system on the proven Howaldswerke-Deutsche Werft (HDW) fuel cell. The submarines have a length of 68.35 meters, an outer diameter of 6.3 meters, a displacement of 1,850 tons, and a capacity of 40 personnel.
ThyssenKrupp Marine Systems have been building the Reis-class submarines (known initially as Type 214 TN) in Turkey’s Golcuk Shipyard. The AIP system uses fuel cell technology, PEM Fuel Cell (2x120kw), and high-capacity batteries (2×324 units). This provides the submarine with the ability to conduct long-endurance deployments without snorkeling.
The boats will deploy heavyweight torpedoes (MK48 Mod 6AT and DM2A4), anti-ship missiles (Sub-Harpoon), and mines. Indigenous heavyweight torpedo Akya and anti-ship missile Atmaca are announced to be fitted to the submarines of the project. The submarine will be able to undertake missions such as littoral water operations to ocean-going patrols, including anti-surface and anti-submarine operations, ISR tasks, and special forces operations. This is mainly thanks to their increased diving depths and their modular weapon and sensor mix.
