Turkey Launches ' TCG Muratreis ' 3rd Reis-class AIP submarine

On May 29, 2025, the Turkish Navy marked an important milestone by launching its third Reis-class submarine, the future TCG Muratreis, at the Gölcük Naval Shipyard. The announcement was made by the Turkish Ministry of Defence, coinciding with the 572nd anniversary of the Conquest of Istanbul, giving the event a touch of historical significance.

The TCG Muratreis is the third submarine in a six-boat program that aims to strengthen Turkey’s underwater defense capability with modern, air-independent propulsion (AIP) submarines. The project began with the commissioning of the lead submarine, TCG Pirireis, in August 2024. The second, TCG Hizirreis, is currently undergoing sea trials, and one submarine is expected to be commissioned each year until 2028.

Importance of the Project

The Reis-class submarine project is a vital step for the Turkish Navy, which currently operates 13 diesel-electric attack submarines, including Ay-class, Preveze-class, Gür-class, and now one Reis-class boat. These modern submarines will enhance Turkey’s naval strength in the surrounding seas by providing longer underwater endurance, thanks to their advanced AIP technology.

But the project is about more than just new vessels. It’s also a crucial platform for developing Turkey’s own defense industry. Several Turkish defense companies — including ASELSAN, HAVELSAN, STM, MilSOFT, and TÜBİTAK — are contributing to various onboard systems like navigation, combat management, and countermeasure systems. The experience gained through this project will be invaluable for Turkey’s future National Submarine (MİLDEN) program, which is currently in its design phase and expected to deliver fully indigenous submarines in the 2030s.

Specifications of the Reis-Class Submarines

The Reis-class submarines are based on Germany’s proven Type-214 TN design but built in Turkey under license. They are equipped with an advanced air-independent propulsion system that uses proton-exchange membrane (PEM) fuel cells and high-capacity batteries, allowing them to operate submerged for extended periods without needing to surface for air.

Here’s a look at their main specifications:

• Length: 68.35 meters

• Outer Diameter: 6.3 meters

• Displacement: 1,850 tons

• Crew Capacity: 40 personnel

• AIP System: 2 x 120 kW PEM fuel cells

• Batteries: 2 × 324-unit banks

These submarines can deploy a versatile range of weapons, including:

• Heavyweight torpedoes: MK48 Mod 6AT and DM2A4

• Anti-ship missiles: Sub-Harpoon

• Naval mines

• Indigenous weapons: Akya heavyweight torpedo and Atmaca anti-ship missile

With their increased diving depths and modular weapons and sensors, the Reis-class submarines can perform a wide range of missions — from anti-surface and anti-submarine warfare to intelligence-gathering, reconnaissance, and special operations. They’re designed for operations in both shallow coastal waters and deeper ocean patrols.

Looking Ahead

By 2028, the Turkish Navy is set to have six modern AIP submarines in service, significantly enhancing its strategic position in regional waters. More importantly, this program is laying the foundation for Turkey’s long-term goal of building fully indigenous submarines under the MİLDEN program, securing technological independence in undersea warfare.

The launch of TCG Muratreis is not just the addition of a new warship but a clear sign of Turkey’s growing capabilities in naval shipbuilding and defense technology.