OVERVIEW: The S 336 Muratreis [Guppy IIA Class] is a diesel-electric submarine operated by the Turkish Naval Forces. Commissioned in 1976, the vessel represents a modernized variant of the venerable Guppy II class, reflecting a commitment to maintaining a capable, albeit aging, submarine force.

DETAILS: The Guppy (Greater Underwater Propulsive Power Program) II program emerged in the post-World War II era as a United States Navy initiative to modernize its existing fleet of fleet submarines. The program aimed to significantly enhance underwater performance, a critical capability in the face of emerging Soviet submarine threats. The Guppy IIA subclass, specifically, incorporated improvements such as streamlined hulls, more powerful batteries, and updated sonar systems. These modifications resulted in increased underwater speed, endurance, and detection ranges compared to their wartime predecessors. The transfer of Guppy IIA submarines to allied nations, including Turkey, served as a crucial component of Cold War-era military assistance programs, providing these nations with valuable anti-submarine warfare (ASW) capabilities.

The primary roles of the S 336 Muratreis include anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence gathering. While not equipped for dedicated anti-air warfare (AAW), the submarine's stealth and torpedo armament can pose a threat to surface combatants. The operational deployment of the Muratreis would likely focus on patrol and surveillance missions within the Eastern Mediterranean and Black Sea regions, contributing to Turkey's maritime security objectives. The submarine's diesel-electric propulsion system, while less capable than nuclear powerplants, provides a relatively quiet operating profile, making it a formidable threat in littoral environments.

The S 336 Muratreis is equipped with a suite of sensors designed for underwater detection and navigation. The AN/BQS-4 and AN/BQG-3 sonar systems provide active and passive sonar capabilities, enabling the detection and tracking of enemy submarines and surface vessels. The AN/BQR-2B array further enhances passive listening capabilities, extending the submarine's detection range. Radar warning receivers, specifically the AN/WLR-1 and AN/WLR-3, offer crucial situational awareness, alerting the crew to the presence of enemy radar emissions. The SS 2A likely represents a surface search radar. For close-range targeting and navigation, the submarine is fitted with a generic submarine periscope of optical design. Armament consists of 533mm Mk32/34 torpedo tubes and 533mm Mk33/35 torpedo tubes, providing the capability to launch a variety of torpedoes against submerged and surface targets. A signal ejector supports communication and deception operations.

SPECIFICATION: Length: 95.0 m || Beam: 8.3 m || Draft: 5.2 m || Disp: 1525 t

SENSORS: AN/WLR-1 || AN/WLR-3 || AN/BQS-4 || AN/BQG-3 || SS 2A || AN/BQR-2B || Generic Submarine Periscope, Optical

ARMAMENT: Signal Ejector || 533mm Mk32/34 TT || 533mm Mk33/35 TT || 533mm Mk32/34 TT