OVERVIEW: The S 135 Hashmat [Agosta 70] is a diesel-electric attack submarine operated by the Pakistan Navy, commissioned in 1979. It represents a significant enhancement of Pakistan's underwater warfare capabilities.

DETAILS: The Agosta 70 class was designed by the French shipbuilder DCNS (now Naval Group) as an export-oriented submarine intended to provide a balance of performance, affordability, and ease of maintenance. The design emphasizes acoustic discretion, making it a relatively quiet submarine compared to earlier generations. The Agosta 70 submarines were intended to address the requirements of navies seeking a modern and capable submarine force without the financial burden associated with nuclear-powered designs. Pakistan's acquisition of these submarines underscored its commitment to maintaining a credible naval presence in the Arabian Sea and Indian Ocean. The Hashmat, specifically, was one of the earlier units of the class delivered to Pakistan, serving as a key component of its submarine fleet for several decades.

The primary roles of the S 135 Hashmat are anti-submarine warfare (ASW), anti-surface warfare (ASuW), and maritime interdiction. Its 533mm torpedo tubes provide a potent offensive capability against both surface combatants and enemy submarines. While not specifically designed for anti-air warfare (AAW), its inherent stealth characteristics allow it to operate effectively in contested environments. The submarine can also be deployed for intelligence gathering and surveillance missions, providing valuable information on enemy movements and activities. The Signal Ejector allows for the covert deployment of communication buoys or other specialized payloads.

The S 135 Hashmat’s sensor suite provides a comprehensive picture of its surrounding environment. The TRS 3100 Calypso III (DRUA 33C) radar allows for surface detection and navigation. The DUUX 2B and DUUA 2B sonar systems likely provide active and passive sonar capabilities, respectively, for target detection and tracking. The DUUA 1A is a passive ranging sonar. The DR 2000U radar intercept receiver provides electronic support measures (ESM), allowing the submarine to detect and classify enemy radar emissions. The DSUV 2H is a towed sonar array. The DUUG 5 and DUUG 6 (M5) are fire control systems for the torpedoes. The submarine periscope provides visual situational awareness and target identification.

SPECIFICATION: Length: 67.6 m || Beam: 6.8 m || Draft: 5.4 m || Disp: 1490 t

SENSORS: TRS 3100 Calypso III [DRUA 33C] || DUUX 2B || DUUA 2B || DUUA 1A || DR 2000U || DSUV 2H || DUUG 5 || DUUG 6 [M5] || Generic Submarine Periscope, Optical

ARMAMENT: Signal Ejector || 533mm TT