**OVERVIEW:** The S 620 *Agosta* is a diesel-electric attack submarine (SSK) of the *Agosta* class, operated by the French Navy.

**DETAILS:** The *Agosta* class was developed in the 1970s by Direction des Constructions et Armes Navales (DCAN), now Naval Group, as a follow-on to the earlier *Daphné* class. The design emphasized improved acoustic stealth, enhanced sensor capabilities, and a modernized combat system to address the evolving threats in the underwater domain. The *Agosta* class incorporates a teardrop hull form optimized for hydrodynamic efficiency and reduced flow noise, contributing to its low acoustic signature. Internal arrangements were meticulously planned to minimize noise transmission, furthering the submarine's stealth capabilities. The class was intended to provide a cost-effective yet potent submarine platform for both export and domestic service. The *Agosta* design proved successful, leading to export sales to Spain and Pakistan. The French Navy operated four *Agosta* class submarines, later superseded by the *Rubis* and *Suffren* class nuclear-powered submarines.

The primary roles of the *Agosta* class submarine are anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence gathering. The *Agosta*’s ASW capability is centered on its suite of advanced sonars, enabling long-range detection and tracking of enemy submarines. The DSUV 62A [TSM 2933] towed array sonar significantly extends the detection range, providing a strategic advantage in ASW operations. Its ASuW capability relies on its 550mm torpedoes and associated fire control system, capable of engaging surface combatants at considerable ranges. The DRUA 33C Calypso III [TRS 3100] radar provides surface search capabilities, enabling the *Agosta* to navigate and identify potential targets. The ARUR 10 [DR 2000U] electronic support measures (ESM) system facilitates intelligence gathering by detecting and analyzing enemy radar emissions.

The S 620 *Agosta* is equipped with an integrated sensor suite designed for comprehensive situational awareness. The DUUX 2A bow sonar provides active and passive detection capabilities, while the DSUV 22 [DSUV 2H + DUUA 2D] hull-mounted sonar complements the towed array, providing a broader coverage. The submarine's navigation is aided by the DUUG 5 and DUUG 6 [M5] navigation systems. The Generic Submarine Periscope, Optical and Generic Submarine Periscope, LLTV (Low Light Television) provide visual reconnaissance capabilities in both daylight and low-light conditions. The 550mm torpedo tubes provide a potent offensive capability against both surface and subsurface targets. The Signal Ejector permits the launch of communications buoys and decoys. The submarine’s combat system integrates sensor data to provide a comprehensive tactical picture, enabling effective target engagement.

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

**SENSORS:** DUUX 2A || DSUV 62A [TSM 2933] || DSUV 22 [DSUV 2H + DUUA 2D] || ARUR 10 [DR 2000U] || DRUA 33C Calypso III [TRS 3100] || DUUG 5 || DUUG 6 [M5] || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

**ARMAMENT:** 550mm TT || Signal Ejector