OVERVIEW: The S 71 Galerna [Agosta, S-70] is a diesel-electric attack submarine (SSK) operated by the Spanish Navy. A member of the Agosta-class family (designated S-70 class within Spain), it represents a crucial component of Spain's underwater defense capabilities. It was commissioned in 2006, following a significant modernization program.

DETAILS: The Agosta-class submarines, originally designed by the French shipyard DCN (now Naval Group), were conceived as relatively compact and quiet platforms suitable for operations in littoral waters and challenging acoustic environments. The initial Agosta design dates back to the 1970s, but the Galerna specifically underwent a substantial modernization effort, extending its operational lifespan and significantly enhancing its combat effectiveness. This modernization program focused on upgrading the submarine's sensor suite, combat management system, and overall stealth characteristics. The intent was to provide the Spanish Navy with a modern and capable submarine force while minimizing the cost associated with acquiring completely new vessels. Spain operates a small submarine fleet, and the Galerna-class represents a critical asset for maintaining its naval presence and protecting its maritime interests.

The primary roles of the S 71 Galerna are anti-submarine warfare (ASW), anti-surface warfare (ASuW), and intelligence, surveillance, and reconnaissance (ISR). In the ASW role, the submarine uses its advanced sonar systems to detect, track, and engage hostile submarines. The combination of active and passive sonar arrays, including the DUUA 2B, DUUA 1A, TSM 2263, and TSM 2255, provides a comprehensive underwater acoustic picture, enabling the Galerna to effectively locate and classify targets at considerable distances. In the ASuW role, the Galerna can employ its 533mm torpedo tubes to engage surface combatants. The submarine also possesses a signal ejector, primarily used for communication purposes and the deployment of countermeasures. The integration of the Manta E towed array enhances the submarine's passive detection range, particularly in noisy littoral environments.

The S 71 Galerna's sensor suite is particularly noteworthy. The TRS 3100 Calypso III radar (also known as DRUA 33C) provides surface search and navigation capabilities. The TSM 2263 sonar suite, incorporating the DSUV 2H and DUUA 2D components, offers advanced target classification and tracking functionalities. The Solarsub system likely refers to an integrated navigation and command system. The inclusion of both a generic submarine periscope (optical) and a low-light television (LLTV) periscope allows for effective visual observation and target identification under varying light conditions. The DUUG 5 and DUUG 6 [M5] are likely integrated within the broader sonar processing and display system, providing enhanced situational awareness to the crew. These sensors, coupled with the upgraded combat management system, make the Galerna a formidable underwater asset.

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

SENSORS: TRS 3100 Calypso III [DRUA 33C] || DUUA 2B || DUUA 1A || TSM 2263 [DSUV 2H + DUUA 2D] || TSM 2255 || Manta E || DUUG 5 || DUUG 6 [M5] || Solarsub || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: 533mm TT || Signal Ejector