OVERVIEW: The S 31 Salta [Type 209-1100] is a conventionally powered submarine operated by the Argentine Navy. Commissioned in 1974, it represents a variant of the widely exported German Type 209 diesel-electric submarine design. The S 31 is a dedicated attack submarine optimized for anti-submarine warfare and anti-surface warfare roles within the Argentine littoral environment.

DETAILS: The Type 209 design, developed by Howaldtswerke-Deutsche Werft (HDW) in Germany, was conceived as a cost-effective and readily exportable submarine platform suited for the operational needs of smaller navies. The Type 209-1100 variant, as represented by the S 31 Salta, features a slightly smaller displacement than later versions of the class. The design philosophy emphasized reliability, ease of maintenance, and effective performance in coastal waters. The Type 209’s modular construction facilitated efficient construction and maintenance, contributing to its global popularity. Argentina acquired two Type 209-1100 submarines, the Salta and her sister ship, as part of a modernization program for its submarine force.

The primary role of the S 31 Salta is anti-submarine warfare (ASW), with a secondary focus on anti-surface warfare (ASuW) and intelligence gathering. The vessel is capable of conducting independent patrol missions, providing forward reconnaissance for surface task groups, and executing covert mine-laying operations. Its relatively shallow draft compared to larger submarines makes it well-suited for operations in the South Atlantic's coastal regions. The submarine's capabilities are enhanced by its suite of sensors, which provides the crew with the means to detect, classify, and engage enemy targets.

The S 31 Salta’s operational effectiveness is primarily derived from its sensor suite and torpedo armament. The installation of the DUUX 2C passive ranging sonar, combined with the CSU 3-2 active sonar, provides a comprehensive underwater acoustic picture, enabling the submarine to detect and track surface ships and other submarines. The AN 407 and IPS CSU 3 systems likely contribute to improved sonar processing and target classification. The Generic Surface Search Radar allows for surface contact detection and navigation. The Generic Submarine Periscope, equipped with optical capabilities, provides visual confirmation of targets and situational awareness. The 533mm torpedo tubes, capable of launching a variety of torpedo types, including anti-submarine and anti-surface weapons, constitute the submarine’s primary offensive armament. The Signal Ejector is used for communication and decoy deployment. The Generic ESM system provides electronic intelligence gathering and early warning of radar threats.

SPECIFICATION: Length: 54.1 m || Beam: 6.2 m || Draft: 5.9 m || Disp: 1100 t

SENSORS: Generic ESM [Average] || Generic Surface Search Radar || DUUX 2C || CSU 3-2 || AN 407 || IPS CSU 3 || Generic Submarine Periscope, Optical

ARMAMENT: Signal Ejector || 533mm TT || 533mm TT