OVERVIEW: The S 611 *Le Redoutable* is a ballistic missile submarine (SSBN) of the *Le Redoutable* class, operated by the French Navy.

DETAILS: The *Le Redoutable* class represented France's initial foray into independent nuclear deterrence at sea. Design efforts commenced in the early 1960s, driven by President Charles de Gaulle's vision of a force de frappe. The program aimed to create a credible second-strike capability to ensure French national security. The design prioritized stealth and operational endurance, incorporating advanced (for the time) acoustic dampening measures. Construction was a significant undertaking for French industry, requiring the development of specialized materials and manufacturing techniques. *Le Redoutable* herself, commissioned in 1971, was the lead ship of the class and underwent modernisation refits throughout her operational life. The class, while revolutionary for France, was gradually superseded by the *Le Triomphant* class of SSBNs, featuring improved stealth characteristics and more modern missile systems.

The primary role of *Le Redoutable* was to provide a secure and survivable platform for launching nuclear ballistic missiles, guaranteeing a retaliatory strike in the event of a nuclear attack against France. While primarily designed for strategic deterrence, the submarine also possessed a secondary anti-surface warfare (ASuW) capability via its torpedo tubes. However, its focus remained on maintaining a credible nuclear deterrent posture, primarily operating in the Atlantic Ocean and other strategic waters. The design did not incorporate any significant anti-submarine warfare (ASW) or anti-air warfare (AAW) capabilities. Operational deployments involved extended patrols lasting several months, maintaining continuous readiness to respond to any potential threat.

Technologically, *Le Redoutable* incorporated a comprehensive suite of sensors to ensure situational awareness and navigational accuracy. The DUUX 2A sonar served as the primary active and passive sonar system, providing detection and tracking of underwater contacts. The DSUV 61A and DSUV 23 sonars likely served in a supplementary role, perhaps providing increased bandwidth analysis or specific frequency coverage. The ARUR 10 [DR 2000U] served as a radar intercept system, alerting the submarine to the presence of surface vessels and aircraft emitting radar signals. Navigation was supported by the DUUG 1B inertial navigation system and the DRUA 33C Calypso III [TRS 3100] radar, aiding in surface navigation and target acquisition. The optical and low-light television (LLTV) periscopes provided visual confirmation of targets and assisted in covert operations. The M20/TN60 ballistic missiles carried a single TN60 warhead. The 550mm torpedo tubes provided a limited anti-surface capability, while the Signal Ejector allowed for the deployment of countermeasures and communication buoys.

SPECIFICATION: Length: 128.0 m || Beam: 10.6 m || Draft: 10.0 m || Disp: 6500 t

SENSORS: DUUX 2A || DSUV 61A || DSUV 23 || ARUR 10 [DR 2000U] || DUUG 1B || DRUA 33C Calypso III [TRS 3100] || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: M20/TN60 || 550mm TT || Signal Ejector