OVERVIEW: The S 616 *Le Triomphant* is a *Le Triomphant*-class nuclear-powered ballistic missile submarine (SSBN) of the French Navy (Marine Nationale). Entered service in 2018, it represents the cutting edge of France’s sea-based nuclear deterrent.

DETAILS: The *Le Triomphant* class was conceived as a replacement for the aging *Redoutable*-class SSBNs, with design work commencing in the late 1980s. The program aimed to provide France with a more modern, stealthy, and capable platform for its *Force de Frappe*. Key design considerations included enhanced acoustic signature reduction, improved sensor performance, and the ability to carry the next generation of submarine-launched ballistic missiles (SLBMs). Construction of *Le Triomphant* herself began in the early 2010s, incorporating lessons learned from the earlier boats of the class. The *Le Triomphant* design emphasizes quiet operation to minimize the risk of detection by enemy anti-submarine warfare (ASW) assets. Significant investments were made in noise reduction technologies, including raft-mounted machinery, advanced hull coatings, and a streamlined hull form.

The primary role of *Le Triomphant* is to provide a secure and survivable platform for France's nuclear deterrent, ensuring a credible second-strike capability. This is achieved through the deployment of the M51 SLBM, which can deliver multiple independently targetable reentry vehicles (MIRVs) with intercontinental range. Beyond its strategic nuclear role, *Le Triomphant* also contributes to maritime surveillance and intelligence gathering. While primarily an SSBN, the vessel retains a limited anti-submarine warfare (ASW) and anti-surface warfare (ASuW) capability through its torpedo armament, offering a degree of self-defense should the situation arise. The CONTRALTO-S system provides a torpedo countermeasures capability.

Technologically, *Le Triomphant* is equipped with a comprehensive suite of sensors designed for situational awareness and target detection. The DMUX 80 bow and flank arrays provide long-range passive sonar detection capabilities, supplemented by the DRUA 33C Calypso III (TRS 3100) active sonar for precise target localization and tracking. The ARUR 13 (DR 3000U) electronic support measures (ESM) suite allows for the detection and identification of radar and communication signals from surface ships and aircraft. The DSUV 61B towed array sonar provides enhanced low-frequency detection capabilities, particularly in noisy environments. The DUUG 6 (M5) integrated sonar suite processes data from multiple sensors to create a comprehensive underwater picture. Optical and LLTV periscopes provide visual and low-light surveillance. In terms of offensive capabilities, the 533mm torpedo tubes allow for the launch of anti-submarine and anti-surface torpedoes, while the Signal Ejector likely provides a method for deploying countermeasures or communication buoys.

SPECIFICATION: Length: 138.0 m || Beam: 12.5 m || Draft: 10.6 m || Disp: 12640 t

SENSORS: DMUX 80 Bow || DMUX 80 Flank || DRUA 33C Calypso III [TRS 3100] || ARUR 13 [DR 3000U] || DSUV 61B || DUUG 6 [M5] || Generic Submarine Periscope, Optical || Generic Submarine Periscope, LLTV

ARMAMENT: CONTRALTO-S [SLAT] || M51/TN75 || Signal Ejector || 533mm TT