Second Suffren-class nuclear submarine delivered to French Navy
Duguay-Trouin SSN is expected to begin pre-commissioning trials soon. (Photo: DGA)
The second Suffren-class SSN for the French Navy, Duguay-Trouin, has been officially delivered after months of sea trials.
The announcement of the late July delivery was made by the Ministry of Armed Forces on 10 August and the process of further sea trials, evaluation and a lengthy deployment will now begin before the eventual commissioning of the boat.
The sea trials before handover began in March and included evaluation of the nuclear propulsion system and performance at a range of speeds and depths.
Specifically the tests included a static dive, or immersion without propelled movement, to check the stability of the submarine; surface and diving tests; safety and operation of the installations, including its nuclear boiler room; and diving tests to verify the operation of its combat system, including its ability to implement its weapons and communicate.
Related Articles
France’s first Barracuda-class submarine enters service
These tests were led by the DGA in conjunction with the French Alternative Energies and Atomic Energy Commission and in close partnership with the French Navy and Naval Group and TechnicAtome.
The service’s first of class, Suffren, was commissioned into service in June 2022, 18 months after it was handed over to the French Navy for testing.
The Suffren-class submarines will replace the existing Rubis- and Amethyste-class and provide France with an enhanced sub-surface attack capability.
Duguay-Trouin was laid down on 26 June 2009 and had been due to be delivered in 2022, while the next boat Tourville was laid down on 28 June 2011. The first four are all at different stages of construction and are planned to be delivered by 2025.
All six SSNs are planned to be handed over by 2030. Tourville was rolled out on 20 July 2023 and is expected to start sea trials in 2024.
Related Programmes in Defence Insight
Related Equipment in Defence Insight
More from Naval Warfare
-
![US Navy’s $275 billion BBGN plan hinges on shipyard transformation]()
US Navy’s $275 billion BBGN plan hinges on shipyard transformation
The US Navy’s planned nuclear-powered warship carries a US$275 billion price tag, but the greater story lies in the industrial overhaul needed to build it, from AI-enabled design to digital twins and modular construction.
-
![Asia-Pacific emerges as the largest export market for US-made USVs]()
Asia-Pacific emerges as the largest export market for US-made USVs
Asian customers have placed one of the largest known international purchases of US-built uncrewed surface vessels, highlighting accelerating regional demand for autonomous maritime capabilities and distributed naval operations.
-
![Europe’s naval contractors benefit from growing refit and upgrade demand]()
Europe’s naval contractors benefit from growing refit and upgrade demand
Rheinmetall’s order to modernise the German Navy frigate Bayern points to a wider European shift towards extending warship service life as new-build programmes face delay.
-
![The UK joins the movement towards joint procurement]()
The UK joins the movement towards joint procurement
The UK will spend an estimated US$3.89 billion over the next decade in joint naval programmes, a lot of which will be in cooperation with Norway.
