French submarine L'Indomptable
 L'Indomptable's sister ship Le Redoutable in 2005 | |
| History | |
|---|---|
 France | |
| Name | L'Indomptable |
| Builder | Cherbourg Naval Base |
| Laid down | 4 December 1971 |
| Launched | 17 August 1974 |
| Commissioned | 23 December 1976 |
| Decommissioned | April 2005 |
| Fate | Scrapped, 2020 |
| General characteristics | |
| Class & type | Redoutable-class ballistic missile submarine |
| Displacement |
|
| Length | 128.0 m (419 ft 11 in) |
| Beam | 10.6 m (34 ft 9 in) |
| Draft | 10.0 m (32 ft 10 in) |
| Installed power | 15,000 shp (11,000 kW) |
| Propulsion |
|
| Speed |
|
| Range | Unlimited |
| Complement | 135 |
| Armament |
|
L'Indomptable (S613) was a Redoutable-class ballistic missile submarine operated by the French Navy between 1976 and 1997. One of the first of her kind with the Navy, the boat conducted deterrence patrols as part of the French nuclear triad during the Cold War. Her duties were ultimately replaced by the Triomphant-class submarine Le Vigilant, and the old boat was dismantled in 2020.
Development and design
During his premiership in the 1960s, Charles de Gaulle emphasized French autonomy from NATO and the Western Bloc, with a comprehensive military to maintain French sovereignty. A significant element of the doctrine was the development of a nuclear triad outside of American control, which became known as the Force de dissuasion. The seaborn leg of the triad required the domestic development of ballistic missile submarines, which became the main priority of the French Navy (Marine Nationale) for the next decade.[1] The first series of French ballistic missile submarines were known as the Redoutable class.[2]
The six Redoutable-class ballistic missile submarines measured 128.0 metres (419 ft 11 in) long overall, with a beam of 10.6 metres (34 ft 9 in) and a draught of 10.0 metres (32 ft 10 in). The boats displaced 7,500 tons surfaced and 9,000 tons submerged and carried a complement of 135. Propulsion was provided by a single-shaft nuclear power plant consisting of one pressurized water-cooled reactor, two steam turbines, two turbo-alternators, and one electric motor. This machinery produced 15,000 shaft horsepower (11,000 kW) and enabled a maximum speed of 20 knots (37 km/h; 23 mph) surfaced and 25 knots (46 km/h; 29 mph) submerged. Unlike earlier boats in the class, L'Indomptable was fitted with a metallic reactor core instead of an oxide core. An auxillary diesel engine was carried onboard to get the submarines home if the reactor failed; the engine had a range of 5,000 kilometres (3,100 mi; 2,700 nmi) and an output of 2,670 brake horsepower (1,990 kW). Armament consisted of sixteen submarine-launched ballistic missile tubes and four bow-mounted 550 mm (22 in) torpedo tubes with 18 torpedoes carried onboard. Sensors fitted included the DUVU-23 and DUUX-2 sonar systems, and the submarines could have a maximum depth of 300 metres (980 ft).[2]
Service history
L'Indomptable was the fourth of the class, and she was laid down at the Cherbourg Naval Base on 4 December 1971, launched on 17 September 1977, and commissioned on 23 December 1976. She joined other members of the class and operated out of Île Longue in Brittany on patrols that lasted between two and three months. Two crews operated the boat in alternating patrols. The submarine was first deployed with the M20 ballistic missile, which was later replaced by the M4.[2]
In the late 1990s, the Triomphant class was introduced to replace the Redoutable class on a one-to-one basis, although the last two Triomphant-class boats were cancelled.[3] L'Indomptable was decommissioned in April 2005 as her replacement, Le Vigilant, entered service in 2004.[4][5] The old submarine was laid up at Cherbourg[6] and was dismantled between March 2020 and August 2021.[7]
References
- ↑ Robert Gardiner (1983). Conway's All the World's Fighting Ships, 1947-1982. Conway Maritime Press. pp. 21–22. ISBN 978-0-85177-225-7.
- 1 2 3 Robert Gardiner (1983). Conway's All the World's Fighting Ships, 1947-1982. Conway Maritime Press. p. 45. ISBN 978-0-85177-225-7.
- ↑ Hutchinson, Robert (2001). Jane's Submarines: War Beneath the Waves from 1776 to the Present Day. Harper-Collins. p. 180. ISBN 978-0-00-765333-1.
- ↑ Norris, Robert S.; Kristensen, Hans M. (2005-07-01). "French Nuclear Forces, 2005". Bulletin of the Atomic Scientists. 61 (4): 73–75. doi:10.2968/061004019. ISSN 0096-3402.
- ↑ "Le Redoutable Ballistic Missile Submarine SSBN French Navy". www.seaforces.org. Retrieved 2026-05-31.
- ↑ Guillermard, Véronique (2016-10-28). "Les premiers sous-marins nucléaires démantelés". Le Figaro (in French). Retrieved 2026-05-31.
- ↑ "Naval Group starts the deconstruction of a third French nuclear-powered ballistic missile submarine in Cherbourg". Naval Group. 2025-11-14. Retrieved 2026-05-31.
External links
- Dismantling The Indomptable: Inside the Secrets of a Nuclear Submarine - A documentary about the dismantling of L'Indomptable