French submarine Le Vigilant (S618)

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|Ship country=France

|Ship flag={{shipboxflag|France|naval}}

|Ship name=Le Vigilant

|Ship namesake="Vigilant"

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|Ship original cost=€4.282 billion (2010){{cite web |url=http://www.defense-aerospace.com/article-view/feature/112431/french-auditor-reveals-weapon-prices%2C-a400m-details.html |title=French Audit Report Reveals Weapon Prices, A400M Details |website=defence-aerospace.com |date=18 February 2010 |accessdate=7 August 2015 |archive-date=14 October 2013 |archive-url=https://web.archive.org/web/20131014011729/http://www.defense-aerospace.com/article-view/feature/112431/french-auditor-reveals-weapon-prices,-a400m-details.html |url-status=dead }}

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|Ship laid down=1997

|Ship launched=19 September 2003

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|Ship commissioned=26 November 2004

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|Ship homeport=Île Longue

|Ship identification=S618

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{{Infobox ship characteristics

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|Ship class={{sclass|Triomphant|submarine}}

|Ship displacement=*12 640 tonnes (surfaced)

• 14 335 t (submerged)

|Ship length={{convert|138|m|abbr=on}}

|Ship beam={{convert|12.50|m|abbr=on}}

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|Ship draught={{convert|10.60|m|abbr=on}}

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|Ship propulsion=*Pressurised water K15 nuclear reactor ({{convert|150|MW|abbr=on}}), LEU 7%;https://core.ac.uk/download/pdf/18321557.pdf {{Bare URL PDF|date=March 2022}} turboreductor system; Pump-jet

• 2 SEMT Pielstick diesels-alternators 8PA4V200 SM ({{convert|700|kW|abbr=on}}) auxiliaries.
• {{convert|30,500|kW|abbr=on}}

|Ship speed=over {{convert|25|kn|km/h}}

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|Ship test depth=Over {{convert|400|m|abbr=on}}

|Ship complement=*15 officers

• 96 men

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|Ship sensors=*Sonar DMUX 80

• Sonar DUUX 5
• Sonar DSUV 61B Very Low Frequency
• Racal Decca radar (navigation)
• SCC : SET (Système d'exploitation Tactique) : tactical operational system

|Ship EW=ARUR 13

|Ship armament=*Nuclear: 16 M45 or M51 missiles with six to ten TN 75 150 kt{{Cite web|url=https://www.google.com/hostednews/afp/article/ALeqM5hPNTG39EL3N7-Bv8jvy_xmpoUCpg?docId=CNG.40a5a56e8c66c6963f77af98efdaccc7.11|archive-url=https://archive.today/20130124225412/http://www.google.com/hostednews/afp/article/ALeqM5hPNTG39EL3N7-Bv8jvy_xmpoUCpg?docId=CNG.40a5a56e8c66c6963f77af98efdaccc7.11|url-status=dead|archive-date=January 24, 2013|title=AFP: La marine française met un quatrième sous-marin nucléaire en service|access-date=7 January 2020}}{{cite web|url=http://www.meretmarine.com/article.cfm?id=114121 |title=IA M51 : Chape de plomb sur le nucléaire |date=4 October 2010 |publisher=Mer et Marine |access-date=4 October 2010 |url-status=dead |archive-url=https://web.archive.org/web/20101009014420/http://www.meretmarine.com/article.cfm?id=114121 |archive-date=9 October 2010 }} or TNO 100-300 kt thermonuclear warheads{{cite web|last=Kristensen|first=Hans|title=France|url=http://www.fas.org/programs/ssp/nukes/publications1/Article2012_France.pdf|work=Assuring Destruction Forever: Nuclear Weapon Modernization Around the World|publisher=Women’s International League for Peace and Freedom|accessdate=11 April 2013}}{{cite web|last=Reif|first=Kingston|title=Nuclear weapons: The modernization myth|url=http://www.thebulletin.org/web-edition/features/nuclear-weapons-the-modernization-myth|publisher=Bulletin of the Atomic Scientists|accessdate=11 April 2013|date=8 December 2009}}

• Anti-submarine : 4 × {{convert|533|mm|in|abbr=on|0}} tubes for F17 torpedoes
• Anti-surface : Exocet SM39

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