Munitions

L3 or L5 type torpedo

Also known as
  • L3 torpedo
  • L5 torpedo
  • L3 or L5 torpedo
  • DTCN L3 torpedo
  • DTCN L5 torpedo
  • ECAN L5 torpedo
  • L5 Mod 1
  • L5 Mod 3
  • L5 Mod 4
  • L5 Mod 4 anti-submarine torpedo

The L3 or L5 type torpedo is a French DTCN-built anti-submarine torpedo family for Cold War naval platforms. Specialist references separate the 550 mm L3 from the later 533 mm L5 series, while French and naval references document fixed-catapult L3/L5 carriage on surface ships including A69 avisos and Cassard-class frigates.

L3 or L5 type torpedo, Fixed-catapult-launched torpedo, Munitions
Image source: Wikimedia Commons: Lancement torpille L3 3.jpg
Profile / Specs

Profile

Origin
France
Built by
DTCN
Type
Fixed-catapult-launched torpedo
Service note
Cold War

Specifications

Caliber
550 mm (L3); 533 mm (L5)
Weight
910 kg (L3); 935 kg (L5)
Speed
25 knots (L3); 35 knots (L5)
Range
5,000 m (L3); 7,000 m (L5 Mod 1/3); 9,500 m (L5 Mod 4)
Warhead
200 kg
Guidance
Acoustic homing anti-submarine torpedo family
Propulsion
Nickel-cadmium battery (L3); silver-zinc battery (L5)
Carrier Platforms

The family was carried on French surface ships with fixed catapult launchers.

CarrierCarrier typeCarriage evidence
D'Estienne d'Orves-class / A69 type aviso, Aviso / light corvette class, Naval SystemsD'Estienne d'Orves-class / A69 type avisoAviso / light corvette class

Public class references list four fixed catapults for L3 or L5 type torpedoes in the D'Estienne d'Orves-class / A69 type aviso armament fit.

Sources: Seaforces: D'Estienne d'Orves-class aviso

Carrier And Launch Context

The record groups the earlier 550 mm L3 and the later 533 mm L5 family. Public sources document fixed catapults on French surface ships and separate L5 models by launch platform.

Carrier, fit, or modelDocumented torpedo connectionSource-backed note
L3550 mm acoustic-homing ASW torpedoNavWeaps lists the L3 as entering service in 1960, weighing about 910 kg, and using a nickel-cadmium battery.
L5 Mod 1Surface-ship L5 modelNavWeaps lists L5 Mod 1 as a 1971 surface-ship model in the L5 family.
L5 Mod 3Surface-ship and submarine L5 modelNavWeaps lists L5 Mod 3 as a 1971 L5 model usable from surface ships and submarines.
L5 Mod 4Surface-ship ASW torpedoNavWeaps lists L5 Mod 4 as entering service in 1980; ECPAD documents Cassard carrying L5 Mod 4 anti-submarine torpedoes with fixed catapults.
D'Estienne d'Orves-class / A69 type aviso, Aviso / light corvette class, Naval SystemsA69 type avisoFour fixed catapults for L3 or L5Seaforces lists the D'Estienne d'Orves-class / A69 type aviso with four fixed catapults for L3 or L5 type torpedoes in the original armament fit.
Cassard-class frigateKD 59E fixed launchers for ECAN L5 Mod 4GlobalSecurity lists Cassard-class armament with two fixed KD 59E torpedo launchers for ECAN L5 Mod 4 torpedoes, while ECPAD documents Cassard carrying two fixed catapults and ten L5 Mod 4 ASW torpedoes during a 2010 exercise.

Sources: Seaforces: D'Estienne d'Orves-class aviso; GlobalSecurity: Cassard class; ECPAD ImagesDefense: Tir d'une torpille anti-sous-marine; NavWeaps: French Torpedoes.

Timeline

L3 or L5 type torpedo Key Events

  1. L3 enters service

    NavWeaps lists the L3 acoustic-homing anti-submarine torpedo as entering service in 1960.

    Sources: NavWeaps: French Torpedoes

  2. L5 Mod 1 and Mod 3 enter service

    NavWeaps lists the L5 Mod 1 and Mod 3 variants as 1971 service entries, with Mod 1 for surface ships and Mod 3 for both surface ships and submarines.

    Sources: NavWeaps: French Torpedoes

  3. L5 Mod 4 enters service

    NavWeaps lists the L5 Mod 4 as a 1980 surface-ship variant with longer listed range than the earlier L5 models.

    Sources: NavWeaps: French Torpedoes

  4. Cassard exercise launch documented

    ECPAD documented an L5 launch from the starboard side of the French air-defense frigate Cassard during the Tamoure exercise off Ile du Levant.

    Sources: ECPAD ImagesDefense: Tir d'une torpille anti-sous-marine

Media

L3 or L5 type torpedo Images

L3 or L5 type torpedo, Fixed-catapult-launched torpedo, Munitions - view 1
Source: Wikimedia Commons: L5 Mod 4 torpido.JPG
Related Weapon Systems
D'Estienne d'Orves-class aviso, Aviso / light corvette, Naval SystemsNaval SystemsD'Estienne d'Orves-class avisoAviso / light corvetteThe D'Estienne d'Orves-class aviso, also known as the Type A69, is a French-built light corvette and offshore-patrol family developed for coastal anti-submarine warfare, escort, and overseas-presence missions. Arsenal de Lorient built the French class around an 80-meter diesel hull with Exocet missiles, a 100 mm CADAM gun, torpedoes, and a 375 mm anti-submarine rocket launcher; later French service shifted surviving ships into high-seas patrol duties after heavy anti-submarine and anti-ship weapons were removed.
D'Estienne d'Orves-class / A69 type aviso, Aviso / light corvette class, Naval SystemsNaval SystemsD'Estienne d'Orves-class / A69 type avisoAviso / light corvette classThe D'Estienne d'Orves-class / A69 type aviso is a French-built light corvette and patrol-vessel family developed for coastal anti-submarine warfare, escort, and overseas-presence missions. Arsenal de Lorient built the original French ships around an 80-meter diesel hull with Exocet missiles, a 100 mm CADAM gun, torpedoes, and a 375 mm anti-submarine rocket launcher; later service included French counter-piracy and embargo patrols plus Argentine Drummond-class combat use in the Falklands War.
Neustrashimy-class frigate, Anti-submarine warfare frigate, Naval SystemsNaval SystemsNeustrashimy-class frigateAnti-submarine warfare frigateThe Neustrashimy-class frigate is the Soviet Project 11540 Yastreb anti-submarine warfare frigate family, designed through a long Cold War development path and built at Yantar Shipbuilding Plant in Kaliningrad for Russian Baltic Fleet service. Only Neustrashimy and Yaroslav Mudry were completed, but the class combines a 129.8 m hull, helicopter facilities, sonar-centered anti-submarine weapons, 3K95 Kinzhal naval surface-to-air missiles, Kortik close-in defenses, and Kh-35 Uran anti-ship missiles on the second ship. Neustrashimy is directly documented in the 2008 Gulf of Aden counter-piracy campaign.
MK 54 lightweight torpedo, Lightweight anti-submarine torpedo, MunitionsMunitionsMK 54 lightweight torpedoLightweight anti-submarine torpedoThe MK 54 lightweight torpedo is a U.S. Navy anti-submarine torpedo carried by surface ships, MH-60R helicopters, P-8A maritime patrol aircraft, and VL-ASROC delivery rockets. Official Navy, RTX, NAVAIR, Boeing, and DOT&E sources describe a hybrid MK 46/MK 50 lineage, Mod 1 sonar and processing upgrades, the P-8A HAAWC air-launch accessory path, and a Mod 2 Advanced Lightweight Torpedo modernization still tracked publicly as a development program rather than a conflict-use record.

Sources

USNI: Professional Notes (January 1991)Publisher: United States Naval Institute | Note: Supports DTCN manufacturer context and historical L3/L5 family specifications. | Accessed: 2026-06-29NavWeaps: French TorpedoesPublisher: NavWeaps | Note: Supports L3 and L5 specifications, service dates, L5 Mod 1/3/4 variant distinctions, launch-platform notes, and postwar French torpedo background. | Accessed: 2026-06-29Seaforces: D'Estienne d'Orves-class avisoPublisher: Seaforces.org | Note: Supports the D'Estienne d'Orves-class relation to four fixed catapults for L3 or L5 torpedoes. | Accessed: 2026-06-29ECPAD ImagesDefense: Tir d'une torpille anti-sous-marinePublisher: ECPAD / ImagesDefense | Note: Supports the 2010 Cassard exercise launch of an L5 torpedo and the note that Cassard carried two fixed catapults and ten L5 Mod 4 anti-submarine torpedoes. | Accessed: 2026-06-29GlobalSecurity: Cassard classPublisher: GlobalSecurity.org | Note: Supports the Cassard-class fit of two fixed KD 59E launchers for ECAN L5 Mod 4 anti-submarine torpedoes. | Accessed: 2026-06-29Wikimedia Commons: Lancement torpille L3 3.jpgPublisher: Wikimedia Commons | Note: Supports image provenance and licensing context for the L3 launch photograph used as the primary image. | Accessed: 2026-06-29Wikimedia Commons: L5 Mod 4 torpido.JPGPublisher: Wikimedia Commons | Note: Supports image provenance and licensing context for the L5 display image in the gallery. | Accessed: 2026-06-29