''Jean de Vienne'' was one of seven F70 type

guided-missile frigate A frigate () is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied. The name frigate in the 17th to early 18th centuries was given to any full-rigged ship built for speed and maneuvera ...

built for the French ''

Marine Nationale The French Navy (, , ), informally (, ), is the maritime arm of the French Armed Forces and one of the four military service branches of France. It is among the largest and most powerful naval forces in the world recognised as being a blu ...

'' during the 1980s. Completed in 1984, she served during the

Cold War The Cold War was a period of global Geopolitics, geopolitical rivalry between the United States (US) and the Soviet Union (USSR) and their respective allies, the capitalist Western Bloc and communist Eastern Bloc, which lasted from 1947 unt ...

. Her complement was 20% female.

Design and description

The ''Georges Leygues''-class ships were designed as anti-submarine (ASW) escorts for the fleet. They had an

overall length The overall length (OAL) of an ammunition cartridge is a measurement from the base of the brass shell casing to the tip of the bullet, seated into the brass casing. Cartridge overall length, or "COL", is important to safe functioning of reloads i ...

of , a beam of and a draught of . The ships had a

standard displacement The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into wei ...

of and at

full load The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weig ...

. The ''Georges Leygues''s' propulsion machinery used a CODOG configuration with one SEMT-Pielstick 16PA6-V280

diesel engine The diesel engine, named after the German engineer Rudolf Diesel, is an internal combustion engine in which Combustion, ignition of diesel fuel is caused by the elevated temperature of the air in the cylinder due to Mechanics, mechanical Compr ...

and a Rolls-Royce Olympus TM3B

gas turbine A gas turbine or gas turbine engine is a type of Internal combustion engine#Continuous combustion, continuous flow internal combustion engine. The main parts common to all gas turbine engines form the power-producing part (known as the gas gene ...

were coupled to each of the two

propeller shaft A drive shaft, driveshaft, driving shaft, tailshaft (Australian English), propeller shaft (prop shaft), or Cardan shaft (after Girolamo Cardano) is a component for transmitting mechanical power, torque, and rotation, usually used to connect o ...

s. The diesels were used for speeds under and the gas turbines for sprints up to . The diesels were rated at a total of and the turbines at a total of . The combination give the ships a range of at . The frigates had a complement of 216 sailors. The primary anti-ship weapon of the ''Georges Leygues''s consisted of four single box launchers for MM40

Exocet The Exocet () is a French-built anti-ship missile whose various versions can be launched from Warship, surface vessels, Submarine, submarines, Helicopter, helicopters and fixed-wing aircraft. Etymology The missile's name was given by M. Guil ...

anti-ship missile An anti-ship missile (AShM or ASM) is a guided missile that is designed for use against ships and large boats. Most anti-ship missiles are of the sea-skimming variety, and many use a combination of inertial guidance and active radar homing. ...

s, located aft of the

funnel A funnel is a tube or pipe that is wide at the top and narrow at the bottom, used for guiding liquid or powder into a small opening. Funnels are usually made of stainless steel, aluminium, glass, or plastic. The material used in its constructi ...

with two launchers on each broadside. The frigates were designed with a single Modèle 1968

dual-purpose gun A dual-purpose gun is a naval artillery mounting designed to engage both surface and air targets. Description Second World War-era capital ships had four classes of artillery: the heavy main battery, intended to engage opposing battleships and ...

in a single-

gun turret A gun turret (or simply turret) is a mounting platform from which weapons can be fired that affords protection, visibility and ability to turn and aim. A modern gun turret is generally a rotatable weapon mount that houses the crew or mechanis ...

forward of the

superstructure A superstructure is an upward extension of an existing structure above a baseline. This term is applied to various kinds of physical structures such as buildings, bridges, or ships. Aboard ships and large boats On water craft, the superstruct ...

. They were also equipped with two guns. The ships were fitted with a octuple Crotale anti-aircraft missile launcher with 26 reloads located on the aft superstructure. The anti-submarine, (ASW) weapons of the ''Georges Leygues''-class ships consisted of two

torpedo launcher A torpedo tube is a cylindrical device for launching torpedoes. There are two main types of torpedo tube: underwater tubes fitted to submarines and some surface ships, and deck-mounted units (also referred to as torpedo launchers) installed aboa ...

s , one on each side of the ship. Each ship carried ten torpedoes. The ships were designed to carry helicopters, a pair of

Westland Lynx The Westland Lynx is a British multi-purpose twin-engined military helicopter designed and built by Westland Helicopters at its factory in Yeovil. Originally intended as a utility craft for both civil and naval usage, military interest led to t ...

ASW helicopters in a double

hangar A hangar is a building or structure designed to hold aircraft or spacecraft. Hangars are built of metal, wood, or concrete. The word ''hangar'' comes from Middle French ''hanghart'' ("enclosure near a house"), of Germanic origin, from Frankish ...

at the stern. They were completed with a DRBV 51C

search radar This is a list of different types of radar. Detection and search radars Search radars scan great volumes of space with pulses of short radio waves. They typically scan the volume two to four times a minute. The radio waves are usually less than a ...

, a DRBC 32E

fire-control radar A fire-control radar (FCR) is a radar that is designed specifically to provide information (mainly target azimuth, elevation, range and range rate) to a fire-control system in order to direct weapons such that they hit a target. They are someti ...

and a DRBV 26

early-warning radar An early-warning radar is any radar system used primarily for the long-range detection of its targets, i.e., allowing defences to be alerted as ''early'' as possible before the intruder reaches its target, giving the air defences the maximum tim ...

. For anti-submarine warfare, they were equipped with a DUBV 23B hull-mounted

sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects o ...

and DUBV 43B towed

variable depth sonar Sonar (sound navigation and ranging or sonic navigation and ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, measure distances ( ranging), communicate with or detect objects o ...

. For electronic defence, the vessels mounted two Syllex

chaff Chaff (; ) is dry, scale-like plant material such as the protective seed casings of cereal grains, the scale-like parts of flowers, or finely chopped straw. Chaff cannot be digested by humans, but it may be fed to livestock, ploughed into soil ...

launchers. The SENIT 4 tactical data system coordinated sensor data.

Construction and carer

''Jean de Vienne'' was

laid down Laying the keel or laying down is the formal recognition of the start of a ship's construction. It is often marked with a ceremony attended by dignitaries from the shipbuilding company and the ultimate owners of the ship. Keel laying is one ...

on 26 October 1979 and launched 17 November 1981. She was accepted into the French navy on 25 May 1984. During the 1991

Gulf War , combatant2 = , commander1 = , commander2 = , strength1 = Over 950,000 soldiers3,113 tanks1,800 aircraft2,200 artillery systems , page = https://www.govinfo.gov/content/pkg/GAOREPORTS-PEMD-96- ...

, ''Jean de Vienne'' was reported as the only French naval vessel to have been part of surface forces under the operational command and control of the United States. In 2001, ''Jean de Vienne'' was part of the task force deployed to the Indian Ocean as part of Opération Héraklès, the initial French contribution to the

War in Afghanistan War in Afghanistan, Afghan war, or Afghan civil war may refer to: *Conquest of Afghanistan by Alexander the Great (330 BC – 327 BC), the conquest of Afghanistan by the Macedonian Empire * Muslim conquests of Afghanistan, a series of campaigns in ...

. While deployed there, she was part of the escort for the aircraft carrier . In 2011, the ship deployed as part of

Opération Harmattan Opération Harmattan was the French participation in the 2011 military intervention in Libya. It was named for the Harmattan, which are hot dry winds that blow over the Sahara, mostly between November and March. The United States' counterpart t ...

, the French contribution to

NATO The North Atlantic Treaty Organization (NATO ; , OTAN), also called the North Atlantic Alliance, is an intergovernmental organization, intergovernmental Transnationalism, transnational military alliance of 32 Member states of NATO, member s ...

's involvement in the military intervention in Libya.

References

Bibliography

* * *

External links

''Jean de Vienne'' at the French navy website
{{DEFAULTSORT:Jean de Vienne Frigates of France Georges Leygues-class frigates 1981 ships Ships built in France