Georges Leygues-class frigate

	Montcalm
Class overview
Name	Georges Leygues class
Builders	Brest arsenal
Operators	French Navy
Preceded by	Tourville class
Succeeded by	Aquitaine class (anti-submarine variant)
Built	1974–1988
In commission	10 December 1979 – 1 July 2022
Completed	7
Retired	7
General characteristics
Type	Frigate
Displacement	3,550 t (3,494 long tons); 4,500 t (4,429 long tons) full load;
Length	139 m (456 ft 0 in)
Beam	14 m (45 ft 11 in)
Draught	5.7 m (18 ft 8 in)
Propulsion	CODOG; 2 × Rolls-Royce Olympus TM3B gas turbines, 26,000 hp (19,388 kW) each; 2 × SEMT Pielstick 16PA6-V280 diesel engines, 5,200 hp (3,878 kW) each;
Speed	30 knots (56 km/h; 35 mph)
Range	7,400 nmi (13,700 km; 8,500 mi)
Complement	235
Armament	Anti-ship:; 4 x MM38 Exocet anti-ship missiles ; Units from D642 subsequently upgraded to 8 x MM40 Exocet; Anti-submarine:; 2 × fixed torpedo tubes (10 × L5 mod 4 or MU90 torpedoes); Guns:; 1 × Creusot-Loire Compact 100 mm/55 Mod 68 DP gun; 2 × 30 mm Breda-Mauser or 20 mm F2 anti-aircraft guns; 2/4 × 12.7 machine guns; CIWS:; 1 × Crotale Navale EDIR octuple launcher (26 × CIWS anti-air missiles); 2 × Simbad twin launcher (Mistral 4 × CIWS anti-air missiles);
Aircraft carried	2 × Westland Lynx anti-ship helicopters (retired 2020); From 2020: AS565 Panther or Alouette III (on remaining vessel D646)

The Georges Leygues class (Type C70 AS or Type F70 AS) was a class of anti-submarine destroyers of the French Navy.^[3] They were multi-role ships due to their Exocet and Crotale missile armament, making them especially suitable for the defence of strategic positions, show of force operations, or as high seas escorts. The design was initially officially known as a "corvette" with the designation C70, but were internationally labelled an "anti-submarine destroyer" (hence the "D" in the hull numbers).^[4] Subsequently, the French referred to the ships as "frigates" with the designation F70.^[5]

^ "Georges Leygues class anti-submarine destroyer Type F70 ASW Anti-submarine Frigate Frégates anti-sous-marins FASM D640 D641 D642 D643 D644 D645 D646 DUBV-43 DSBV-61 Marine Nationale French Navy DCNS datasheet pictures photos video specifications". navyrecognition.com. Retrieved 15 June 2021.
^ Grolleau, Henri-Pierre (5 July 2019). "French Navy brings forward Lynx retirement". Janes.com. Retrieved 15 June 2021.
^ Avery, Derek (1987). Modern Warships. London: Collins. pp. 80–81. ISBN 0-00-458855-X.
^ Ireland, Bernard (1984). Navies of the West. London: Ian Allan. p. 26. ISBN 0-71-101339-X.
^ "Retrait définitif du service pour la frégate Georges Leygues" (in French). ActuNautique.com. 24 March 2014. Retrieved 19 November 2014.

[1] "Georges Leygues class anti-submarine destroyer Type F70 ASW Anti-submarine Frigate Frégates anti-sous-marins FASM D640 D641 D642 D643 D644 D645 D646 DUBV-43 DSBV-61 Marine Nationale French Navy DCNS datasheet pictures photos video specifications". navyrecognition.com. Retrieved 15 June 2021.

[2] Grolleau, Henri-Pierre (5 July 2019). "French Navy brings forward Lynx retirement". Janes.com. Retrieved 15 June 2021.

[avery-3] Avery, Derek (1987). Modern Warships. London: Collins. pp. 80–81. ISBN 0-00-458855-X.

[4] Ireland, Bernard (1984). Navies of the West. London: Ian Allan. p. 26. ISBN 0-71-101339-X.

[a1-5] "Retrait définitif du service pour la frégate Georges Leygues" (in French). ActuNautique.com. 24 March 2014. Retrieved 19 November 2014.

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Class overview
Montcalm
Name	Georges Leygues class
Builders	Brest arsenal
Operators	French Navy
Preceded by	Tourville class
Succeeded by	Aquitaine class (anti-submarine variant)
Built	1974–1988
In commission	10 December 1979 – 1 July 2022
Completed	7
Retired	7
General characteristics
Type	Frigate
Displacement	3,550 t (3,494 long tons) 4,500 t (4,429 long tons) full load
Length	139 m (456 ft 0 in)
Beam	14 m (45 ft 11 in)
Draught	5.7 m (18 ft 8 in)
Propulsion	CODOG 2 × Rolls-Royce Olympus TM3B gas turbines, 26,000 hp (19,388 kW) each 2 × SEMT Pielstick 16PA6-V280 diesel engines, 5,200 hp (3,878 kW) each
Speed	30 knots (56 km/h; 35 mph)
Range	7,400 nmi (13,700 km; 8,500 mi)
Complement	235
Armament	Anti-ship: 4 x MM38 Exocet anti-ship missiles Units from D642 subsequently upgraded to 8 x MM40 Exocet^[1] Anti-submarine: 2 × fixed torpedo tubes (10 × L5 mod 4 or MU90 torpedoes) Guns: 1 × Creusot-Loire Compact 100 mm/55 Mod 68 DP gun 2 × 30 mm Breda-Mauser or 20 mm F2 anti-aircraft guns 2/4 × 12.7 machine guns CIWS: 1 × Crotale Navale EDIR octuple launcher (26 × CIWS anti-air missiles) 2 × Simbad twin launcher (Mistral 4 × CIWS anti-air missiles)
Aircraft carried	2 × Westland Lynx anti-ship helicopters (retired 2020);^[2] From 2020: AS565 Panther or Alouette III (on remaining vessel D646)