The F67 type, also known as the Tourville class was a class of large high-sea (blue water) Frigates of the French Navy specialised in anti-submarine warfare. They had anti-air and anti-surface capabilities.

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Quick Facts Class overview, General characteristics ...

De Grasse
Class overview
Name	Tourville class
Operators	French Navy
Preceded by	Aconit
Succeeded by	Georges Leygues class
Completed	3
Retired	3
General characteristics
Type	Frigate
Displacement	4,580 tonnes  standard 6,100 tonnes  fully loaded
Length	152.75 m (501 ft 2 in)
Beam	15.80 m (51 ft 10 in)
Draught	6.60 m (21 ft 8 in)
Propulsion	2 × Rateau steam turbines, double reduction 4 × multi-tubular boilers 2 × fixed propellers 58,000 shp (43,251 kW) Fuel: Gazoil
Speed	32 knots (59 km/h; 37 mph)
Range	1,900 nmi (3,500 km; 2,200 mi) at 30 kn (56 km/h; 35 mph) 4,500 nmi (8,300 km; 5,200 mi) at 18 kn (33 km/h; 21 mph)
Complement	24 officers 160 non-commissioned officers 115 men
Sensors and processing systems	DRBV 51B surface sentry radar DRBV 26A air sentry radar DRBC 32D targeting radar 2 × DRBN 34 navigation radars DUBV 23 hull sonar ETBF DSBV 62C sonar DSBX 1 towed sonar Syva torpedo alert system SENIT 3 tactical data processing SEAO/OPSMER combat decision-making system HF, UHF, VHF and SHF liaison systems Syracuse 2 Inmarsat Link 11
Electronic warfare & decoys	ARBB 32 jammer ARBR 16 radar interceptor 2 × Syllex decoy launchers Bubble belt
Armament	Anti-ship; 6 × Exocet MM38 anti-ship missiles Anti-submarine; 2 × L5 torpedo launchers, 10 torpedoes on board (L5 mod 4) Guns; 2 × 100 mm turrets (1968 model) 2 × 20 mm cannons 4 × 12.7 mm machine guns CIWS; 1 × Crotale EDIR CIWS anti-air missiles (8 missiles on launcher, 16 in magazine)
Aircraft carried	2 × Lynx WG13 anti-ship helicopters

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Between 1994 and 1996, Tourville and De Grasse were refitted with the modern SLASM anti-submarine system, and active Very Low Frequency (VLF) sonar.

The ships are an enlarged version of the frigate Aconit. They have two shaft steam turbine machinery and a double hangar for two Lynx WG13 helicopters. They were the first ships fitted with the marine version of the Crotale surface-to-air missile system. A Malafon anti-submarine missile system was fitted when the ships were built but this was removed during refits in the late 1980s.

Optimized for anti-submarine warfare, and carrying towed as well as hull-mounted sonar arrays, the Tourvilles were typically placed in the destroyer category of warship and carry destroyer pennant numbers. Similar in many regards to the unmodified Spruance-class destroyers, they carried a similar combination of sensors, naval guns, anti-ship and anti-submarine weapons, aircraft and surface-to-air missiles. Additionally, they were well-regarded for their seakeeping, serving much of their careers in the Atlantic rather than with France's Mediterranean fleet.^[1]

The three ships of the class, D612 De Grasse, D611 Duguay-Trouin and D610 Tourville, are named major figures from French naval history. De Grasse and Tourville were French admirals and Duguay-Trouin coming to fame as a privateer.

The three ships of the class were all constructed by Arsenal de Lorient.