D'Estienne d'Orves-class aviso

	The aviso Lieutenant de vaisseau Lavallée
Class overview
Name	D'Estienne d'Orves class or A69 type
Operators	French Navy; Turkish Navy; Argentine Navy;
Preceded by	Commandant Rivière class
Succeeded by	Floréal class; La Fayette class; Patrouilleurs Hauturiers (from 2026);
Subclasses	Drummond class; Burak class;
Completed	17
Active	12
Laid up	3
Scrapped	2
General characteristics
Type	Aviso
Displacement	1,100 t (1,100 long tons) standard ; 1,270 t (1,250 long tons) full load;
Length	80 m (262 ft 6 in) oa; 76 m (249 ft 4 in) pp;
Beam	10.3 m (33 ft 10 in)
Draught	5.3 m (17 ft 5 in); 3 m (9 ft 10 in);
Propulsion	2 SEMT Pielstick 12 PC 2 V400 diesel engines; 8,900 kW (12,000 bhp), 2 shafts;
Speed	23.5 knots (43.5 km/h; 27.0 mph)
Range	4,500 nmi (8,300 km; 5,200 mi) at 15 knots (28 km/h; 17 mph)
Complement	90
Sensors and ; processing systems	1 Air/surface DRBV 51A sentry radar; 1 DRBC 32E fire control radar; 1 Decca 1226 navigation radar; 1 DUBA 25 hull sonar (removed from French vessels when reclassified as OPVs);
Electronic warfare ; & decoys	1 ARBR 16 radar interceptor; 2 Dagaie decoy launchers; 1 SLQ-25 Nixie countermeasure system;
Armament	2 Exocet MM38 SSMs (removed from French ships when reclassified as OPVs); 1 × 100 mm CADAM gun turret with Najir fire control system and CMS LYNCEA; 2 × 20 mm modèle F2 guns; 4 × 12.7 mm machine guns; 4 × L3 or L5 type torpedoes in four fixed catapults (removed from French ships when reclassified as OPVs); 1 × sextuple Bofors 375 mm rocket launcher (removed from French ships when reclassified as OPVs);

The D'Estienne d'Orves-class avisos, also known as the A69 type avisos, is a class of avisos, comparable in size to a light corvette, mainly designed for coastal anti-submarine defence, but are also available for high sea escort missions (notably in support missions with the FOST). Built on a simple and robust design, they have an economical and reliable propulsion system which allows them to be used for overseas presence missions. They were initially intended for use by the French Navy, but have been ordered by the South African Navy (not delivered), Argentinian Navy and Turkish Navy.

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