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	10
Retired	7
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 French Navy 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 Strategic Oceanic Force (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. In addition to service in France, they have been ordered by the South African Navy (not delivered), Argentinian Navy and Turkish Navy.

^ Gardiner & Friedman 1983, p. 41.
^ ^a ^b ^c ^d "Patrouilleurs: Les avisos français sur tous les fronts" [Patrol ships: French Avisos on all fronts.]. asafrance.fr (in French). 26 January 2017. Retrieved 6 June 2020.

[FOOTNOTEGardinerFriedman198341-1] Gardiner & Friedman 1983, p. 41.

[auto-2] "Patrouilleurs: Les avisos français sur tous les fronts" [Patrol ships: French Avisos on all fronts.]. asafrance.fr (in French). 26 January 2017. Retrieved 6 June 2020.

[1]

[2]

Class overview
The aviso Lieutenant de vaisseau Lavallée
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	10
Retired	7
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)^[1]
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)^[2]
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)^[2] 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)^[2] 1 × sextuple Bofors 375 mm rocket launcher (removed from French ships when reclassified as OPVs)^[2]