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.
For ASW operations, the D'Estienne d'Orves class mounts four fixed catapults for L3 or L5 type torpedoes with no reloads carried and one remote-controlled sextuple 375 mm (14.8 in) rocket launcher, with 30 reloads carried in a magazine located beneath the aft deckhouse.
The DUBA 25 is situated in a fixed dome with a retractable transducer, but is designed strictly for use in coastal waters.
[4][5] Beyond the Nixie countermeasure system, the funnels aboard the avisos were heightened due to issues with the gases coming from them.
Commandant L'Herminier had SEMT Pielstick 12 PA 6 BTC diesels with infrared suppression systems installed which led to delays into the vessel's entry into service.
In 1993, Commandant Blaison and Enseigne de vaisseau Jacoubert had their rocket launchers removed and a Syracuse II satcom terminal installed.
The two ships were renamed Good Hope and Transvaal, but due to UN sanctions against South Africa, they were not delivered and were bought by the Argentine Navy on 25 December 1978.