 Further upgrades including receiving a SENIT 2 action information centre within the bridge superstructure towards the aft and in 1979, two ships, "Dupetit-Thouars" and "Du Chayla", had their DRBV 11 air search radar exchanged with a DRBV 22 system.Only the forward set of torpedo tubes were kept.Five ships – "D'Estrées", "Maillé-Brézé", "Vauquelin", "Casabianca" and "Guépratte" – were modernised as anti-submarine destroyers in 1968–1970.