The 1975 ship reclassification changed the Ocean Escorts (DE/DEG) to Frigates (FF/FFG) to be in line with other nations' classifications.
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The Bronstein class frigates were United States Navy warships, originally laid down as ocean escorts (formerly called destroyer escorts), but were all redesignated as frigates on 30 June 1975 in the United States Navy 1975 ship reclassification and their hull designation changed from DE to FF.
Burak-class corvette (Turkish: Burak sınıfı korvet), aka B-class corvette, is a warship class of the Turkish Navy, all ex-D'Estienne d'Orves class A69 type Aviso corvettes, mainly designed for coastal anti-submarine defense and ocean escort missions.