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.
All DEs, DEGs, and DERs were reclassified as FFs, FFGs, or FFRs on June 30, 1975 by the United States Navy 1975 ship reclassification.
Knox-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 USN 1975 ship reclassification and their hull designation changed from DE to FF.
The 1975 ship reclassification changed the Ocean Escorts (DE/DEG) to Frigates (FF/FFG) to be in line with other nations' classifications.
List of frigates of the United States Navy subset of above with hull numbers DE/FF 1037 and higher plus all DEG/FFGs because of the United States Navy 1975 ship reclassification
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