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Ocean escorts were an evolution of the World War II destroyer escort types. They were intended as convoy escorts and were designed for mobilization production in wartime or low-cost mass production in peacetime.
Their hull classification symbol was DE, a carryover from the World War II era when the vessels were classified as destroyer escorts. DEs were ASW vessels; DEGs were AAW vessels with the short-range Tartar guided missile.
The ocean escort type corresponded to other nations' frigates (convoy escorts).
The 1975 ship reclassification changed the ocean escorts (DE/DEG) to frigates (FF/FFG) to be in line with other nations' classifications.
The US Navy intends to replace all existing frigates with the littoral combat ship.
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