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From the 1950s to 1975, the US Navy had three types of fast task force escorts and one type of convoy escort. The task force escorts were cruisers (hull classification symbols CAG/CLG/CG), frigates or destroyer-leaders (DL/DLG), and destroyers (DD/DDG); the convoy escorts were ocean escorts (DE/DEG), often called destroyer escorts as they retained the designation and number series of the World ...
A frigate (/ ˈ f r ɪ ɡ ɪ t /) is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied. The name frigate in the 17th to early 18th centuries was given to any full-rigged ship built for speed and maneuverability, intended to be used in scouting, escort and patrol roles. The term was ...
DER: Destroyer escort, radar picket (abolished 30 June 1975) There were two distinct breeds of DER, the DEs which were converted to DERs during World War II and the more numerous postwar DER conversions. DL: Destroyer leader (later frigate) (retired) DLG: Destroyer leader, guided missile (later frigate) (abolished 30 June 1975)
In most cases torpedo and/or dual-purpose gun armament was reduced to accommodate new anti-air and anti-submarine weapons. By this time the destroyers had become large, multi-purpose vessels, expensive targets in their own right. As a result, casualties on destroyers were among the highest.
The program was started by Admiral Arleigh Burke as a response to estimates that the Soviet Navy would have a force of about 300 modern fast-attack submarines by 1957. The U.S. Navy was unable to produce quickly enough the destroyer escorts (redesignated as frigates after 1975) and other antisubmarine warfare ships to counter this threat, given its other priorities in new antiaircraft warfare ...
DER: Radar Picket Destroyer Escort (abolished 30 June 1975) DL: Destroyer Leader (later Frigate) (retired) DLG: Guided Missile Frigate (abolished 30 June 1975) DLGN: Guided Missile Frigate (Nuclear-Propulsion) (abolished 30 June 1975) DM: Destroyer Minelayer (retired) DMS: Destroyer Minesweeper (retired) DSRV: Deep Submergence Rescue Vehicle
The LCS's utility against high-tech enemies would be when working with and being covered by destroyers, like they do with aircraft carriers. With destroyers providing extended air and missile defense, the cheaper (one-fourth the cost of a destroyer) and more numerous LCS can sweep for mines and deploy more sophisticated submarine-detecting sonar.
Prior to the 1975 ship reclassification, ships that are now classified as FF or FFG were classified as DE or DEG (destroyer escort). The Oliver Hazard Perry class has been retired from active duty in the Navy as of 2015, and use has been replaced by the Littoral Combat Ship, to be augmented by the planned Constellation class guided-missile ...