FF-1052 Knox

🇺🇸United States
Todd Shipyard, Seattle and San Pedro, Lockheed Shipbuilding and Construction Company, Avondale Shipyard
1969 – Present
Overview
FF-1052 Knox
The Knox-class frigates were the U.S. Navy's primary anti-submarine warfare vessels during the Cold War, featuring steam turbine powerplants and designed for reduced crew sizes and increased endurance. Decommissioned by 1994 due to budget cuts and the need for advanced capabilities, some remain in service with foreign navies, equipped with sonar systems and various armaments, including ASROC missiles and a 5-inch gun, while undergoing modifications for improved performance and operational flexib
Specifications

General

Crew285
Guns1 x 5-inch / 54 caliber MK 42 gun
Beam M14.3 m
Length M133.5 m
Torpedoes4 x MK-46 torpedoes
Propulsion1 × Westinghouse geared turbine
Helicopters1
Speed Knots27 knots
Main MissilesMk-16 eight-cell missile launcher for ASROC and Harpoon missiles RIM-7 Sea Sparrow BPDMS/Phalanx close-in weapon system (CIWS)
Displacement Tons4,200 tons
Research Notes

Cold War US escort class optimized for anti-submarine warfare

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USS Knox was the lead ship of a large US Navy destroyer-escort and later frigate class built for Cold War anti-submarine warfare. The class was designed to protect convoys, amphibious groups, and underway replenishment forces against Soviet submarines. Its large production run made it one of the defining US escort classes of the late Cold War.

ASROC, sonar, helicopter facilities, and single-screw economy

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Knox-class frigates used a classic ASW layout with bow gun, ASROC launcher, sonar, torpedoes, and helicopter capability. The single-screw steam plant helped control cost but raised survivability and maneuvering concerns compared with twin-screw combatants. The class prioritized submarine-hunting and escort endurance over speed or area air defense.

Widely used US frigate with major foreign second careers

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Knox-class ships served extensively in the US Navy and many later transferred to allied navies, including Taiwan, Turkey, Mexico, and others. That long second life demonstrates the utility of a robust ASW escort hull even after US retirement. The class is important because it shows the scale and export afterlife of US Cold War frigate construction.

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