GlobalMilitary.net Open-source military intelligence Updated daily
Head-to-head

FF-1052 Knox vs Type 21

Change comparison vs
Specifications
FF-1052 Knox Type 21
Origin 🇺🇸 United States 🇬🇧 United Kingdom
Category Frigate Frigate
Type Frigate Frigate
Manufacturer Todd Shipyard Yarrow Shipbuilders
Year introduced 1969 1974
Number built 46 units 8 units
Estimated unit price NA $60 million
Displacement 4,130 tons 3,250 tons
Maximum speed 27.0 knots 37.0 knots
Range 4,500 nm at 20 knots 4,000 nm at 1200 knots
Length 134.0 m 117.0 m
Beam 14.3 m 12.7 m
Crew 257 177
Performance Radar Chart
Armament & Systems
FF-1052 Knox Type 21
Armament
  • 1 × 5 in (127 mm)/54 caliber Mark 42 gun
  • 1 × Mk-16 8–cell ASROC launcher
  • 2 × dual Mark 32 Mark 46 torpedo launchers
  • 1 × Mk-25 8–cell RIM-7 Sea Sparrow
  • 1 × Mk-29 8–cell RIM-7H Improved Sea Sparrow
  • 1 × Phalanx CIWS
  • Harpoon anti-ship missiles
  • 1 × 4.5 in (114 mm) Vickers Mark 8 gun
  • 2 × 20 mm Oerlikon guns (later 4)
  • 1 × 4-rail launcher for GWS-24 Sea Cat
  • 2 × 8-barrelled Knebworth Corvus countermeasures launchers
  • 4 × launchers for MM38 Exocet surface-surface missiles
  • 2 × 12.75 in (324 mm) 3-tube STWS-1 anti-submarine torpedo launchers
  • TKWA/MASS (Multi Ammunition Softkill System)
  • 2 x 4-cell Harpoon missile launchers
  • 1 x 6-cell LY-60N Hunting Eagle SAM launcher
  • 1 × Vulcan Phalanx 20mm CIWS
Propulsion 1 × Westinghouse steam turbine, 2 × 1,200 psi boilers, 35,000 shp COGOG on 2 shafts; 2 × Tyne cruise turbines: 8,500 shp (6,300 kW); 2 × Olympus boost turbines: 50,000 shp (37,000 kW)

Overview

The FF-1052 Knox and the Type 21 are both Frigate classes.

Displacement is 4,130 tons for the FF-1052 Knox vs 3,250 tons for the Type 21. The FF-1052 Knox reaches 27 knots vs 37 knots for the Type 21. Operational range is 4,500 nautical miles for the FF-1052 Knox vs 4,000 for the Type 21. The FF-1052 Knox carries a crew of 257 vs 177 for the Type 21.

The FF-1052 Knox was produced in 46 units vs 8 for the Type 21. The FF-1052 Knox was commissioned in 1969, 5 years before the Type 21 (1974).

Related Comparisons
FF-1052 Knox vs Oliver Hazard Perry FF-1052 Knox vs Riga FF-1052 Knox vs Petya FF-1052 Knox vs Chi Yang FF-1052 Knox vs Type 053H FF-1052 Knox vs Krivak

Frequently Asked Questions

Which has greater displacement, the FF-1052 Knox-class or Type 21-class?
The FF-1052 Knox-class has greater displacement at 4,130 tons compared to the Type 21-class's 3,250 tons.
Which is faster, the FF-1052 Knox-class or Type 21-class?
The Type 21-class is faster with a maximum speed of 37 knots compared to the FF-1052 Knox-class's 27 knots.
Which has longer range, the FF-1052 Knox-class or Type 21-class?
The FF-1052 Knox-class has a longer range at 4,500 nautical miles compared to the Type 21-class's 4,000 nautical miles.
Which is longer, the FF-1052 Knox-class or Type 21-class?
The FF-1052 Knox-class is longer at 134.0 meters compared to the Type 21-class's 117.0 meters.
How many crew members do the FF-1052 Knox-class and Type 21-class have?
The FF-1052 Knox-class has a larger crew complement of 257 compared to the Type 21-class's 177 crew members.
Which has been built in greater numbers, the FF-1052 Knox-class or Type 21-class?
The FF-1052 Knox-class has been built in greater numbers with 46 vessels compared to 8 vessels of the Type 21-class.