The Knox Class frigates were designed as anti-submarine warfare platforms for the United States Navy, with 46 ships commissioned between 1969-1974. Equipped with hull-mounted sonars and a helicopter deck, the frigates are also armed with missiles, torpedoes, and a naval gun. Powered by a steam turbine generating 26MW, the Knox Class frigates have a maximum speed of 27 knots and dimensions of 133.5m long, 14.3m wide, and 7.5m draft. Several remain in service today with the navies of Taiwan, Mexico, Turkey, Thailand, and Egypt.

1. Knox Class Frigates,
United States of America

2. INTRODUCTION
• The Knox Class frigates are ex-US Navy ships currently remaining in service
with the Navies of Republic of China (Taiwan), Mexico, Turkey, Thailand and
Egypt. The US Navy put a total of 46 ships into retirement by 1994.
• The keel for the lead ship in the class, USS Knox (FF-1052), was laid in October
1965. The ship was commissioned in April 1969 at the Todd Shipyard in Seattle.
• The final ship of the class, USS Moinester (FF-1097), was commissioned in
November 1974. The Knox Class ships were built at Todd, Avondale and
Lockheed shipyards.

4. DESIGN
• Designed principally as anti-submarine platforms, the Knox Class frigates are
equipped with hull mounted sonars.
• The ship's design incorporates a helicopter deck and a hangar on the aft side.
• The frigate is powered by a steam powerplant. The propulsion system
provides faster acceleration to the ship.
• Knox Class has an overall length of 133.5m, beam of 14.3m and draught of
7.5m.

6. ARMAMENTS
• Knox Class frigates are armed with an Mk-16 eight-cell missile launcher for
ASROC and Harpoon missiles, and a RIM-7 Sea Sparrow basic point defence
missile system (BPDMS) or Phalanx close-in weapon system (CIWS).
• The Sea Sparrow missile can be used against the low-flying aircraft approaching
the ship.
• Four single tube launchers are fitted for Mark 46 torpedoes. The main gun
installed forward is a 127mm 54 calibre Mark 42 gun.

8. COUNTERMEASURES
• The Raytheon AN/SLQ-32 Electronic Warfare (EW)
system on-board provides early warning, identification and
direction capabilities against simultaneous threats.
• The system can be interfaced with decoy launchers for the
firing decoys and chaff to deceive incoming anti-ship
missiles.

10. PROPULSION
• The frigate is powered by a single, screw-geared turbine driving a single
propeller shaft.
• It generates a power output of 26MW. Two boilers installed on the steam
plant are equipped with a high-pressure forced draught air supply system.
• The propulsion system provides the ship a maximum speed of 27kt.

12. REFERENCES
• http://www.naval-
technology.com/projects/knoxclassfrigates/knoxclassfrigates4.html
• http://ussknox.org/images/ff1052_SternShot.jpg
• http://www.naval-
technology.com/projects/knoxclassfrigates/knoxclassfrigates2.html

13. THANK YOU