US CIWS Phalanx 20 mm

Close-In Weapon System


  • Close-In Weapon System CIWS Phalanx 20 mm

Last line of defense against air attacks, R2D2 was first tested in 1973 and introduced into service in 1980. Since then, all types of ships has been retroffited to carry at least one of them


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20caliber (mm)
4500Rate of fire (round/min)
1.50range (km)

Used by

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0UK Aircraft Carrier V STOL Queen Elizabeth class3
1961US Assault Carrier Iwo Jima class2
1964US Support Ship Sacramento class2
1965US Aircraft Carrier America (1965) class3
1965UK Landing Ship/Platform Dock Fearless class2
1965US Coast Guards Hamilton class1
1968US Aircraft Carrier John F Kennedy class3
1968US Support Ship Kilauea class1
1969US Support Ship Wichita class2
1969CA Support Ship Protecteur class2
1970US Command ship Blue Ridge class1
1973JP Helicopter Carrier Haruna class2
1975US Guided-Missile Frigate Oliver Hazard Perry class1
1975US Aircraft Carrier (Nuclear Powered) Nimitz class4
1976JP Guided-Missile Destroyer Tachikaze class2
1976US Assault Carrier Tarawa class2
1980UK Guided-Missile Destroyer Type 42 (Batch 3)2
1980AU Guided-Missile Frigate Adelaide class1
1980UK Aircraft Carrier V STOL Invincible class3
1981US Support Ship Cimarron class2
1981US Guided-Missile Destroyer Kidd class2
1983US Guided-Missile Cruiser Ticonderoga class2
1986US Aircraft Carrier (Nuclear Powered) Improved Nimitz class4
1986JP Guided-Missile Destroyer Hatakaze class2
1986JP Destroyer Asagiri class2
1989JP Frigate Abukuma class1
1989US Assault Carrier Wasp class3
1990PT Frigate Vasco da Gama class1
1991CA Guided-Missile Destroyer Iroquois TRUMP class1
1991US Guided-Missile Destroyer Arleigh Burke Flight I class2
1992CA Frigate City class1
1992UK Support Ship Fort II class (1992)2
1992GR Frigate Hydra class2
1993TW Guided-Missile Frigate Cheng Kung class1
1993IL Corvette Sa'ar 5-class1
1993JP Guided-Missile Destroyer Kongo class2
1994TH Frigate Phutthayotfa Chulalok class1
1995US Landing Ship/Platform Dock Harpers Ferry class2
1996JP Destroyer Murasame class2
1998UK Assault Carrier Ocean class3
1998JP Landing Ship/Platform Dock Osumi class2
2003JP Destroyer Takanami class2
2003UK Support Ship Wave class2
2006UK Landing Ship/Platform Dock Bay class2
2007JP Guided-Missile Destroyer Atago class2
2009JP Helicopter Carrier Hyuga class2
2012JP Destroyer Akizuki 2010 class2
2013KR Guided-Missile Frigate Incheon class1
2014US Assault Carrier America (2014) class2
2017AU Guided-Missile Destroyer Hobart class1
2017US Aircraft Carrier (Nuclear Powered) Ford class2
2022UK Frigate Type 26 class2


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1980-apr US USS America CV-66 Aircraft Carrier America (1965) class3x CIWS fitted during refit
1989 UK HMS Fearless L10 Landing Ship/Platform Dock Fearless classrefit at HMD Devonport, including replacement of guns and Seacat for new 20mm and Phalanx CIWS. Completed 1991.
1990 UK HMS Edinburgh D97 Guided-Missile Destroyer Type 42 (Batch 3)included addition of a pair of Phalanx CIWS, completed 1991
1999 UK RFA Fort George A388 Support Ship Fort II class (1992)fitted with Phalanx CIWS
1999-feb-1 UK RFA Fort Victoria A387 Support Ship Fort II class (1992)refit at Babcocks, until Jun 1999, fitted with Phalanx CIWS
2017-mar UK HMS Albion L14 Landing Ship/Platform Dock Albion classReceived 2 sets of Phalanx to replace Goalkeeper. Rejoined the Fleet after refit on 21 Jul.

In Service

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UK Royal Navy
US United States Naval Aviation
US US Coast Guard
BD bangladesh navy
NG Nigerian Navy
CA Canadian Armed Forces
JP Japanese Navy
TR Turkish Navy
BH Royal Bahrain Naval Force
PL Polish Navy
EG Egyptian Navy
AU Royal Australian Navy
PT Portuguese Navy
UK Royal Fleet Auxiliary
GR Hellenic Navy
IL Israeli Navy
TW Republic of China Navy (Taiwan)
TH Royal Thai Navy
KR Republic of Korea Navy

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