page_title: 5"/54 caliber Mark 42 gun
section_title: Users
hierarchical_section_title: 5"/54 caliber Mark 42 gun / Users
caption_attribution_description: English: Map with ship operators with 5-54 caliber Mark 42 guns
context_page_description: The Mark 42 5"/54 caliber gun is a naval gun mount used by the United States Navy and other countries. It consisted of the Mark 18 gun and Mark 42 gun mount. United States naval gun terminology indicates the gun fires a projectile 5 inches in diameter, and the barrel is 54 calibers long In the 1950s a gun with more range and a faster rate of fire than the 5"/38 caliber gun used in World War II was needed, therefore, the gun was created concurrently with the 3"/70 Mark 26 gun for different usages. The 5"/54 Mk 42 is an automatic, dual-purpose gun mount. It is usually controlled remotely from the Mk 68 Gun Fire Control System, or locally from the mount at the One Man Control station.
  The self-loading gun mount weighs about 60.4 long tons including two drums under the mount holding 40 rounds of semi-fixed case type ammunition. The gun fires 31.75 kg projectiles at a velocity of 2,650 ft/s. Maximum rate of fire is 40 rounds per minute. Magazine capacity is 599 rounds per mount.
context_section_description:  United States
  United States Navy
  First used on USS Northampton
  Forrestal-class aircraft carrier (later removed during upgrade)
  Belknap-class cruiser and USS Truxtun
  Charles F. Adams-class destroyer
  Farragut-class destroyer
  Forrest Sherman-class destroyer
  Mitscher-class destroyer
  Knox-class frigate
   Australia
  Royal Australian Navy
  Perth-class destroyer (modified Charles F. Adams class)
   Egypt
  Egyptian Navy
  Damiyat-class frigate (ex-USN Knox-class frigates)
   Germany
  German Navy
  Lütjens-class destroyer (modified Charles F. Adams class)
   Greece
  Hellenic Navy
  Ipiros-class frigate (ex-USN Knox-class frigates)
  Kimon-class destroyer (ex-USN Charles F. Adams-class destroyer)
   Japan
  Japan Maritime Self-Defense Force
  Tachikaze-class destroyer
  Hatakaze-class destroyer
  Haruna-class destroyer
  Takatsuki-class destroyer
  Shirane-class destroyer
   Mexico
  Mexican Navy
  Ignacio Allende-class frigate (ex-USN Knox-class frigates)
   Spain
  Spanish Navy
  Baleares-class frigate (modified Knox class)
   Taiwan
  Republic of China Navy
  Chih Yang-class frigate (modified ex-USN Knox class)
   Thailand
  Royal Thai Navy
  Phutthayotfa Chulalok-class frigate (ex-USN Knox-class frigates)
   Turkey
  Turkish Navy
  Muavenet-class frigate (ex-USN Knox-class frigates)
caption: Map with current ship operators with 5-54 caliber Mark 42 guns
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