page_title: QF 4.5-inch Mk I – V naval gun
section_title: Naval service
hierarchical_section_title: QF 4.5-inch Mk I – V naval gun / Naval service
caption_attribution_description: English: HMS Dunkirk (D09), Royal Navy destroyer
context_page_description: The QF 4.5 inch gun has been the standard medium-calibre naval gun used by the Royal Navy as a medium-range weapon capable of use against surface, aircraft and shore bombardment targets since 1938. 5 inch Mark 8 naval gun.
  Like all British nominally 4.5 inch naval guns, the QF Mk I has an actual calibre of 4.45 inches.
context_section_description: Ships with 4.5 inch guns QF Mark I in twin mounting UD Mark III
  aircraft carrier HMS Ark Royal
  Dido-class cruisers HMS Scylla and HMS Charybdis
  naval auxiliaries
  Ships with 4.5 inch guns QF Mark III in twin mounting BD Mark II
  Reconstructed Queen Elizabeth-class battleships HMS Queen Elizabeth and HMS Valiant
  Reconstructed Renown-class battlecruiser HMS Renown
  Illustrious-class aircraft carrier
  Implacable-class aircraft carrier
  Aircraft carrier HMS Indomitable
  Destroyer HMS Savage
  Ships with 4.5 inch guns QF Mark III in twin mounting BD Mark II**
  Audacious-class aircraft carriers, HMS Eagle and HMS Ark Royal
  Ships with 4.5 inch guns QF Mark III in twin mounting BD Mark IV
  Battle-class destroyer
  Nueva Esparta-class destroyers D-11 Nueva Esparta, D-21 Zulia and D-31 Aragua
  Ships with 4.5 inch guns QF Mark IV in single mounting CP Mark V
  Destroyer HMS Savage
  Z-class destroyers
  Ca, Ch, Co and Cr-class destroyers
  "1942" Battle-class destroyers
  Ships with 4.5 inch guns Mark 5* (rebuilt mounting CP Mark V).
  Rebuilt Ca-class destroyers (Mark 5* Mod 1)
  Type 81 Tribal-class frigates (Mark 5* Mod 2)
  Ships with 4.5 inch guns QF Mark V in twin mounting UD Mark VI (later renamed gun Mark 6)
  Battle-class destroyers - "1943" or "Australian Battle" class
  Daring-class destroyers
  County-class destroyers
  Type 12 Whitby-class frigates
  Type 12I Rothesay-class frigates
  Type 12M Leander-class frigates
  Van Speijk-class frigates - Netherlands Navy versions of Leander class
  River-class destroyer escorts - Australian versions
  Condell-class frigates - Chilean versions
  Type 41 Leopard-class frigates
  Type 61 Salisbury-class frigates
caption: The Battle-class destroyer HMS Dunkirk, with two twin mountings BD Mark IV for Mark III guns.
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