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 targets since 1938. This article c
Mk III guns in BD 'RP10' Mk II mountings on Implacable-class aircraft carrier. A King George V-class battleship (1939) can be seen in the background.
Gunner with early fixed round, 1942
Twin Mark III guns on Illustrious-class aircraft carrier HMS Formidable
The Battle-class destroyer HMS Dunkirk, with two twin mountings BD Mark IV for Mark III guns.
Dido-class cruiser
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The Dido class consisted of sixteen light cruisers built for the Royal Navy during World War II. The first group of three ships were commissioned in 1940; the second group of six ships and third group
Cleopatra lays smoke to shield a convoy as Euryalus elevates her forward 5.25 inch guns to shell the Italian fleet at the Second Battle of Sirte, 22 March 1942
The cruisers Edinburgh, Hermione, and Euryalus, steaming in line abreast whilst they escort a convoy (not visible) as part of Operation Halberd to resupply Malta
Bellona of the Bellona subclass