The QF 4 inch Mk XVI gun was the standard British Empire naval anti-aircraft and dual-purpose gun of World War II.
Twin Mk XVI on HMCS Haida
Crew of a dual 4-inch at action stations aboard HMS Berwick while in screening the Atlantic Convoys in May 1943.
Twin guns of HMAS Swan bombarding shore positions in New Guinea, February 1945
Single Mk XX mounting on HMAS Barcoo, 1945
HMS Hood was a battlecruiser of the Royal Navy. Hood was the first of the planned four Admiral-class battlecruisers to be built during the First World War. She was already under construction when the
QF 4-inch naval gun Mk XVI
…Battlecruisers: HMS Hood Heavy cruisers…
A close-up of Hood's aft 15-inch guns in 1926, rotated to the extreme arc of their travel, covering the port bow quarter; firing in this position could cause blast damage to the deck and superstructure
An aerial view of Hood in 1924: The two forward gun turrets are visible with their prominent rangefinders projecting from the rear of the turret. Behind the turret is the conning tower surmounted by the main fire-control director with its own rangefinder. The secondary director is mounted on the roof of the spotting top on the tripod foremast.
Hood after she was fitted with an aircraft catapult; a Fairey III is visible on her stern, 1932