 Prince of Wales mounted 10 BL 14 @-@ inch ( 356 mm ) Mk VII guns . The 14 @-@ inch guns were mounted in one Mark II twin turret forward and two Mark III quadruple turrets , one forward and one aft . The guns could be elevated 40 degrees and depressed 3 degrees . Training arcs were : turret " A " , 286 degrees ; turret " B " , 270 degrees ; turret " X " , 270 degrees . Training and elevating was done by hydraulic drives , with rates of two and eight degrees per second , respectively . A full gun broadside weighed 15 @,@ 950 pounds ( 7 @,@ 230 kg ) , and a salvo could be fired every 40 seconds . The secondary armament consisted of 16 QF 5 @.@ 25 @-@ inch ( 133 mm ) Mk I guns which were mounted in eight twin mounts , weighing 81 tons each . The maximum range of the Mk I guns was 24 @,@ 070 yards ( 22 @,@ 009 @.@ 6 m ) at a 45 @-@ degree elevation , the anti @-@ aircraft ceiling was 49 @,@ 000 feet ( 14 @,@ 935 @.@ 2 m ) . The guns could be elevated to 70 degrees and depressed to 5 degrees . The normal rate of fire was ten to twelve rounds per minute , but in practice the guns could only fire seven to eight rounds per minute . Along with her main and secondary batteries , Prince of Wales carried 32 QF 2 pdr ( 1 @.@ 575 @-@ inch , 40 @.@ 0 mm ) Mk.VIII " pom @-@ pom " anti @-@ aircraft guns . She also carried 80 UP projectors , which were short range rocket firing anti @-@ aircraft weapons used extensively in the early days of the Second World War by the Royal Navy . 
