Naval Gun 4 inch

Naval Gun 4 inch. . , Naval Gun 4 inch QF Mk 4 on Mk XVI Mount 1945 , Calibre 100mm (4 inch) , Range 16,300 yards , Rate of Fire 10 - 15 rounds per minute , Shell weight 31lb, 14kg , , The Naval Gun 4 inch QF first appeared in 1895 with the Mark IV being introduced in 1912 and was used on many vessels including Cruisers, Patrol Boats and Submarines during the First World War and Merchant Aircraft carriers, Minesweepers and Merchant Ships during the Second World War. Small numbers were emplaced for coastal defence during the First World War, particularly on the Humber and it also saw service as a land based anti aircraft gun. , , During the Bombardment of the Hartlepools in 1914, the coastal defences were supplemented by a coastal patrol of two light cruisers, four destroyers and a submarine. The light cruisers, HMS Patrol and Forward were each armed with nine 4 inch guns as well as two torpedo tubes but despite their best efforts, the German Ships, armed with 11 and 5.9 inch guns were able to break through and attack the towns. , , On loan from English Heritage.