The S and T class was a class of sixteen destroyers of the Royal Navy launched in 1942–1943. They were built as two flotillas, known as the 5th and 6th Emergency Flotilla, and they served as fleet and convoy escorts in World War II.
HMS Terpsichore in 1945
QF 4.7-inch Mk IX & XII naval gun
The 4.7 inch QF Mark IX and Mark XII were 45-calibre, 4.7-inch (120 mm) naval guns which armed the majority of Royal Navy and Commonwealth destroyers in World War II, and were exported to many countries after World War II as the destroyers they were mounted on were sold off.
Two twins 4.7 inch Mk XII guns on CP Mk XIX mounting on HMS Kelvin
Single Mk IX gun on HMCS Assiniboine with gunners sheltering behind the shield
Twin Mk XII guns on HMAS Nizam
A twin Mk.XII mounting on HMS Javelin. The cylindrical Fuse Setting Pedestal is clearly visible on the right, at waist height.