The C class was a class of 32 destroyers of the Royal Navy that were launched from 1943 to 1945. The class was built in four flotillas of 8 vessels, the "Ca", "Ch", "Co" and "Cr" groups or sub-classes, ordered as the 11th, 12th, 13th and 14th Emergency Flotillas respectively. The sub-class names are derived from the initial 2 letters of the member ships' names, although the "Ca" class were originally ordered with a heterogeneous mix of traditional destroyer names. A fifth flotilla, the "Ce" or 15th Emergency Flotilla, was planned but were cancelled in favour of the s after only the first two ships had been ordered. The pennant numbers were all altered from "R" superior to "D" superior at the close of World War II; this involved some renumbering to avoid duplications. Design They were built as part of the War Emergency Programme, based on the hull and machinery of the pre-war J class, incorporating whatever advances in armament and naval radar were available at the time. Some of the class were completed in time for wartime service. All ships used the Fuze Keeping Clock High Angle Fire Control Computer. The "Ca" flotilla were generally repeats of the preceding Z class, and as such had a main gun armament of four QF Mk IV guns on Mk V mounts, which could elevate to 55 degrees to give an anti-aircraft capability. Close-in anti-aircraft armament generally consisted of two 40mm Bofors guns in a twin stabilized Hazemayer mount, supplemented by four single 2-pounder "pom-pom" anti aircraft guns on power operated mounts. Caprice differed in having a quadruple 2-pounder "pom-pom" instead of the Hazemayer Bofors mount, while Cassandra had eight Oerlikon 20 mm cannon instead of the single pom-poms. Torpedo armament consisted of eight torpedoes in two quadruple mounts, while 70 depth charges could be carried. The succeeding "Ch", "Co" and "Cr" flotillas were fitted with the new Mk VI HA/LA Director instead of the Mk I Type K director of the Z and Ca classes, while remote power control (RPC) gunlaying equipment was fitted. The additional weight of the new fire control equipment and the powered mountings for the 4.5 inch guns meant that only one quadruple torpedo mount was fitted, and the depth charge armament was reduced to 35 depth charges. Most of the ships were fitted with a single Hazemayer Bofors mount, although some of the later ships