U and V-class destroyer

	HMS Undaunted in 1944
Class overview
Name	U and V class
Builders	John Brown & Company; Cammell Laird; Fairfield Shipbuilding and Engineering Company; J. Samuel White; Swan Hunter; John I. Thornycroft and Company; Vickers-Armstrongs;
Operators	Royal Navy; Royal Canadian Navy;
Preceded by	S and T class
Succeeded by	W and Z class
Built	1941–1944
In commission	1943–1982
Completed	16
Lost	1
General characteristics
Type	Destroyer
Displacement	1,777 long tons (1,806 t) standard; 2,058 long tons (2,091 t) full load;
Length	363 ft (111 m)
Beam	35 ft 8 in (10.87 m)
Draught	10 ft (3.0 m)
Propulsion	2 × Admiralty 3-drum water-tube boilers; Geared steam turbines, 40,000 shp (29,828 kW); 2 shafts;
Speed	36.75 knots (42.3 mph; 68.1 km/h)
Range	4,860 nmi (9,000 km) at 20 kn (37 km/h)
Complement	180 (225 in flotilla leader)
Armament	Original configuration :; 4 × QF 4.7-inch (120-mm) Mk IX guns in single mountings CP Mk.XXII; 2 × QF 40 mm Bofors guns in twin mount Mk.IV; 6 × QF 20 mm Oerlikon guns; 2 × twin mounts Mk.V, 2 × single mounts Mk.III; 2 × quadruple tubes for 21-inch (533 mm) torpedoes Mk.IX;

The U and V class was a class of sixteen destroyers of the Royal Navy launched in 1942–1943. They were constructed in two flotillas, each with names beginning with "U-" or "V-" (although there was a return to the pre-war practice of naming the designated flotilla leader after a famous naval figure from history to honour the lost ships Grenville and Hardy). The hull was nearly identical to the preceding ships of the S and T classes, but the U and V class ships had different bridge and armament fits. The flotillas constituted the 7th Emergency Flotilla and 8th Emergency Flotilla, built under the War Emergency Programme. These ships used the Fuze Keeping Clock HA Fire Control Computer.

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