HMS Relentless (H85)

Relentless As Built, December 1942
History
United Kingdom
Name	HMS Relentless
Owner	Royal Navy
Ordered	May 1941
Builder	John Brown & Company, Clydebank, Yard No.590
Laid down	20 June 1941
Launched	15 July 1942
Commissioned	30 November 1942
Out of service	Reserve Fleet - November 1947
Reinstated	1952. Converted to Type 15 frigate
Identification	Pennant number H85
Honours and awards	SABANG 1944
Fate	Scrapped 1971
General characteristics As R-class destroyer
Class and type	R-class destroyer
Displacement	1,705 tons (1,732 tonnes) 2,425 tons (2,464 tonnes) full load
Length	358.25 ft (109.19 m) o/a
Beam	35.75 ft (10.90 m)
Draught	9.5 ft (2.9 m)
Propulsion	2 x Admiralty 3-drum water-tube boilers, Parsons geared steam turbines, 40,000 shp (30,000 kW) on 2 shafts
Speed	36 kn (67 km/h)
Range	4,675 nmi (8,658 km) at 20 knots (37 km/h)
Complement	176
Sensors and processing systems	Radar Type 290 air warning Radar Type 285 ranging & bearing
Armament	4 × QF 4.7-inch (120-mm) Mk.IX guns single mounts CP Mk.XVIII 4 × QF 2 pdr Mk.VIII (40 mm L/39), quad mount Mk.VII 2 × 2, 4 × 1 QF 20 mm Oerlikon, single mount P Mk.III[1] 8 (2x4) tubes for 21-inch (530 mm) torpedoes Mk.IX 4 × throwers & 2 x racks, 70 depth charges
General characteristics As Type 15 frigate
Displacement	2,300 tons (standard) 2,700 tons (full load)
Length	358 ft (109 m) o/a
Beam	37.75 ft (11.51 m)
Draught	14.5 ft (4.4 m)
Propulsion	2 × Admiralty 3-drum boilers, steam turbines on 2 shafts, 40,000 shp
Speed	31 kn (57 km/h) (full load)
Range	4,675 nmi (8,658 km) at 20 knots (37 km/h)
Complement	174
Sensors and processing systems	Radar Type 293Q target indication. Type 277Q surface search Type 974 navigation Type 262 fire control on director CRBF Type 1010 Cossor Mark 10 IFF Sonar: Type 174 search Type 162 target classification Type 170 attack
Armament	1 × twin 4 in gun Mark 19 1 × twin 40mm Bofors Mk.5; 2 × Limbo Mark 10 A/S mortar

HMS Relentless was an R-class destroyer of the Royal Navy that saw service during World War II. She was later converted into a Type 15 fast anti-submarine frigate, with the new pennant number F185.