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 &; awards	SABANG 1944
Fate	Scrapped 1971
General characteristics As R-class destroyer
Class & 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 &; 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; 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 &; 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.

History
Relentless As Built, December 1942
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 & awards	SABANG 1944
Fate	Scrapped 1971
General characteristics As R-class destroyer
Class & 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 & 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 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 & 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