Type 15 frigate

HMS Relentless after her Type 15 conversion
Class overview
Name	Type 15
Operators	Royal Navy South African Navy Royal Australian Navy Royal Canadian Navy
In service	1951–1977
Completed	23
Retired	23
General characteristics
Type	Frigate
Displacement	2,300 long tons (2,337 t) standard 2,700 long tons (2,743 t) full load
Length	358 ft (109 m) o/a
Beam	37 ft 9 in (11.51 m)
Draught	14 ft 6 in (4.42 m)
Propulsion	2 × Admiralty 3-drum boilers Steam turbines on 2 shafts 40,000 shp (30 MW)
Speed	31 knots (57 km/h; 36 mph) (full load)
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 (102 mm) Mark 19 gun 1 × twin 40mm Bofors Mk.5 2 × Squid or Limbo Mark 10 anti-submarine mortars
Aviation facilities	Flight deck on Grenville and Undaunted

The Type 15 frigate was a class of British anti-submarine frigates of the Royal Navy. They were conversions based on the hulls of World War II-era destroyers built to the standard War Emergency Programme "utility" design.