Leander-class frigate

HMS Apollo, 1976
Class overview
Name	Leander class
Operators	Royal Navy  Indian Navy  Royal New Zealand Navy  Chilean Navy  Royal Netherlands Navy  Pakistan Navy  Ecuadorian Navy  Indonesian Navy
Preceded by	Rothesay class Salisbury class Leopard class Tribal class
Succeeded by	Type 21 frigate
Subclasses	Condell class River class Nilgiri class Van Speijk class
Built	1959–1973
In commission	1963–1993 (Royal Navy)
Completed	26
Retired	26 (3 as artificial reefs, 2 as targets)
General characteristics
Type	Frigate
Displacement	2,350 tons standard, broad-beam 2,500 tons (later 2,790 tons) standard 2,860 tons full load, broad-beam 2,962 tons (later 3,300 tons) full load
Length	113.4 metres (372 ft)
Beam	12.5 metres (41 ft), broad-beamed 13.1 metres (43 ft)
Draught	4.5 metres (15 ft) normal, 5.5 metres (18 ft) deep, broad-beamed 5.5 metres (18 ft) (later 5.8 metres (19 ft)) deep
Propulsion	2 Babcock & Wilcox oil-fired boilers, geared steam turbines, 22,370 kilowatts (30,000 hp), 2 shafts
Speed	27 knots (50 km/h; 31 mph)
Range	7,400 kilometres (4,600 mi; 4,000 nmi) at 15 knots (28 km/h; 17 mph)
Complement	260
Sensors and processing systems	Radar: Type 965 (air warning radar removed during the Ikara conversion), Type 992 Q, Type 903, Type 974/978 Sonar: Type 162, 184, 199, & later Type 2031 and Type 2016 sonar 𝘊𝘰𝘮𝘣𝘢𝘵 𝘪𝘯𝘧𝘰𝘳𝘮𝘢𝘵𝘪𝘰𝘯 𝘴𝘺𝘴𝘵𝘦𝘮: ADAWS-5 (Action Data Automated Weapon System) for Batch 1 - Ikara
Electronic warfare & decoys	ESM system with UAA-8/9 warning and Type 668/669 jamming elements.
Armament	Initial: 2 × 4.5-inch guns (1 × twin mounting Mk6) 1 × Seacat surface-to-air missile launcher 2 × 20mm guns (single mountings) 2 × 40mm Mk VII Bofors (single mountings) initially in first 7 instead of Seacat & 20mm guns 1 × ASW Limbo mortar Batch 1 – Ikara: 1 × Ikara Anti-submarine missile Launcher 2 × Seacat surface-to-air missile launchers 2 × 40mm guns – single mountings 2 × triple 324 mm (12.75) STWS-1 tubes for Mk 46 and Stingray ASW torpedoes 1 × Limbo ASW Mortar Batch 2 – Exocet/Seacat: 4 × MM.38 Exocet anti-ship missile launchers 3 × Seacat surface-to-air missile launchers 2 × 40mm guns – single mountings 2 × triple 324 mm (12.75 inch) STWS-1 tubes for Mk 46 and Stingray ASW torpedoes Batch 3 – Exocet/Seawolf: 4 × MM.38 Exocet anti-ship missile launchers 1 × sextuple GWS.25 launcher with 30 Sea Wolf SAMs 2 × 20mm AA guns 2 × triple 324 mm (12.75) STWS-1 tubes for Mk 46 and Stingray ASW torpedoes
Aircraft carried	Initial and Batch 1: 1 × Westland Wasp ASW helicopter Batch 2 and Batch 3: 1 × Westland Lynx HAS.Mk 2 ASW helicopter

The Leander-class, or Type 12I (Improved) frigates,^[1][2][3] comprising twenty-six vessels, was among the most numerous and long-lived classes of frigate in the Royal Navy's modern history. The class was built in three batches between 1959 and 1973. It had an unusually high public profile, due to the popular BBC television drama series Warship. The Leander silhouette became synonymous with the Royal Navy through the 1960s until the 1980s.

The Leander design or derivatives of it were built for other navies:

• Royal New Zealand Navy as the Leander class
• Chilean Navy: Condell class
• Royal Australian Navy: River class
• Indian Navy: Nilgiri class
• Royal Netherlands Navy: Van Speijk class