Westland Sea King

WS-61 Sea King Commando
Royal Air Force Sea King HAR3
Role	Anti-submarine warfare, medium-lift transport and utility helicopter Type of aircraft
Manufacturer	Westland Helicopters
First flight	Sea King: 7 May 1969 Commando: 26 September 1979
Status	Active service
Primary users	Royal Navy (Retired) Royal Air Force (Retired) German Navy (Retired) Indian Navy
Produced	1969–1995
Number built	344 (Westland Sea King) / 13 (Westland Sea King AEW Mk.2/ASac MK.7 variant)[1]
Developed from	Sikorsky SH-3 Sea King

The Westland WS-61 Sea King is a British licence-built version of the American Sikorsky S-61 helicopter of the same name, built by Westland Helicopters. The aircraft differs considerably from the American version, with Rolls-Royce Gnome engines (derived from the US General Electric T58), British-made anti-submarine warfare systems and a fully computerised flight control system. The Sea King was primarily designed for performing anti-submarine warfare (ASW) missions. A Sea King variant known as the Commando was developed by Westland to serve as a troop transport.

In British service, the Westland Sea King provided a wide range of services in both the Royal Navy and the Royal Air Force. As well as wartime roles in the Falklands War, the Gulf War, the Bosnian War, the Iraq War and the Afghanistan War, the Sea King is perhaps most well known in its capacity as a Royal Navy Search and Rescue (red and grey livery) and RAF Search and Rescue Force (yellow livery) helicopter. The Sea King was also adapted to meet the Royal Navy's requirement for a ship-based airborne early warning platform.

On 26 September 2018, the last remaining Sea King variant in Royal Navy service was retired. Many operators have replaced, or are planning to replace, the Sea King with more modern helicopters, such as the NHIndustries NH90 and the AgustaWestland AW101. Germany retired the type in March 2024, however it is stil in widespread service around the Globe including India and several middle eastern countries.