The Westland Sea King is a British naval helicopter. Development started in the late 1950s under licence of the Sikorsky S-61 helicopter. Westland initially developed the Sea King as an antisubmarine warfare helicopter (or HAS, Helicopter Anti-Submarine) for the UK Royal Navy. Sea King is also operational as a search and rescue (SAR) helicopter and as an airborne early warning (AEW) helicopter. The helicopter can carry four torpedoes: either Alliant Techsystems Mark 46, the A244S from Whitehead SpA or the Sting Ray torpedo from Marconi Electronic Systems. The helicopter can also be armed with four Mark 11 depth charges. The helicopter can carry two anti-ship missiles, either Sea Eagle or AM39 Exocet. Sea Eagle is carried by British and Indian Navy Sea Kings. The AM39 Exocet anti-ship missile by Aerospatiale is carried by the Pakistan Navy
Sea Kings. Research Sea King