Westland WS-61 Sea King adalah helikopter Inggris versi lisensi dari Sikorsky S-61 Amerika dari nama yang sama, dibangun oleh Westland Helicopters. Pesawat ini berbeda jauh dari versi Amerika, dengan mesin Rolls-Royce Gnome (versi lisensi dari General Electric T58s) buatan Inggris, sistem perang anti-kapal selam dan sistem kontrol penerbangan sepenuhnya terkomputerisasi. Sea King terutama dirancang untuk melakukan misi anti-kapal selam (ASW). Varian Sea King juga diadaptasi oleh Westland sebagai transportasi pasukan yang dikenal sebagai Commando.
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