sikorsky sh-3 sea king

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the sikorsky sh-3 sea king (company designation s-61) is an american twin-engined anti-submarine warfare (asw) helicopter designed and built by sikorsky aircraft. a landmark design, it was one of the first asw rotorcraft to use turboshaft engines. the sea king has its origins in efforts by the united states navy to counter the growing threat of soviet submarines during the 1950s. accordingly, the helicopter was specifically developed to deliver a capable asw platform; in particular, it combined the roles of hunter and killer, which had previously been carried out by two separate helicopters. the sea king was initially designated hss-2, which was intended to imply a level of commonality to the earlier hss-1; it was subsequently redesignated as the sh-3a during the early 1960s.