Sikorsky SH-3 Sea King (other designation: Sikorsky S-61) is an American multi-role naval helicopter of the Cold War and modern times. The flight of the prototype took place in 1959, and the machine entered service in 1961. The length of the helicopter - in the SH-3 version - is 16.7 m, and the diameter of the main rotor is 19 meters. The drive is provided by two General Electric T58-GE-10 engines with a capacity of 1400 hp. each one Its maximum speed reaches 267 km/h. The helicopter has a classic layout with a single propeller and a propeller on the tail beam. The Sikorsky SH-3 Sea King was developed for the needs of the US Navy, primarily as an on-board ZOP (anti-submarine) helicopter capable of landing on water. Subsequently, the range of performed tasks expanded, including, in particular, tasks of rescue at sea or combating naval units. When building the machine, great attention was paid to its reliability and ability to fly as long as possible. During production, many experimental versions of this successful helicopter were created, including: SH-3A (the first, actually serial version of the machine for the US Navy), CH-3B (transport version for the US Air Force), HH-3E Jolly Green Giant (rescue - search helicopter) or UH-3H (transport version for the US Navy). It is also worth adding that the licensed production of this helicopter was carried out in Great Britain, where it was manufactured as the Westland Sea King. It flew in 1969 and differed from its American predecessor mainly in the use of Rolls-Royce Gnome engines. It also uses significantly modified avionics and other equipment for ZOP operations.