Sea King and Kamov Ka-25 reveal different ASW force designs

Both helicopters carried four-person ASW crews, but their size reflected different operational assumptions. The compact Ka-25 conserved hangar space and added another layer to Soviet ships, land-based aircraft, and helicopters. Westland could justify British engines, electronics, and other changes to the Sikorsky design because the smaller production run rewarded capabilities that would not necessarily make sense across a much larger American order. Britain accepted the larger Sea King's footprint because Royal Navy groups expected little outside ASW support in the North Atlantic, making each embarked helicopter's independent sensor and weapon capacity more important. The smaller Lynx was available, but the Sea King's ASW systems offered greater capability at the time. Outside submarine-hunting support was expected to be stretched thin by Soviet submarines and defence of the GIUK gap. The Ka-25 also had some provision for landing on water; a Sea King's boat-shaped underside did not make water landings advisable.