 In 1982 , India signed a contract to purchase several Mk42B Sea Kings , an upgraded variant to perform dual @-@ purpose : anti @-@ shipping and anti @-@ submarine missions , following a competition for the order against the Aérospatiale Super Puma . These helicopters would operate from the Godavari @-@ class frigates as well as replace the existing Sea Kings . A team of Indian engineers was sent to Britain to help develop the Mk42B 's avionics , especially the onboard software . Changes from the older Sea Kings included a brand new avionics suite , the use of composite materials throughout the fuselage and in the rotor blades , as well as the integration of the Sea Eagle missile , which had been procured from Britain in 1983 . Between 1988 and 1992 , a total of 20 Mk42B Sea Kings were delivered to the Indian Navy . 
