Anti-submarine warfare version of the Sea King HAS.Mk 1 for the Indian Navy List of Operators of Sea King Mk.42 Years Model Org 1971- Sea King Bharatiya Nau Sena Global Distribution of Sea King Mk.42 10mk42 Construction Numbers C/N Year History wa 733 IN501 wa 734 1971 IN502 wa 735 w/o 1981 IN503 wa 736 IN504 wa 737 IN505 wa 738 w/o 1983 IN506 wa 776 w/o unknown IN507 wa 777 w/o 1986 IN508 wa 778 IN509 wa 781 IN512