Westland Sea King and the Sikorsky SH-3 Sea King : Used principally for anti-submarine warfare ( ASW ) and search & rescue roles , the helicopter fleet operate from INS Garuda ( Kochi ) as well as INS Shikra air stations . US sanctions on India in response to India 's nuclear tests resulted in a large part of the Sea King fleet being grounded for want of spare parts . Seventeen of the Sea King helicopters will be upgraded . The upgrade will feature day and night capability , capability to work in adverse weather conditions , integration of two anti-ship missiles with a range of fifty kilometres and a new radar
nuclear tests
Pokhran-II
Indian Naval Air Arm