Used principally for anti-submarine warfare (ASW) and search & rescue roles,the helicopter fleet operate from INS Garuda (Kochi) as well as INS Kunjali-II (Mumbai) 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.