This article has also been published in the Society of Twentieth Century Wargamers Journal.
On December 9th, 1971, the Indian frigate INS Khukri was sunk by the Pakistani submarine PNS Hangor. To date, the Khukri is the only Indian warship to have been lost in action. It was built in the UK, and was basically a British Type 14 (Blackwood) frigate modified to suit Indian requirements. At the time it was sunk, the Khukri had an extra device fitted to its 170/174 sonar, which was intended to improve the detection range. Commissioned in December 1969, the Hangor was a French Daphne class submarine, well equipped with modern sensors and weapons.