INS Brahmaputra (F31) was a Leopard-class frigate constructed for the Indian Navy by the Scottish shipbuilder John Brown & Company. Laid down on 20 October 1955 at Clydebank and launched on 15 March 1957, she was completed by 31 March 1958. The vessel measured 103.6 meters (339 ft 11 in) in overall length, with a beam of 12.2 meters (40 ft) and a draught of 3.6 meters (11 ft 10 in). Her displacement was approximately 2,300 long tons at normal load, increasing to 2,520 long tons under deep load conditions. Powered by eight Admiralty Standard Range 1 diesel engines delivering a combined 14,400 brake horsepower, Brahmaputra could reach a maximum speed of 25 knots. The ship's armament featured two twin 4.5-inch (113 mm) Mark 6 dual-purpose gun turrets, positioned forward and aft, complemented by a twin 40mm Bofors mount for close-in anti-aircraft defense. Additionally, she was equipped with a single Squid anti-submarine mortar, enhancing her ASW capabilities. INS Brahmaputra served prominently during key conflicts, including the Indo-Pakistani War of 1965 and 1971. During the 1965 conflict, there was an incident where the Pakistani submarine Ghazi launched a torpedo attack believed to have targeted Brahmaputra off Bombay; however, the frigate was unharmed and unaware of the attack. In the 1971 war, she participated in amphibious operations at Cox's Bazar, conducting landing support and deploying divers ahead of landings. In 1978, Brahmaputra was converted into a training ship, with her aft turrets replaced by a deckhouse housing classrooms. She remained in service until she was stricken on 30 June 1986 and subsequently scrapped later that year. Her operational history and modifications reflect her adaptability and significance within the Indian Navy during her service life.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.