BNS Bijoy, formerly known as HMS Dumbarton Castle (P265), is a patrol vessel that has served in both the United Kingdom's Royal Navy and the Bangladesh Navy. Designed primarily for fisheries protection and oilfield patrol duties within the UK's exclusive economic zone, she measures 81.0 meters (265 feet 9 inches) in overall length, with a beam of 11.5 meters (37 feet 9 inches) and a draught of 3.42 meters (11 feet 3 inches). Her displacement is 1,350 long tons (1,372 tonnes) at standard load, increasing to 1,550 long tons (1,575 tonnes) when fully loaded. Constructed at Hall, Russell & Company's Aberdeen shipyard, she was laid down on 25 April 1980 as yard number 986, launched on 3 June 1981, and commissioned on 26 March 1982 at Rosyth. Her propulsion system comprises two Ruston 12RK 320 DM diesel engines rated at 5,460 bhp, driving two controllable pitch propellers, enabling a maximum speed of 20 knots and a range of 10,000 nautical miles at 12 knots. Her armament initially included a single Bofors 40 mm L/60 gun, later replaced by an Oerlikon 30 mm gun, supplemented by two 7.62 mm machine guns. The vessel features a large helicopter deck at the stern, capable of accommodating Sea King or Chinook helicopters, although she lacks a hangar. Her navigation and surveillance suite includes Type 1006 radar, upgraded in 1986 with Type 994 air/surface search radar, along with electronic intercept systems. Dumbarton Castle's notable service includes her deployment during the Falklands War in 1982, where she was fitted with additional communications and desalination equipment to support operations, ferrying stores and serving as a despatch vessel. She earned the battle honour "Falkland Islands 1982" for her contributions. Her long-standing association with the Falklands saw her deployed multiple times to guard the islands and conduct patrol duties. In 2001, she was converted into a command ship for mine countermeasure vessels. Sold to Bangladesh in 2010, she was renamed BNS Bijoy and recommissioned in 2011. As part of the Bangladesh Navy, she remains a significant asset, though she was damaged during the 2020 Beirut Port Explosions while serving with the United Nations Interim Force in Lebanon.

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