Monday 10 December 2012 £1.2bn contract for Audacious submarine &file=" /> Astute Boat 4 bridge fin shipping   The UK Ministry of Defence has awarded us a contract worth £1.2bn for Audacious, the fourth submarine in the Astute class.   The full contract covers the design, build, test and commissioning programme. First steel was cut in 2007 and Audacious is at an advanced stage of construction at BAE Systems’ site in Barrow-in-Furness, Cumbria. BAE Systems Maritime – Submarines Managing Director John Hudson said: “This is a very significant milestone for the company as it provides increased stability for the remainder of the programme.“More than 5,000 people are employed at Submarines with over half of these directly involved in the Astute programme, many in highly skilled, specialist positions, so today’s announcement is hugely welcomed. “The Astute class will deliver to the Royal Navy a fantastic attack submarine capability and both HMS Astute and Ambush are currently demonstrating this while on their sea trials. Audacious, and the rest of the submarines in the Astute class, will eventually complement those already at sea.” The MoD also confirmed today that a further £1.5bn has been committed to the Astute programme for the remaining three submarines in the class, which includes early build work on boat 5, Anson, whose keel was laid in October, 2011. Audacious will include a number of design changes to the first three submarines in the Astute class. Most relate to the submarine’s combat system – primarily its command, navigation and sonar systems. For the first time on a Royal Navy submarine this will use a shared computer environment for the different systems, common consoles and cabinets, and “commercial off-the-shelf” hard and software. They will make the system more cost effective and easier to maintain and update.These changes are due to be implemented on the remaining submarines in the class, and have been back-fitted to Boat 3, Artful. The eventual aim is to back-fit the “Common Combat System” to HMS Astute and Ambush, and progressively to the rest of the Royal Navy submarine fleet.Audacious, the fourth of a planned class of seven submarines, is nearly half way through its build programme with all of its pressure hull units now assembled in our main construction hall, awaiting full combination. The 97m-long Astute class submarines boast a range of world class capabilities. Powered by a sophisticated nuclear propulsion system, the reactor never needs refuelling. The sonar system has the processing power of 2,000 laptops and can track ships 3,000 miles away. Armed with both Tomahawk land attack missiles and Spearfish torpedoes, its missiles have a target range of 1,200 miles with accuracy measured in metres.