United Kingdom, Oct. 14 -- The Royal Navy crew achieved the major milestone as part of HMS Agamemnon's 'trim dive', a three-day period of testing in the town's Devonshire Dock to prove the 7,400-tonne, 97-metre-long attack vessel's stability and safety. The process, which comes shortly after King Charles III officially commissioned the Astute class submarine into the Royal Navy, is a key moment in the lead up to its departure from Barrow to join her sister boats in the fleet, based at His Majesty's Naval Base, Clyde. Alongside the build of seven Astute class submarines - of which HMS Agamemnon is the sixth - BAE Systems is also constructing four Dreadnought class boats in partnership with the wider Defence Nuclear Enterprise.The Dreadnought...