8,100-ton nuclear submarine dives for first time, proves stability

The HMS Agamemnon, an 8,100-ton Astute-class nuclear submarine, recently completed its first dive near BAE Systems’ facility in Barrow, Cumbria, marking a significant milestone in its commissioning for the Royal Navy. This three-day "trim dive" tested the submarine’s stability, water-tight integrity, and various onboard systems, including ballast tanks essential for surfacing. The trials were conducted by BAE Systems and the submarine’s crew, with oversight from the UK Ministry of Defence and naval architects. The process involved precise measurements of the submarine’s center of gravity using traditional and modern methods, ensuring the vessel’s operational safety and performance. HMS Agamemnon is the sixth of seven Astute-class submarines being built by BAE Systems, which is also constructing four Dreadnought-class submarines intended to replace the Vanguard-class boats that currently provide the Royal Navy’s Continuous At Sea Deterrent (CASD). The Dreadnought vessels are expected to