HMS Agamemnon, the United Kingdom’s newest nuclear-powered attack submarine, has departed the shipyard after a construction period spanning 13 years. The submarine, the sixth vessel in the Royal Navy’s Astute Class fleet, left the BAE Systems facility in Barrow-in-Furness on its maiden voyage, marking its first time navigating open waters in the Irish Sea.

The 7,400-ton, 97-metre hunter-killer submarine was initially commissioned in 2013, with the Ministry of Defence originally projecting it would join active service by 2022. However, the construction process faced significant delays, resulting in an extended build time and increased costs. The project’s overall spending has reached approximately £1.65 billion.

Following its launch from the dock system into the Walney Channel, HMS Agamemnon is scheduled to undergo a series of sea trials before formally entering operational service. Once fully commissioned, it will join the Royal Navy’s existing fleet of Astute Class submarines, which includes HMS Astute, HMS Ambush, HMS Artful, HMS Audacious, and HMS Anson.

With a complement of around 100 crew members, HMS Agamemnon is designed to perform a range of missions, including anti-submarine warfare, intelligence gathering, and strategic deterrence. It represents a significant upgrade in capabilities for the Royal Navy’s underwater fleet.

First Sea Lord General Sir Gwyn Jenkins highlighted the vessel’s importance, stating that HMS Agamemnon exemplifies advanced British engineering and the skill of Royal Navy submariners. He emphasized the submarine’s role in enhancing the United Kingdom’s defense posture, contributing to NATO’s collective security efforts, and ensuring readiness to address future security challenges.

The successful launch of HMS Agamemnon comes amid ongoing efforts by the Royal Navy to modernize and expand its undersea capabilities as part of a broader strategy to maintain maritime superiority in a complex global security environment.