UK’s Breakthrough in Naval Technology
The United Kingdom has conducted a significant test by firing a U.S. torpedo from an uncrewed undersea vessel for the first time. This event marks a major development for Euro-Atlantic security and strengthens NATO’s naval capabilities. The UK’s First Sea Lord, General Sir Gwyn Jenkins, recently emphasized the need for more warships and drones to safeguard the Atlantic, citing Russia as the greatest threat to security. He highlighted Russia’s advanced submarines and long-range weapons, which are increasingly difficult to track.
Details of the Test
The UK Ministry of Defence (MOD) announced the successful launch of a heavyweight torpedo from the British-made 40-foot undersea drone, XV Excalibur. This achievement represents the first instance of launching a torpedo from an uncrewed undersea vessel by either the UK or the US. It underscores the technological collaboration within the AUKUS alliance, consisting of the US, UK, and Australia. The MOD is working on creating innovative attack submarines and autonomous undersea capabilities to deter future adversaries.
About the XV Excalibur
Though specific details of the trial’s location and date remain undisclosed, UK Minister of State for Defence Luke Pollard mentioned it occurred off the north coast of Scotland. Reports suggest the trial may have taken place at the British Underwater Test and Evaluation Centre (BUTEC). Pollard indicated the test is vital in developing a hybrid navy that combines crewed and uncrewed vessels, enhancing security in the North Atlantic.
The XV Excalibur is classified as an Extra-Large Uncrewed Underwater Vehicle (XLUUV), developed by Plymouth-based MSubs and the UK’s Submarine Delivery Agency. As the largest uncrewed underwater vessel trialed by the Royal Navy, Excalibur underwent three years of development before being unveiled in 2025. A joint UK and Australia trial occurred under Exercise Talisman Sabre, demonstrating uncrewed systems’ potential for interoperability between the UK and Australia.
Technological Features and Projections
The Excalibur does not possess torpedo tubes but features a large central payload bay with doors on top and bottom.
Reports indicate the Mk 48 torpedo was too long for standard payload storage, suggesting it may have been released from an external cradle during the trial. Luke Pollard remarked that deploying torpedoes from uncrewed systems, alongside Astute-class submarines, significantly boosts naval lethality.
Understanding AUKUS
The MOD regards the Excalibur trials as a breakthrough for Euro-Atlantic security and NATO’s underwater strengths. These trials reflect cooperative efforts within AUKUS, a defense and security collaboration among Australia, the UK, and the US. Launched on 15 September 2021, AUKUS addresses the perceived threats posed by China in the Indo-Pacific region. The partnership comprises two pillars: Australia’s acquisition and deployment of nuclear-powered submarines, and collaborative work on advanced technology like undersea capabilities, AI, and electronic warfare. AUKUS has recently introduced a project focusing on developing payloads and systems for uncrewed underwater vehicles.