The HMS Agamemnon, the Royal Navy’s next-generation nuclear attack submarine, has successfully completed its initial submersion tests (trim dive), marking a significant milestone in its commissioning process.
The trials were conducted by BAE Systems at the Devonshire Dock facility in Barrow-in-Furness. During the three-day testing period, the submarine’s stability, buoyancy, and safety systems were evaluated. The company reported that the results were “above expectations” and emphasized that these tests represent a critical phase in achieving full operational capability.
Sixth Member of the Astute Class
HMS Agamemnon is the sixth vessel in the United Kingdom’s Astute-class nuclear submarine program. Displacing approximately 7,400 tons and measuring 97 meters in length, the submarine is equipped with Tomahawk cruise missiles and Spearfish heavy torpedoes, providing effective strike capability against both underwater and surface targets.
Astute-class submarines form the backbone of the Royal Navy’s undersea force, thanks to advanced stealth technology, long patrol range, and high sensor capabilities.
Next Stage in Operational Progress
Launched on 22 September 2025, HMS Agamemnon will now enter the sea trials phase following the submersion tests. BAE Systems has announced that, after final inspections, the submarine is expected to join the Royal Navy fleet in 2026.
Company officials noted that the tests confirmed both the design and production quality of the vessel, stating:
“The trim dive of HMS Agamemnon proved that the submarine operates safely and steadily. This achievement represents an important step forward in enhancing the Royal Navy’s operational capabilities.”
