US Mk 48 torpedo launched from Royal Navy unmanned sub in historic AUKUS test
On September 13, 2026, the U.S. and U.K. successfully test-launched a U.S. Mk 48 Heavyweight Torpedo from the Royal Navy's experimental extra-large unmanned underwater vehicle (XLUUV) XV Excalibur at the British Underwater Test & Evaluation Centre in Scotland. The trial, conducted under AUKUS Pillar 2, validated the mechanical, electrical, and software integration of a U.S. kinetic payload onto an allied autonomous vessel, marking a historic first for allied undersea warfare.
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