Uncrewed vessel · Undersea
XV Excalibur
Royal Navy 12 m experimental extra-large uncrewed underwater vessel (XLUUV) built by MSubs under Project Cetus; in September 2026 it launched an exercise US Mk 48 heavyweight torpedo in an AUKUS trial.
by MSubs
- Milestones0
- Sources3
- Operators1
- Components—
Royal Navy 12 m experimental extra-large uncrewed underwater vessel (XLUUV) built by MSubs under Project Cetus; in September 2026 it launched an exercise US Mk 48 heavyweight torpedo in an AUKUS trial.
Timeline
No milestones recorded for XV Excalibur yet. The timeline fills in as unveilings, tests, contracts and deliveries are sourced.
Operators1
- GBUnited Kingdom
News1
Sources3
- 1.
Royal Navy · Sep 30, 2026 · Supports: System
“XV Excalibur, an Extra-Large Uncrewed Underwater Vessel or XLUUV, was adapted with a specialist management system to successfully fire and control US Navy Mk48 Mod 4 Heavyweight Torpedo”
- 2.Government recordU.S. Navy and Royal Navy Successfully Test Fire Torpedo from Unmanned Undersea Vehicle
U.S. Navy · Sep 22, 2026 · Supports: System
“from an allied uncrewed platform, the Royal Navy's XV EXCALIBUR”
- 3.Government recordRoyal Navy unveil 12 metre uncrewed submarine named after Excalibur
Royal Navy · May 15, 2025 · Supports: System, System · maturity
“The crewless craft was built by Plymouth-based MSubs, who specialise in automated submersibles.”
Each fact on this page is attached to the sources that support it. Archived copies are linked when we keep one.