MSubs receives UK SDA trial contract for CETUS XLUUV - 2026-06-25 - Contract Award - The trial phase covers CETUS payload testing, underwater-autonomy de-risking and military-utility evaluation. XV Excalibur is the Royal Navy XLUUV developed through Project CETUS with MSubs. GOV.UK describes Excalibur as a 12 m… - source: ukdefencejournal.org.uk