Facts

• Company: MSubs
• Product type: Auv
• Status: commercial
• Capability focus: Extra Large Uncrewed Underwater Vehicle
• Website: https://msubs.com/

Profile sections

• Summary
• Overview
• Market context
• Audience
• Workflow
• Capability
• Deployment environment
• Positioning tags
• Specifications
• Timeline / Research
• Sources

Summary

XV Excalibur is the Royal Navy extra-large uncrewed underwater vehicle developed through Project CETUS with MSubs. The 12 m, 19 tonne XLUUV is being used as a large autonomous-underwater-platform testbed for sea trials, payload testing and military-utility evaluation.

Overview

XV Excalibur is the Royal Navy extra-large uncrewed underwater vehicle developed through Project CETUS with MSubs. The 12 m, 19 tonne XLUUV is being used as a large autonomous-underwater-platform testbed for sea trials, payload testing and military-utility evaluation.

Market context

XV Excalibur is the Royal Navy extra-large uncrewed underwater vehicle developed through Project CETUS with MSubs. The 12 m, 19 tonne XLUUV is being used as a large autonomous-underwater-platform testbed for sea trials, payload testing and military-utility evaluation.

Audience

Navies

Workflow

Extra-large uncrewed underwater vehicle

Capability

Extra-large uncrewed underwater vehicle

Deployment environment

XV Excalibur / CETUS operating environments

Positioning tags

• Audience: Navies
• Workflow: Extra-large uncrewed underwater vehicle
• Capability: Extra-large uncrewed underwater vehicle
• Deployment environment: XV Excalibur / CETUS operating environments

Specifications

• Classification: Extra-large uncrewed underwater vehicle (XLUUV)
• Length: 12 m
• Displacement: 19 tonnes
• Programme: Project CETUS / XV Excalibur
• Trial Contract: GBP 6.68M trial and evaluation phase through 1 May 2028

Timeline / Research

• 2026-06-25 - Contract Award - MSubs receives UK SDA trial contract for CETUS XLUUV - The trial phase covers CETUS payload testing, underwater-autonomy de-risking and military-utility evaluation.