The Royal Navy’s Mine and Threat Exploitation Group (MTXG) has successfully launched and operated uncrewed underwater vehicles from a Japanese mine countermeasures vessel for the first time, marking a significant step in enhancing multinational naval cooperation and uncrewed warfare capabilities.
According to a Royal Navy news update, During the International Maritime Exercise (IMX) 2025, MTXG’s X-Ray Unit 1, specialists in uncrewed underwater systems, embarked on JS Bungo, a Uraga-class mine countermeasure vessel from the Japan Maritime Self-Defence Force (JMSDF). The exercise took place in the Gulf and involved detecting and classifying underwater threats using the Remus 300 submersible.
Speaking about the exercise, Lieutenant Craig Wadley, officer in charge of X-Ray Unit 1, emphasised the importance of interoperability and multinational collaboration:
“IMX 2025 has helped to continue demonstrating the collective commitment to the rules-based order within the region and has allowed X-Ray Unit 1 to work alongside the Japan Maritime Self-Defence Force to better understand our shared tactics, techniques and procedures.”
This exercise marks the first time the Royal Navy has operated its own uncrewed systems from a Japanese warship, showcasing the increasing integration of autonomous technology in mine countermeasure operations.
Beyond the technical aspect, Wadley highlighted the cultural and professional exchange between the two nations, calling the experience “a truly memorable experience and a highlight in many of our careers for sure.”
IMX is the second-largest maritime exercise in the world, involving over 30 nations and more than 5,000 personnel across the Gulf, Red Sea, Gulf of Aden, and Gulf of Oman. The 2025 iteration placed a particular emphasis on uncrewed and autonomous systems and their role in countering emerging maritime threats.
The exercise covered a wide range of scenarios, including:
- Mine countermeasures
- Diving and harbour security
- Boarding and search operations
- Counter-terrorism and smuggling
- Defence against aerial and maritime drone attacks
Captain Brian Drewett, involved in the academic and planning phase of the IMX, highlighted the significance of the Royal Navy’s role:
“Being part of the Royal Navy’s contingent during IMX has been fantastic, showcasing our joint operations expertise and exceptional individuals.”
