Maritime Robotics showcases sea drone capabilities at NATO’s REPMUS 2025
Trondheim, Norway / Sesimbra, Portugal – September 2025
Maritime Robotics joined NATO’s REPMUS and Dynamic Messenger (DYMS) exercises in Portugal this year, a major arena for testing, developing, and validating uncrewed systems in defense and security.
Hosted by the Portuguese Navy, REPMUS brought together allied forces, industry, and academia to advance the integration of autonomous technologies into naval operations. For Maritime Robotics, the exercise was an opportunity to demonstrate how its sea drones (USVs) enhance safety, efficiency, and situational awareness across a wide range of missions.
Real-world missions for sea drones
During the two-week exercise, Maritime Robotics’ platforms were deployed in a range of scenarios where sea drones can outperform crewed vessels in efficiency and risk reduction:
Seabed mapping (Rapid Environmental Assessment – REA): Delivering high-resolution hydrographic data in complex waters, enabling faster navigation and mission planning while minimizing crew exposure.
Critical infrastructure monitoring: Providing persistent surveillance of subsea cables, pipelines, and offshore installations to detect anomalies and protect vital assets.
Mine countermeasures (MCM): Reducing human risk by using sea drones for mine detection and clearance support while maintaining operational tempo.
Anti-submarine warfare (CUxV/ASW): Towing acoustic arrays to track underwater threats, extending naval reach and safeguarding larger allied vessels.
ROVEX (Towed ROV test): Deploying and supporting a remotely operated vehicle (ROV) with the Otter sea drone, showcasing cost-efficient subsea inspection and intervention without large manned vessels.
During REPMUS 2025, the Otter Seadrone (USV) by Maritime Robotics deployed and supported a remotely operated vehicle (ROV).
Strengthening allied capabilities
“Uncrewed systems are no longer experimental—they are essential”, said Håvar Øie, Senior Sales Director Defence & Security at Maritime Robotics.
“Exercises like REPMUS prove how sea drones can deliver persistent surveillance, rapid response, and long-endurance missions that traditional vessels alone cannot achieve.”
For Norway and NATO, the exercise highlighted a step toward more resilient and scalable defense capabilities. For Maritime Robotics, it reinforced the company’s position as a trusted supplier of maritime autonomy, delivering technology that supports today’s missions while shaping the naval operations of tomorrow.
The Otter X Seadrone by Maritime Robotics is being deployed to support naval operations.
Our mission remains clear
Across sectors, use cases, and operations, Maritime Robotics is committed to enabling safer, smarter, and more sustainable operations at sea. REPMUS 2025 once again demonstrated that uncrewed technology is not the future—it is already redefining how we explore, monitor, and protect the ocean.
The Mariner Seadrone by maritime Robotics being prepared and deployed to support naval operations.
REPMUS
REPMUS (Robotic Experimentation and Prototyping with Maritime Uncrewed Systems) is an annual NATO-led exercise hosted by the Portuguese Navy. The exercise brings together allied navies, industry, and academia to develop, test, and evaluate uncrewed systems and emerging technologies for maritime defense and security. Its focus is on integrating autonomous platforms—surface, subsurface, and aerial—into real naval operations, enhancing interoperability and strengthening collective capabilities.