# REPMUS maritime robotics exercise in Portugal > Live situation record from CLSTR: https://clstr.news/situations/repmus-maritime-robotics-exercise-in-portugal > Updated: 2026-09-21T12:05:55.000Z. Sources: 11. Developments: 2. The Portuguese Navy launched the 16th edition of REPMUS (Robotic Experimentation and Prototyping with Maritime Unmanned Systems), an international exercise involving over 1,500 participants from 36 navies, 60 companies, 13 universities, and five NATO entities. Running from August 31 to September 25, 2026, the event utilizes more than 300 unmanned maritime systems across 400 square nautical miles to test technologies for warfare, surveillance, and the protection of underwater infrastructure. During the exercise, the German company Rheinmetall demonstrated modular and interconnected unmanned systems focused on maritime operations and port infrastructure protection. Their demonstration included a containerized, mobile command and control center designed to support the German Navy. This technology employs the ‘Rheinmetall Battlesuite’ to network sensors and platforms from different manufacturers into a single operational picture. ## Timeline ### 2026-09-21: Rheinmetall tests maritime unmanned systems at REPMUS 2026 Rheinmetall is demonstrating networked unmanned maritime systems and a mobile command center for the German Navy during the REPMUS 2026 exercise in Portugal. 4 sources. https://clstr.news/cluster/rheinmetall-tests-maritime-unmanned-systems-at-repmus-2026 ### 2026-08-31: Portuguese Navy launches world's largest maritime robotics exercise The Portuguese Navy has begun REPMUS, the world's largest international robotics and unmanned maritime systems exercise, involving 36 navies and 1,500 participants in Setúbal through September 25. 7 sources. https://clstr.news/cluster/portuguese-navy-launches-worlds-largest-maritime-robotics-exercise --- Cite as: REPMUS maritime robotics exercise in Portugal. CLSTR, https://clstr.news/situations/repmus-maritime-robotics-exercise-in-portugal