Drones fly overhead and also glide underwater, and soldiers wear virtual reality (VR) headsets and monitor data from impressive-looking maps on screens. A nuclear submarine also sails off the waters of the Portuguese Navy Operational Experimentation Centre (CEOM) in Tróia.
This is part of a NATO-supported exercise that wrapped up this month. For three weeks, navies from 24 countries, including Ukraine, participated in the largest unmanned maritime system exercise as part of a Portugal-led military exercise, REPMUS 2025 (Robotic Experimentation and Prototyping using Maritime Unmanned Systems).