On May 25, 2025, the Russian Navy seized a navigation buoy belonging to the Marine Systems Institute of Tallinn University of Technology and transported it to Kaliningrad. The incident occurred in Estonian maritime waters. At the time, Estonian Navy ships were not present in the area, and a Latvian ship arrived only after the buoy had been taken. The Estonian Navy commander expressed skepticism that the act was a test of response capabilities by Estonia or Latvia, suggesting instead that the Russians may have viewed the buoy, which contains a 50-centimeter diameter device, as a navigation hazard.

On May 25, 2025, the Russian Navy seized a navigation buoy belonging to the Marine Systems Institute of Tallinn University of Technology and transported it to Kaliningrad. The incident occurred in Estonian maritime waters. At the time, Estonian Navy ships were not present in the area, and a Latvian ship arrived only after the buoy had been taken. The Estonian Navy commander expressed skepticism that the act was a test of response capabilities by Estonia or Latvia, suggesting instead that the Russians may have viewed the buoy, which contains a 50-centimeter diameter device, as a navigation hazard.