Russian submarine activity increases near Portuguese waters

Reports indicate an intensification of Russian submarine activity in the maritime corridor connecting Northern Europe to the Mediterranean, passing through Portugal’s Exclusive Economic Zone (EEZ). This movement is characterized as a form of 21st-century surveillance and presence, linked to the ongoing war in Ukraine.

The region is strategically vital due to its role in protecting commercial shipping routes, undersea data cables, and energy infrastructure, including gas pipelines and offshore renewable energy sites. The activity involves discrete missions focused on acoustic measurements, bathymetric surveys, and pattern recognition of maritime traffic. Experts note that controlling the seabed is essential for influencing surface operations, as the area serves as a critical intersection for global digital and economic arteries.