The Baltic Sea is emerging as a critical area of national security for NATO members, particularly concerning Russia's activities. Countries like Poland are investing in advanced stealth submarines, such as Sweden's A26, to enhance surveillance of vital underwater infrastructure, including energy pipelines and communication cables. While NATO has a strong naval presence, Russia possesses the capability to disrupt this infrastructure, with recent suspected sabotage incidents linked to its shadow fleet highlighting the escalating tensions and strategic importance of the region.