A Russian liquefied natural gas (LNG) tanker has been equipped with fixed long-range firearms to protect against potential drone attacks or boarding attempts, underscoring rising tensions in the Baltic Sea region. Photographs taken in May show the Marshal Vasilevskiy, one of Russia’s primary LNG carriers supplying the Kaliningrad exclave, fitted with two mounted weapons on its bridge resembling long-range sniper rifles.

The Marshal Vasilevskiy plays a crucial role in supplying Kaliningrad, alongside a pipeline running through Lithuania. The decision to arm the vessel comes amid concerns over the security of Russian energy shipments, particularly after the destruction of a similar tanker, the Arctic Metagaz, in the Mediterranean Sea in March. That ship was reportedly struck by naval drones launched from Libya, an attack believed linked to Ukraine, though Kyiv has not claimed responsibility.

The weapons mounted on the Marshal Vasilevskiy appear intended as a deterrent. Patrick Bolder, a defense analyst at The Hague Centre for Strategic Studies, described the armament as a clear signal to NATO, warning that any attempt to board the ship could escalate into armed conflict. He noted the rifles are fixed on tripods and have an estimated range of roughly one kilometer, likely to be used against surface threats.

An intelligence official, speaking anonymously, suggested the arming of Russian vessels such as the Marshal Vasilevskiy might alter the risk calculations for European powers considering boarding operations. The official emphasized that the presence of heavy weaponry would dramatically reduce the likelihood of any helicopter or naval boarding attempts, especially targeting what has been described as Russia’s “shadow fleet” — vessels operating under flags other than Russia's to obscure their origins.

Further security measures appear embedded in the tanker’s staffing. Crew rosters obtained by the investigative group Dossier Center reveal that since August 2025, the Marshal Vasilevskiy has consistently carried individuals with military backgrounds, including personnel affiliated with the Russian Armed Forces, National Guard, and Federal Security Service.

The move to arm LNG tankers illustrates the heightened strategic importance of Russian energy exports amid ongoing geopolitical tensions. Sebastian Rötters, a sanctions campaigner at Urgewald, expressed concern over the development, calling it "shocking, yet sadly not surprising," and highlighting prior reports of secret service agents boarding such vessels. He underscored the critical role LNG plays in Russia's wartime economy.

The arming of commercial tankers marks a notable escalation in maritime security measures in the Baltic Sea, reflecting the delicate balance of energy security and military posturing in the region.