Bulgaria Seeks NATO Anti-Drone Systems as Black Sea Attacks Test the Eastern Flank
Bulgaria seeks NATO anti-drone systems after drones hit several commercial ships off its Black Sea coast this month. One vessel sank, and eleven sailors are still missing. The attacks have put the country at the centre of worries about the Eastern Flank, the line of NATO members closest to the war in Ukraine. Sofia wants better radar, quicker detection and shared counter-drone defences before another strike happens.
Why Drones Have Become a Black Sea Problem
On October 6, drones struck two cargo ships inside Bulgaria’s economic zone. A week later, two more vessels were hit, and the HS Dignity went down. Bulgaria summoned the Russian ambassador, who said she had no information about the attacks and suggested a third party could be responsible. Sofia has stopped short of blaming Moscow directly, though Prime Minister Rumen Radev said the outcome benefits Russia.
The location explains much of the risk. Russia has bombed Ukraine’s own ports, so Ukrainian cargo now relies on Danube routes and coastal lanes near Bulgaria and Romania. That places busy trade beside NATO territory. The recent Black Sea drone attacks show how a regional war can reach ships that have no part in it. They also show how cheap flying machines can threaten the shipping that carries grain and fuel to the wider world. Bulgaria, Romania and Turkey have all raised the issue, and NATO is now weighing extra counter-drone capability for the region.
What Bulgaria Wants From NATO and Europe
Defence Minister Dimitar Stoyanov says Bulgaria expects to join a NATO project against low-altitude threats by October 30. Membership costs about 220,000 euros a year, which he says the country can manage. Radev also spoke with NATO chief Mark Rutte on October 15.
At home, Bulgaria has received two systems from the American company Axon and hopes to buy around 20 more, worth 80 million euros, through the EU’s SAFE loan scheme. Experts warn that a handful of units cannot guard a long coastline. They say real protection needs layers of radar, sensors and command centres that share information.
Rules also slow things down. Attacks on civilian ships in an economic zone do not automatically trigger NATO’s Article 5 collective defence clause. Turkey controls access to the Black Sea under the Montreux Convention, which limits warships from outside the region. Bulgaria has offered to host operator training in 2027, which would help turn new equipment into real skills.
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