Russia struck five more merchant vessels on Tuesday — three in the port of Reni, two en route to Odesa — extending a campaign that has turned Black Sea grain shipping into the most dangerous commercial maritime activity on Earth. NATO ambassadors convened the North Atlantic Council the same day and announced additional surveillance, reconnaissance, and forensics assets for the region, including maritime patrol aircraft, radar systems, drones, and intelligence personnel. The escalation is no longer contained to Ukraine's territorial waters. Romania has recorded 35 unauthorised drone incursions this year versus nine in all of 2025, and shot down six drones — including, for the first time, what Defence Minister Radu Miruță identified as Geran-4 turboprop drones flying at 450 km/h. Two chemical tankers were hit near Romania's coast last week while anchored near the Sulina canal, the Danube-to-Black-Sea export corridor. At least five other cargo ships have been struck near the coasts of Romania and Bulgaria in two weeks, with 23 sailors dead or missing. The insurance market has already priced in the new reality. The London shipping insurance market has designated almost the entire Black Sea as high-risk, exempting only the territorial waters of Romania, Bulgaria, and Turkey. Maritime insurer Ambrey reports a sharp increase in attack tempo beginning in July, with Russian forces estimated responsible for 80% of strikes. Insurance premiums have rocketed accordingly. Russia's tactical innovation is the "double tap" — combining aerial drones with surface drones carrying up to half a tonne of explosives. Smaller vessels using the Danube canal system have sunk rapidly under this combination. The lethality is deliberate: this is economic warfare targeting Ukraine's agricultural export revenue while imposing costs on every nation whose ships transit the corridor. Bulgaria has formally requested NATO combat aircraft and anti-drone systems. France deployed a maritime reconnaissance aircraft to Romania on 18 October. NATO's response so far is explicitly defensive — surveillance, reconnaissance, forensics — not combat interdiction. The gap between what's being deployed and what would actually stop the attacks is the central tension. The strategic logic is straightforward. Russia is testing how far it can push into NATO-adjacent waters before triggering a kinetic response. Every merchant vessel hit near Romanian or Bulgarian coasts without consequence moves the line. The 23 dead sailors are predominantly from non-NATO-flag vessels, creating a political buffer — these are not NATO nationals, which dampens the Article 5 pressure. Ambrey's Tomas Alexa stated plainly there is no end in sight. The geographical scope and tempo of attacks are both expanding. What began as interference with Ukrainian grain exports is now a broader campaign to establish de facto Russian control over Black Sea shipping lanes — a slow-motion blockade enforced not by warships but by expendable drones.
