Two commercial vessels managed by Turkish-based companies were struck by drones approximately 80 nautical miles east of the Bulgarian coastal town of Byala early Tuesday morning. One ship caught fire; the other sank. Eighteen Turkish and Indian crew members were rescued from the burning vessel. The crew of the sunken ship — reportedly 10 people according to Maritime.bg — are all presumed dead after Bulgarian authorities ended search operations late Tuesday with no survivors found. The wreckage tells its own story. Search teams recovered one overturned boat, three life rafts, and floating debris from the ship's equipment. No drone debris has been recovered, and Bulgarian authorities say they cannot yet determine the origin of the attack. The distress beacon from the sunken ship was received at 2:54am local time; the second ship's signal came 29 minutes later at 3:23am. Both strikes occurred outside Bulgaria's territorial waters but within its designated search and rescue zone. This is the second consecutive day of lethal Black Sea shipping attacks. On Monday, another ship caught fire and sank off the Romanian coast, killing two people. Ukraine blamed Russia for that strike. The pattern is unmistakable: commercial shipping lanes in the western Black Sea are now under systematic drone attack as the Russia-Ukraine war intensifies. Bulgarian Prime Minister Rumen Radev called the attack "absolutely unacceptable." EU chief Ursula von der Leyen condemned it. These statements carry approximately zero deterrent value. Neither Bulgaria nor the EU has maritime enforcement capability in the relevant area, and the attacks occurred in international waters where sovereignty claims are ambiguous and enforcement is effectively nonexistent. The structural problem is straightforward. The Black Sea is a chokepoint for grain, fuel, and commercial cargo connecting Turkey, Ukraine, Romania, Bulgaria, and Georgia. Drone warfare has made the western Black Sea functionally equivalent to a contested naval theater, but the ships transiting it are undefended commercial vessels crewed by Turkish and Indian nationals — people with no stake in the underlying conflict who are absorbing 100% of the physical risk. No party has claimed responsibility for Tuesday's strikes. The attribution vacuum is itself a weapon: it prevents diplomatic escalation, blocks insurance claims, and paralyzes the response. Bulgaria cannot retaliate against an attacker it cannot name. The EU cannot sanction a party it cannot identify. Meanwhile, shipping companies face a binary choice — accept the risk or reroute at enormous cost — and the crews have no choice at all. If this pattern continues, the Black Sea will effectively close to unescorted commercial traffic, with cascading effects on grain exports, energy shipments, and the regional economies that depend on maritime trade. The cost will be borne by the weakest actors in the chain: merchant sailors, small shipping firms, and food-importing nations downstream.