Ankara bills both sides for the Black Sea
Turkey received Ukraine in Istanbul and set one standard for both belligerents on attacks against civilian vessels, while its September proposal for protected corridors remains without an answer. What closes the sea to shipping is the insurance market: London widened its high-risk area to almost the whole Black Sea, and eight cargo ships were hit in three weeks.
President Recep Tayyip Erdogan received Volodymyr Zelensky in Istanbul on October 31, 2026, and said that attacks on civilian vessels in the Black Sea are unacceptable whoever carries them out and whatever the justification offered. The Turkish account of the meeting sets one standard for both belligerents and applies it to Moscow and Kyiv alike.
Turkey has something to apply it with, and Ankara says neither side has picked it up. On September 17, 2026, Turkish diplomats circulated a memorandum proposing two protected corridors for civilian shipping, and neither Russia nor Ukraine has acted on it in the six weeks since, according to the Turkish officials who described the document. The proposal sketched a lane of four to five nautical miles and left the monitoring to be agreed. The text has not been published, and no written reply from either capital has been confirmed.
The count before the memorandum
The Turkish proposal arrived after a summer in which the sea became the deadliest part of the war for third parties. Nearly 90 ships were attacked in August alone, and 22 Turkish vessels were hit in the two months to August 27, with three Turkish crew members killed, Agence France-Presse reported. The same reporting records Sergei Lavrov’s objection at the time: a moratorium would be impossible to monitor. Moscow’s position turned the Turkish plan into a question about inspectors, and the question has not been answered.
The visit itself was framed around that file. The Turkish presidency announced Zelensky’s trip for Saturday with the war and Black Sea security as the agenda of the talks. What Erdogan delivered in public was a formula that charges both sides, which is the only formulation a mediator can use when neither side admits to the attacks and both are accused of them.
The price, not the prohibition
Something else is closing the corridor, and it is not a prohibition. In September the London insurance market widened its high-risk area to almost the entire Black Sea, sparing only the territorial waters of Georgia, Bulgaria, Romania and Turkey. In the three weeks that followed, at least eight cargo ships were hit off the Romanian and Bulgarian coasts, with about 34 crew members killed or missing, according to Reuters. A source in the London market told the agency that cover still exists, that it is expensive because of the attacks, and that some insurers are pulling back while capacity for the Romanian coast has not been withdrawn.
That distinction decides how the sea is read. A corridor can be declared by a government and refused by an underwriter; a hull can be insured and still be hit. The war risk premium is the price at which the market believes the Turkish plan has failed, and it moved before any government admitted that it had.
The tonnage contradicts nothing and proves nothing. Constanta, the Romanian port that handles the grain and the oil that leave by the western shore, moved 51.55 million tonnes by the end of September, a figure described as stable against 2025. That number was compiled before the October attacks, so it measures the Black Sea as it was in the month the memorandum was circulated, and it cannot be used to argue that shipping held up afterwards.
What Ankara gets from charging both
Turkey is the only member of the North Atlantic Treaty Organization (NATO) that talks to both capitals, and it is also the one whose economy sits inside the sea it is trying to protect: Turkish-flagged hulls, Turkish crews, Turkish trade through the Bosporus. Erdogan’s formula answers a domestic bill that no other mediator carries, and it is the reason Ankara can say in the same sentence that the attacks are unacceptable and that neither side has answered its proposal.
The formula has a limit. It does not say who fires at the ships, and no source consulted by November 1, 2026 names the attacker of the eight cargo vessels hit off Romania and Bulgaria. It does not produce monitors, which is the objection Lavrov raised in September and which the Turkish memorandum left open. And it does not change the premium, which is set in London by people who read the same reports the mediators read.
Ankara has written the only proposal on the table for the Black Sea, and the market has already priced the answer.
The question the Turkish initiative leaves is who takes responsibility for a corridor that exists on paper while the hulls are insured as if it does not. Erdogan charged both belligerents on October 31 and received no reply from either; the Turkish memorandum of September 17 has no signature and no monitors; and the London market widened the area it calls high risk to the whole sea, sparing the four coastal states whose waters the fighting has not reached. Until one of the two governments accepts a mechanism it can be caught violating, the safest route through the Black Sea will keep being the one the underwriters leave out, and the price of grain will keep being set by a premium that no foreign ministry publishes.