Russia halted participation on Monday in the year-old U.N.-brokered deal which lets Ukraine export grain through the Black Sea, just hours after a blast knocked out Russia's bridge to Crimea in what Moscow called a strike by Ukrainian sea drones.
Turkey has agreed to guarantee the safety of ships with Ukrainian grain that will go through the “grain corridor” in the event that the Russian Federation withdraws from the agreement.
https://en.usm.media/the-turkish-navy-will-accompany-the-vessels-of-the-grain-agreement-in-the-event-of-russias-withdrawal/
Turkey has agreed to guarantee the safety of ships with Ukrainian grain that will go through the “grain corridor” in the event that the Russian Federation withdraws from the agreement.
Good, so this scenario was already planned for