Read: Russia-Ukraine War: Why India, Israel, and Pakistan Have Chosen SilenceIn order to ensure the security of the Black Sea littoral states, including Turkey, and the Black Sea itself, the convention limits the total tonnage of military ships that non-Black Sea littoral states can keep in the sea in peacetime to 30,000, and up to 45,000 tons under certain conditions, and to 21 days of stay (Article 18).