Russia built a bridge across the Kerch Strait on its own authority. It stops and harasses the vessels in the Black Sea, the Sea of Azov and the Kerch Strait.
Russia's War Against Ukraine
Ukrinform: Russia stops 150 vessels on their way to Ukrainian ports
This video grab taken from footage of local media Kerch Info on Nov. 25, 2018 shows Russian aircraft flying over the Crimean Bridge that spans the Kerch Strait, a narrow strip that links the Azov and Black seas, after Russia fired on and then seized three Ukrainian ships on Nov. 25, 2018, accusing them of illegally entering its waters in the Sea of Azov.