Though those alleged actions by Russia aren’t new, other, perhaps more troubling, ones are. Klymenko, the analyst, said Russia has started issuing navigation warnings to close sectors nearer to the shore, sometimes just three miles away, “where you don’t need binoculars” to scout the location, Klymenko said. Russia has declared three such areas, near the Ukrainian ports of Mariupol, Berdyansk and Kherson, closed from Dec. 8 to Jan. 8, Klymenko said.