Greenpeace activists in inflatable attempt to stop and enter the single hulled oil tanker the 'Byzantio' on its way from Tallinn with a cargo of 50,000 tons of oil. Activists display a banner reading, 'Hazard', Baltic Sea. The single hulled tanker is transporting oil owned by same company 'Crown Resources' that owned the oil on the 'Prestige' oil tanker that broke up on the coast of Spain.