The International Maritime Organization (IMO), in an effort to reduce marine pollution and in order to improve air quality and environmental protection, will require the usage of marine fuels with a Sulphur not exceeding 0.5 percent. At present the current limit is 3,5 percent. This regulation applies for all sizes of ships. For more and detailed information please see in this respect the IMO website: http://www.imo.org/en/mediacentre/hottopics/sulphur-2020.aspx