Members operating ships over 400GT, trading in designated emission control areas (ECAs), including yachts, may already be aware of the emission limits introduced designed to reduce the sulphur oxide and nitrogen oxide emissions of ocean-going vessels. With effect from 1 January 2015, it is a requirement that all fuel oil used on board must have a sulphur content of no more than 0.10% m/m.
The requirements in ECAs, includes the Baltic Sea, North Sea, East and West coasts of the United States and the Caribbean Sea. These regions apply more stringent general requirements from those that apply to other waters.
These stricter rules come into effect under International Convention for the Prevention of Pollution from ships (MARPOL) Annex VI (regulations for the Prevention of Air Pollution from Ships).
For ease of reference Members are guided to the FAQ developed by the IMO, available on the IMO website