Wärtsilä’s solutions are customized to specific ship design and operational requirements to ensure maximum efficiency, reliability and environmental performance over the entire lifecycle of the installation. Examples of Wärtsilä’s achievements in environmental care are RT-flex engines, dual-fuel engines for LNG carriers and environmentally friendly stern tube sealing systems.

IMO NOX EMISSIONS AND WÄRTSILÄ ENGINES

Annex VI of the MARPOL 73/78 convention entered into force on 19 May 2005. All Wärtsilä engines included in this booklet comply with the NOX limits specified in the Annex.

The exhaust emissions regulations in Annex VI of the MARPOL 73/78 convention are now referred to as IMO Tier I. In October 2008, the Marine Environment Protection Committee (MEPC) of IMO adopted amendments to the MARPOL Annex VI regulations. These specify further NOX emission limits to be known as IMO Tier II and Tier III. Under IMO Tier II, the NOX emission limits for engines installed in ships constructed on or after 1 January 2011 will be reduced, according to a speed-dependent function, about 20% from the presently valid IMO Tier I levels.

Under IMO Tier III, the NOX emission limit for engines installed in ships constructed on or after 1 January 2016 will be reduced, according to a speeddependent function, 80% from the presently valid IMO Tier I levels,when the ship is operating in a designated Emission Control Area. Outside designated Emission Control Areas Tier II limits apply.

Wärtsilä will adapt its engines to comply with the new upcoming NOX emission regulations.