Ship&Offshore | Issue 04/2010
IMO TIER 3: Strategies and challenges
EMISSIONS The reduction of the permissible sulphur concentrations coming into force in emission protected areas (ECAs) in 2015 will immediately be followed by the introduction of IMO Tier 3 emission stage in 2016. This stage requires a reduction of the NOx limit by 80% compared with the present level (IMO Tier 1). A number of different engine plant approaches are being studied with a view to complying with the future IMO Tier 3 NOx-limits and with the reduced SOx emission targets.