However, there was broad agreement among
members of the correspondence group that SCR can
meet the tier III limits as a sole emission-reduction
strategy for most, if not all, marine engines and vessel
applications. It is an emission reduction method that
reduces NOx emissions, through after-treatment
technology, by using a catalyst to chemically reduce
NOx. Some marine engine manufacturers are already
marketing SCR-based tier III-compliant SCR engines During its sixty-fifth session, the MEPC: