There are clear advantages to the use of selective catalytic reduction marine technology for ship owners and operators. Firstly, it leads to a significant reduction in NOx emissions. Not alone will this make our marine environment cleaner and our air better, but also has benefits for those living on shore. Secondly, it is more fuel efficient (consumption per unit of power output) than other engines used hitherto in shipbuilding. So these new ships meet Stricter Emission Requirements Of IMO's Tier III Standards Unaffected by this, running costs remain competitive in comparison with older technology. Third, SCR systems have the lowest up front costs of the emission control technologies currently available on market. They also offer very low operational expenditure for around 47 years followed by 80 years tail stage cost lifespan, making them even more economical in terms of both cost and return over that time span. In addition, with the introduction of SCR marine technology companies can burnish their reputation as socially responsible citizens. Such strategies are appealing to the increasing numbers of environmentally aware customers and they will also give firms an edge in market competition.