Ships Emission Management Systems (SEMS) was developed to help port owners to account the shipping emissions and analyse the emissions improvement measures in ports, under the requirement of MARPOL Annex VI. Ship emissions have remarkable global, regional, and local adverse impacts on the air quality on sea and land.
The most important pollutants emitted from ships are nitrogen oxide (NOX), sulphur dioxide (SO2), carbon dioxide (CO2), hydrocarbons (HC), and particulate matter (PM). The health effects of air pollution at ports may include asthma, other respiratory diseases, cardiovascular disease, lung cancer, and premature death. The systems have been used by Johor Port Authority to monitor all the air emissions for all ports in Johor. The system includes web-based and mobile application.