In June 2013, the European Commission issued a legislative proposal to establish an EU system for monitoring, reporting and verifying (MRV) of CO2 emissions from large ships using EU ports.
There are different methods to monitor fuel on ships. This report analyses the costs and accuracy of the different methods. Methods with low investment costs in general incur higher costs in monitoring and reporting. The accuracy of the different methods varies significantly: from about 5% for bunker delivery notes to potentially less than 0.5% for fuel flow monitoring.
This also has an impact on the potential environmental benefits. While MRV in itself will not result in efficiency improvements, accurate data about fuel consumption can provide a basis for taking action to improve efficiency. Less accurate methods are unlikely to result in efficiency improvements.