Wärtsilä Oyj Abp has been awarded a number of contracts to supply its Aquarius UV Ballast Water Management System (BWMS) to global shipping operators. The systems will enable the vessels to be compliant with the Ballast Water Management Convention regulations that entered into force in September 2017 for all new build vessels. The contracts cover in total 13 systems, the orders for which were all booked in quarter four 2018. The work is being carried out for ships being built at yards in China. The orders cover installations in a RoRo ferry, two RoPax, six tankers and four container vessels. In addition to the demand for new build vessel installations, ship owners are also increasingly requesting quotations for their existing sailing fleet. For a vessel to be compliant with the IMO's Ballast Water Management Convention, owners have to install a BWMS at the next special survey of the vessel after 8 September 2019. This essentially gives a five year window for retrofits between September 2019 and September 2024, depending on when the special survey is due.