With new, more stringent sulphur oxide (SOx) emission regulations due to take effect January 2015, Finnlines has ordered Wärtsilä Exhaust Gas Cleaning Systems for six of its Baltic and North Sea fleet of vessels, Wärtsilä said. By selecting the scrubber systems, Wärtsilä said the vessels will be able to operate in compliance with the new environmental regulations while continuing to operate on heavy fuel oil. The systems will also operate in compliance with the water discharge criteria set by regulators.