... electricityWhile docked at the port, ships shut off their propulsion engines, but use their auxiliary engines to power refrigera-tion, lights, pumps and other equipment. If ships connect to ... sulphur emissions.In these areas, the sulphur content of fuel used on-board ships must not exceed 1.5%. Alternatively, ships must fit an exhaust gas cleaning system or use other methods to limit ... standards for NOx or PM emissions from sea-going ships. Cost-effective measurese costs of typical measures for reducing the emissions of SO2 from ships range from 0.3 to 2.5 €/kg and of NOx...