Cold Ironing

Cold ironing is the original term for connecting a berthed ship to shore electrical power and shutting down its onboard engines, dating to when a ship’s iron boilers went cold in port. It eliminates at-berth exhaust emissions, replacing them with grid emissions, which is a clear local air-quality gain in port cities and a CO2 gain where the grid is clean. Connection follows the IEC/IEEE/ISO 80005 standards, and FuelEU Maritime and several national rules mandate its use for certain ships at major ports from 2030.