Viking Grace uses completely sulphur-free liquefied natural gas (LNG) as fuel. All other Viking Line ships use diesel fuel that contains less than 0.1 weight percent of sulphur in accordance with the sulphur directives.
Viking Line has an internal programme for reducing exhaust fume emissions. Within this programme, the crews of the ships and Viking Line’s technical department develop ways to operate the ships more fuel-efficiently.
M/S Gabriella gets electricity from ashore when the ship is in port in Helsinki and Stockholm. M/S Rosella gets electricity from ashore when the ship is in port at night in Mariehamn. M/S Viking XPRS gets electricity from ashore in Tallinn. This reduces emissions into the air as well as engine noise in the port area.
Viking Line has focused on reducing nitrogen oxide emissions. One ship use technical solutions to reduce emissions. Viking Cinderella has been equipped with catalytic converters.