seatec - Finnish marine technology review 1/2012 | Page 20

chipelago – a navigational challenge and also in part a natural conservation area. Because of this, one of the key points in the design of Viking Line’s new cruise ferry was to decrease the ship’s propensity to make waves. “Minimising waves in the ship’s wake was a significant issue when the ferry’s hydrodynamics design was on the drawing board. With the current hull design, the ship’s waves will not cause erosion while sailing through the archipelago,” Anttila points out. “Also, the ship’s noise levels have been reduced.” While the main fuel of the ship will be liquefied natural gas (LNG), the engines will be able to utilise MGO gas oil as a substitute fuel. “The ship will be capable of operating for two to three days without refueling. This, too, is a safety feature,” says Anttila. COMPLYING WITH IMO REGULATIONS Running on LNG fuel, the new ship will be quite environmentally friendly. In fact, it is considered to be the most environmentally friendly cruise ferry ever built, once completed. Around the Baltic Sea region, new International Maritime Organisation (IMO) regulations are very strict. For the new ship, discharge and pollution into the sea have been eliminated, and the emission into the air is significantly low. The ship will be powered by four dual-fuel Wärtsilä 8L50DF main engines. Running on LNG, the vessel will have virtually no SOx emissions and its NOx emissions will be at least 80 percent below current The production of the LNG-fuelled cruise ferry is about to start at Turku Shipyard. Viking Line’s CEO Mikael Backman is pushing the button. 18 seatec 1/2012