The propulsion package, which includes the main and auxiliary engines, gear boxes and controllable pitch propellers, will be delivered in June 2013, and the tankers are scheduled for delivery in mid 2014.

The Wärtsilä dual-fuel (DF) main and auxiliary engines will allow the ships to operate on liquefied natural gas (LNG), which minimises their environmental footprint. However, fuel flexibility, a primary benefit of the Wärtsilä DF engine technology, means that conventional marine diesel fuels can also be used if required. The switch between fuel types is made seamlessly without loss of power or speed.

The use of Wärtsilä's dual-fuel engine technology will enable these tankers to sail without restrictions in Sulphur Emission Control Areas (SECAs) and Nitrogen Emission Control Areas (NECAs). Natural gas is the most environmentally sound fuel today, and it fulfils current actual and known future marine emissions legislation coming into force in 2016.

'We are delighted to supply these new tankers with Wärtsilä's dual-fuel engine technology, which will enable them to operate safely, economically, and sustainably on LNG fuel. This order strengthens our position as the market leader in terms of LNG fuelled propulsion machinery,' says Aaron Bresnahan, Vice President, Wärtsilä Ship Power, Sales.

More than 2000 gas fuelled Wärtsilä engines are now in commercial operation in both land-based and marine applications. Together, they have accumulated more than 7 million operational running hours; a milestone that emphasizes Wärtsilä's leading position in gas and dual-fuel engine technology.

Wärtsilä in brief
Wärtsilä is a global leader in complete lifecycle power solutions for the marine and energy markets. By emphasising technological innovation and total efficiency, Wärtsilä maximises the environmental and economic performance of the vessels and power plants of its customers. In 2011, Wärtsilä's net sales totalled EUR 4.2 billion with approximately 18,000 employees. The company has operations in nearly 170 locations in 70 countries around the world. Wärtsilä is listed on the NASDAQ OMX Helsinki, Finland.
www.wartsila.com