Cunard Line, part of Carnival Corporation, was the first company to provide a regular transatlantic passenger steamship service. In recent years, however, the popularity of transatlantic cruises has declined and Cunard Line wanted to return to "the glory days of transatlantic travel". So it set up the Queen Mary Project in 1998, which resulted in the Queen Mary 2, the largest (151,400 tons), longest (345 metres), tallest (72 metres) and widest (45 metres) liner ever built.

Wärtsilä solution
To power this enormous vessel, four Wärtsilä 46 EnviroEngines with a total output of 67.2 MW were chosen. These engines incorporate the latest common-rail fuel injection technology, so they operate without any visible smoke. The Wärtsilä EnviroEngine originated in a joint project between Carnival Corporation, the parent company of Cunard Line, and Wärtsilä Corporation to develop a new “earth-friendly” power system.