The Diamond Princess is one of the largest Grand-class type of cruise ships. Built by the Mitsubishi Heavy Industries group in February 2004, it usually cruises to Alaska during the summer and to Australia and Asia at other times. Costing around $500 million dollars, the cruise ship has two 8 cylinder Wartsila 46 engines and two 9 cylinder Wartsila 46 engine. The 8- and 9- cylinder engines can approximately produce 8,500 kW and 9,500 kW of power engine respectively. Its two 20 megawatts motors made by Alstom Motors run up to 154 revolutions per minute. The ship is 290.2 meters in length and has a beam of 37.50 meters, which exceeds the usually 36 meters that Grand class cruise ships usually have.