Costa Cruises is set to multiply to 17 ships by 2012 with Thursday's announcement that the European line has ordered two new 114,147-ton ships to be delivered in 2011 and 2012. The ships will be built at Fincantieri's Marghera shipyard in Italy, at an approximate cost of $1.4 billion and will be sister ships to the Costa Concordia, Costa Serena and Costa Pacifica. Both ships will accommodate 3,780 total passengers. Design of the two new ships will closely resemble Costa's Concordia class, with Samsara Spas with exclusive spa cabins and pools with retractable magrodomes. As a bonus feature, the two ships will have 16 additional veranda cabins and an overall total of 1,506 cabins, six more than the other Concordia-class ships. The addition of the ships will represent a 20 percent increase in the line's overall capacity. Visit [www.costacruises.com]. (DE)