MSC Cruises has signed a contract ordering one ship and taking out an option for another. The confirmed buy is the fifth ship order for the line. The cruise line, which has its North American headquarters in Fort Lauderdale, said its contract with Chantiers de l'Atlantique is for a Panamax ship. The new ship is to be delivered in March 2008. MSC Cruises already had contracts with Chantiers de l'Atlantique to build two Panamax and two post-Panamax vessels. Post-Panamax ships are too large to fit through the canal. The latest addition and option are for vessels in the same class as the 89,600-ton MSC Musica, due for its inaugural sailing July 1. MSC Orchestra, the second Panamax ship, is scheduled to join the fleet in 2007.