Duchess of Cambridge to name new cruise liner The Duchess, whose baby is due in mid-July, will be at Southampton on June 13 for the naming ceremony of Princess Cruises' 3,600-passenger Royal Princess. Features of the new ship include a top-deck, glass-bottomed walkway extending 28ft (8.5m) beyond the edge of the ship, the largest pastry shop at sea and balconies on all outside staterooms. The Royal Princess will go on Mediterranean cruises this summer followed by Eastern Caribbean cruises beginning in the autumn.