Celebrity Silhouette is the fourth in this new class of ships,including Lawn Club - the first real grass lawn at sea, state-of-the-art spa and fitness facilities, award-winning dining venues and some of the coolest bars at sea.  Celebrity Silhouette passengers tend to be 40+ and Mostly American. When all cabins have double occupancy, the ship provides a space ratio of 42.8 tons per passenger and a crew to passenger ratio of one for every 1.9 passengers. At full capacity the space ratio is 40.7 tons per passenger and the crew ratio is one to 2 passengers.