This handsome ship features large, spacious public rooms with a pleasing décor and all outside cabins. Passengers on the Royal Princess tend to be mixed ages and American and British depending on region and ship.. When all cabins have double occupancy, the ship provides a space ratio of 42.5 tons per passenger and a crew to passenger ratio of one for every 2 passengers. At full capacity the space ratio is 37.5 tons per passenger and the crew ratio is one to 2.3 passengers.