Seven Seas Mariner is a spacious all-suite, all balcony ship that offers classical interiors and a luxurious cruise experience. It features a wide range of public rooms and a nine deck high atrium lobby. Seven Seas Mariner passengers tend to be 40-60+ and Mainly American. When all cabins have double occupancy, the ship provides a space ratio of 70.6 tons per passenger and a crew to passenger ratio of one for every 1.6 passengers. At full capacity the space ratio is 66.5 tons per passenger and the crew ratio is one to 1.7 passengers.