Seven Seas Explorer will be the largest vessel in the Regent Seven Seas Cruises fleet, with the highest space and staff-to-guest ratios ever seen in modern cruise ship design. This will enable Regent to deliver a highly personalised service.  Seven Seas Explorer passengers tend to be 40-60+ and Mainly American. When all cabins have double occupancy, the ship provides a space ratio of 72 tons per passenger and a crew to passenger ratio of one for every 1.4 passengers. At full capacity the space ratio is 72 tons per passenger and the crew ratio is one to 1.4 passengers.