Regent Seven Seas Cruises was formed in 1992 as Radisson Seven Seas Cruises, from the merger of Radisson Cruises and Seven Seas Cruises, and took its present name in 2006. It has built its identity on all-suite, all-inclusive luxury, a model it helped pioneer: Seven Seas Mariner entered service as the world's first all-suite, all-balcony cruise ship. The six ships in this directory are uniformly small by modern standards, ranging from the 28,550 GT Seven Seas Navigator, converted from an unfinished hull and the fleet's most individual ship, to the Explorer-class vessels at about 55,000 GT. Between them are Seven Seas Mariner and Seven Seas Voyager, and the newer trio of Seven Seas Explorer, Seven Seas Splendor and Seven Seas Grandeur, which refined the same spacious, suite-only formula at a larger scale.
The fleet — 6 ships in this directory
Sources: https://www.cruisecritic.com/articles/regent-seven-seas-cruises-history?stay=1&posfrom=2