The Ritz-Carlton Yacht Collection hopes to debut in the Caribbean in late 2019 It is a joint venture between Oaktree Capital, a private equity firm that will own the ships, and Ritz-Carlton, a unit of Marriott Corp., which will manage and market them. It is the first new entrant in the luxury cruise market since SeaDream Yacht Club was launched in 2002. Ritz-Carlton is counting on the contemporary look of its ships, the relatively large space available for public rooms and suites and the service level imported from its resorts to distinguish itself.