My dining companions and I are nestled in a cozy corner booth, but with only 16 seats—most of them along a Hinoki wood chef’s counter—the entire restaurant feels intimate. Four Seasons I, the first sailing vessel from the storied luxury hotel chain’s new yacht division, has just raised anchor in Athens to set off for a 10-day voyage through the Greek isles. With Four Seasons I—and, in 2027, Four Seasons II—Four Seasons seeks to bring its impeccable hospitality to sea, where a growing segment of travelers is looking to spend their time. Truly a floating five-star resort, all the hallmarks of the Four Seasons experience are present on board. You’d expect no less from a hospitality portfolio with 30 Michelin stars, but when dining at sea so often means crowded buffets and kitschy hibachi restaurants, the food on board Four Seasons I feels subversively gourmet.