The fourth of the five Atlas Ocean Voyages polar-class ships scheduled to launch (a debut date has yet to be announced), 196-guest World Seeker will join identical polar-class vessels World Navigator, World Traveller, and World Voyager in offering what Atlas is calling “luxe-adventure” cruising to “destinations less traveled.” The Fort Lauderdale-based company is a subsidiary of Portugal’s Mystic Invest Holding, which operates river cruise line DouroAzul and other brands, and is staffed by executives with decades of experience at cruise lines. Details on World Seeker’s itineraries and ports of call haven’t been released yet, but it appears the ship’s cruises will deliver adventure on a global scale.