The Navigator

Millionaire Rollo Treadway (Buster Keaton) sets off on a cruise to mend his broken heart after his beloved, Betsy (Kathryn McGuire), rejects his marriage proposal. Naturally, Rollo ends up at the wrong pier and boards a dilapidated boat, which (as it happens) Betsy has also boarded. Foreign operatives turn the vessel loose on the high seas, marooning the mollycoddled heirs, who have to fend for themselves.