The Navigator (1924 film)

The Navigator is a 1924 comedy directed by and starring Buster Keaton. The film was written by Clyde Bruckman and codirected by Donald Crisp.

Agents for the other small nation in the conflict decide to set the ship adrift that same night. When Betsys father checks up on the ship, he is captured and tied up ashore by the saboteurs. Betsy hears his cry for help and boards the ship to look for him, just before it is cut loose.The Navigator drifts out into the Pacific Ocean. The two unwitting passengers eventually find each other. At first, they have great difficulty looking after themselves as they had servants to do that for them, but adapt after a few weeks. At one point, they sight a navy ship and hoist a brightly colored flag, not realizing it signals that the ship is under quarantine. As a result, the other vessel turns away. ........

Source: Wikipedia