It could happen -— I saw a movie where it happened so it must be true. </tounge in cheek>
Waterworld: In a future where the polar ice caps have melted and most of Earth is underwater, a mutated mariner fights starvation and outlaw “smokers,” and reluctantly helps a woman and a young girl find dry land.
Hey, it was a subtle plot — the villains used jetskis and were headquartered on an oil tanker...