The Last Sail

In the future, all of our worst apocalyptic nightmares come true. At the end of the world, the only thing that matters is surviving while others struggle to uphold civilization. Because of melted ice caps, most of Earth's land has been engulfed in water where pollution nearly prevents anyone from finding food. Going vegan was neither an option as the air pollution killed most of every population including plants. Poisoning their roots so that the consumer dies with the plant. Nonetheless, it was easier to live on water than on land. Technological advancements help this become possible for most humans, but there is one crew of no similarity who strives on a sailboat. The ship is called The Last Sail because it seems to be the only sail left.
(The idea came from Seahawk from She-Ra)