Traditional fishing boat were used for war and trade. Some ancient vessels were propelled by either oars or sail, depending on the speed and direction of the wind (see trireme and bireme). The Chinese were using sails around 3000 BC, of a type that can still be seen on traditional fishing boats sailing off the coast of Vietnam in Ha Long Bay. A jangada is an elegant planked fishing boat used in northern Brazil. It has been claimed the jangada dates back to ancient Greek time. It uses a triangular (lateen) sail, which allows it to sail against the wind. A felucca is
A House-Boat on the Styx underworld. The book begins with Charon, ferryman of the Styx being startled—and annoyed—by the arrival of a houseboat on the Styx. At first afraid that the boat will put him out of business, he later finds out that he is actually to be appointed the boat's janitor. What follows are eleven more stories (for a total of twelve) which are set on the house boat. There is no central theme, and the purpose of the book appears to be as a literary thought experiment to see what would happen if various famous dead people were put in the same room