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
Rabelo boat Porto. Rabelo boat The rabelo boat is a traditional Portuguese wooden cargo boat that was used for centuries to transport people and goods along the Douro River. It is flat-bottomed, with a shallow draught, which was necessary to navigate the often shallow fast-flowing waters of the upper Douro prior to the construction of dams and locks from 1968 onwards. Native to the Douro region, it does not exist in any other place in the world. Its history is closely linked to the production and trade of port wine. Before the arrival of the railway, the rabelo was the fastest and