Jangada is a sailing raft made of a specific tree called Pau-de-Jangada, used by fishermen from the northern coast of Brazil. In the past the Jangada was made from logs and construction details were kept by local craftsmen. As these trees are seldom found, and sometimes prohibited to be cut, nowadays the Jangadas are built from boards which create a hull and small storing area between hull and bottom. In traditional ways, the Jangadas are sailed out for fishing in the sea with the morning breeze, and return in the afternoon with the favored breeze from the sea. Sometimes fishermen spend a few days at sea to have enough catch. Jangada in Wikipedia