Winds in the Age of Sail He took the southeast trade winds directly northwest across the South Atlantic to the Cape Verde Islands, the Azores, and home. Not only did Da Gama find a sea route to India, he discovered the most efficient sailing route there and back. In 1500 Pedro Álvares Cabral sailed somewhat west of Da Gama's route and bumped onto the coast of Brazil. Portuguese and Dutch in the Indian Ocean: After a few more voyages the Portuguese learned two things: that there was little market for European goods in the east, and the large Portuguese ships could outfight nearly any local craft.
Portuguese discoveries tip of Africa, disproving the view that had existed since Ptolemy that the Indian Ocean was separate from the Atlantic. Also at this time, Pêro da Covilhã reached India via Egypt and Yemen, and visited Madagascar. He recommended further exploration of the southern route. As the Portuguese explored the coastlines of Africa, they left behind a series of padrões, stone crosses inscribed with the Portuguese coat of arms marking their claims, and built forts and trading posts. From these bases, the Portuguese engaged profitably in the slave and gold trades. Portugal enjoyed a virtual monopoly of the Atlantic slave trade