Slave ships, large cargo ships specially converted for the purpose of transporting slaves, especially newly purchased African slaves to the Americas. As many as 20 million Africans were transported by ship. The transportation of slaves from Africa to America was known as the Middle Passage.-Spirits of the Passage
The Middle Passage was the stage of the triangular trade in which millions of Africans were shipped to the New World in the Atlantic slave trade. Ships departed Europe for African markets w/goods, traded for enslaved Africans, transported across the Atlantic. They were then sold or traded for raw materials, which was taken to Europe, completing the voyage. Middle Passage voyages were expensive & they were generally organized by companies or groups of investors rather than individuals.